Research Articles Achieving Functional Meta-Devices by Generalized Meta-Atom Model for Metasurfaces and Genetic Algorithm Jian Chen, Wei Ding, Yuan-Cheng Shi, Zhen-Xu Yao, Rui-Xin Wu 2302255 First Published: 20 December 2023 Description unavailable The use of a single machine-learning-based meta-atom model is demonstrated to enable the design of various functional meta-devices, verified through simulations and experiments. By pixelating the unit cell of metasurfaces, the meta-atom model is developed to cover the entire pixel space and simulate any potential meta-atoms operating at any polarization. This enables significantly improving the design efficiency for diverse meta-devices. Abstract Full text PDF References Request permissions Open Access Building Conventional Metasurfaces with Unconventional Interband Plasmonics: A Versatile Route for Sustainable Structural Color Generation Based on Bismuth Fernando Chacon-Sanchez, Carlota Ruiz de Galarreta, Eva Nieto-Pinero, Marina Garcia-Pardo, Elisa Garcia-Tabares, Nicolas Ramos, Miguel Castillo, Martin Lopez-Garcia, Jan Siegel, Johann Toudert, C. David Wright, Rosalia Serna 2302130 First Published: 13 December 2023 Description unavailable They show how single-element, non-conventional interband plasmonic materials, such as Bismuth, can be successfully nanostructured toward the realization of both Gap-Plasmon-Metasurfaces and Fabry–Pérot cavities for subtractive structural colors. It results demonstrate the potential of Bismuth as a reliable candidate for visible plasmonics, while inspiring the use of p-block materials as suitable plasmonic elements alternative to Au and Ag in the future. Abstract Full text PDF References Request permissions The Faraday Effect and Phase Transition in the CH3NH3PbI3 Halide Perovskite Single Crystal Anastasia A. Shumitskaya, Vadim O. Kozlov, Nikita. I. Selivanov, Constantinos C. Stoumpos, Valerii S. Zapasskii, Yury V. Kapitonov, Ivan I. Ryzhov 2302095 First Published: 07 December 2023 Description unavailable It reports on first observation of Faraday rotation (FR) in MAPbI3 single crystal and show its paramagnetic nature. The FR signal is suppressed by arising birefringence at phase transition from cubic to tetragonal phase. It develops a simple model describing that suppression, and show that the birefringence itself can serve as highly sensitive probe for polarimetric detection of phase transitions. Abstract Full text PDF References Request permissions Sub-Nanoconfined Aggregation-Induced Emission Molecules via Stacked Layers of Microtubular Covalent Organic Frameworks for Enhanced Fluorescence Qiyan Wang, Dandan Han, Zhen Zhang, Armin Rezayan, Sheng Chen, Qidong Zhang, Lin Dong, Junlu Sun, Ronghan Wei, Dan Wu 2302128 First Published: 23 November 2023 Description unavailable Hollow microtubular COFs (HT-COFs) with 0.37 nm subnanometer confinement sites are used to confine AIEs. The hollow channel allows easy access to the AIEs, while the interlayers partially trap AIEs, restricting their rotation and aiding the radiative processes. Besides, through exchanging of various AIEs, the versatility of the HT-COFs interlayer as a restriction site is demonstrated. Abstract Full text PDF References Request permissions Color Tunable Phosphorescent Neutral Manganese(II) Complexes Through Steric Hindrance Driven Bond Angle Distortion Pengfei She, Zhong Zheng, Yanyan Qin, Feiyang Li, Xiaokang Zheng, Dongdong Zhang, Zhiyuan Xie, Lian Duan, Wai-Yeung Wong 2302132 First Published: 15 December 2023 Description unavailable An effective strategy to engineer the phosphorescence colors of tetrahedral neutral Mn(II) complexes is presented. These phosphorescent Mn(II) complexes exhibit wide color tunability from blue–green, green to yellow–green. Furthermore, by using these Mn(II) complexes as dopants, high-performance green organic light-emitting diodes (OLEDs) with a record-breaking external quantum efficiency of 15.7% are achieved. Abstract Full text PDF References Request permissions Label-Free Imaging of Low-Index Samples Using Substrate-Enhanced Subwavelength-Resolution Scattering Nanoscopy Dong Wang, Mengping Qi, Yurong Cao, Yi Zhang, Yong-Hong Ye 2302133 First Published: 25 December 2023 Description unavailable A simple, fast, and effective metal layer substrate is prepared that improves the electric dipole resonance of the nanoparticles. Compared with a silica substrate, the scattering intensity of SiO2 nanoparticles is enhanced by ≈3.7 times under 540 nm wavelength illumination and a bacterial capsule ≈100 nm thick is successfully observed. Substrate-enhanced scattering nanoscopy has potential implications in super-resolution, high-contrast, label-free imaging of low-index samples. Abstract Full text PDF References Request permissions High-performance Self-powered Ultraviolet-visible-near infrared Broadband Photodetectors Based on Sb2Se3/TiO2 Heterojunctions and Multifunctional Applications Songyao Gao, Jianping Xu, Shaobo Shi, Jing Chen, Jianghua Xu, Lina Kong, Xiaosong Zhang, Lan Li 2302141 First Published: 31 December 2023 Description unavailable Sb2Se3 nanoparticles are obtained by a simple two-step potentiostatic electrochemical deposition method. By constructing an Sb2Se3/TiO2 heterojunction, high-performance ultraviolet-visible-near infrared (UV-VIS-NIR) broadband self-powered photodetection is achieved. The application model construction of UV encryption IR light communication, UV and NIR joint encryption VIS light communication, and IR flaw detection are realized. Abstract Full text PDF References Request permissions A Spatiotemporal Cascade Platform for Multidimensional Information Encryption and Anti-Counterfeiting Mechanisms Maocheng Zuo, Shuqi Zou, Yu Gao, Dun Zhou, Kongqing Zhang, Xiaobai Li, Hongwei Ma, Bin Li, Wei Huang 2302146 First Published: 22 November 2023 Description unavailable The excited-state multi-channel radiative relaxation photophysical processes of excitation-dependent organic chromophores for dynamically regulating polychromic luminescence on a time scale are systematically investigated, and an intelligent rewritable anti-counterfeiting system is established by adopting the cascading processes of “spatial protection- optical trigger- fluorescent multi-level output-time rewriting”, which enables 4D spatiotemporal dynamic regulation multi-level, multi-mode, on-demand encryption/ instantaneous decryption. Abstract Full text PDF References Request permissions Improving Electroluminescence of Two-Coordinate Au(I) Complexes: Insights into Steric and Electronic Control Seunga Heo, Byung Hak Jhun, Sihyun Woo, Hwang Suk Kim, Inkoo Kim, Joonghyuk Kim, Won-Joon Son, Yongsik Jung, Kyungmin Kim, Jaeheung Cho, Youngmin You 2302148 First Published: 20 November 2023 Description unavailable Molecular factors that control photoluminescence efficiencies of two-coordinate Au(I) complexes involve the emission energy and the charge in the Au 5d-orbital. Abstract Full text PDF References Request permissions Hybrid-Phase Assisted Amplitude and Phase Control Using Full-Space Metasurface Chaohui Wang, He-Xiu Xu, Tong Liu, Fan Zhang 2302153 First Published: 07 December 2023 Description unavailable A hybrid phase approach is proposed to achieve independent and arbitrary control of amplitude and phase responses for circularly polarized waves in full space. To validate the concept, a full-space dual-channel meta-hologram is experimentally demonstrated, manifesting images of letters T’ and ‘R’ at lower and upper frequencies (f1 and f2), respectively. Abstract Full text PDF References Request permissions Triplet Exciton Harvesting in Water by a Structurally Simple Organic Phosphor with Sustained Afterglow and Lifetime Tunability Pradip Pattanayak, Arnab Nandi, Ramen Patra, Pradipta Purkayastha 2302155 First Published: 08 December 2023 Description unavailable An intuitively designed organic phosphor could tune the ultra-long room temperature phosphorescence in aqueous environment under ambient conditions through imposed restrictions in the molecular dynamics. Abstract Full text PDF References Request permissions Interstitial Oxygen Modulating Reversible Upconversion Luminescence Junshan Hu, Weilong Kong, Xiaomin Bian, Jiazheng Hao, Ruonan Wang, Shaoyi Wu, Lunhua He, Lei Shen, Hao Fu 2302157 First Published: 26 December 2023 Description unavailable A robustly reversible upconversion luminescence and quenching can be observed in a family of phosphors by alternately changing the annealing atmospheres of hydrogen and air. The removal and formation of interstitial oxygen defects, which can generate the Ba–O mixed state to absorb the energy of 980 nm near-infrared light, is responsible for this anomalous phenomenon. Abstract Full text PDF References Request permissions A Multifunctional Hydrogen Bond Bridge Interface to Achieving Efficient and Stable Perovskite Solar Cells Leying Zha, Lei Ning, Zeyuan Sun, Lixin Song, Pingfan Du, Jie Xiong 2302163 First Published: 20 November 2023 Description unavailable The 4,6-diamino-2-mercaptosine interface bonds the electron transfer layer and perovskite layers by building a hydrogen bridge, therefore regulating interfacial contact, transferring photoelectrons, and improving the film quality of perovskite film. The unencapsulated perovskite solar cell exhibits higher power conversion efficiency with excellent long-term stability. Abstract Full text PDF References Request permissions High-Performance Near-Infrared Organic Photodetectors Enabled by Fabricating an Interdigital Heterojunction Xin Yu, Hui Lin, Zeyu He, Xicheng Yao, Xiaoyang Du, Zhenhua Chen, Gang Yang, Caijun Zheng, Silu Tao 2302170 First Published: 08 December 2023 Description unavailable The interdigital heterojunction structure is designed, forming a tunable large-area bicontinuous phase. The abundant donor/acceptor interfaces and direct carrier transport channels enhance the device photocurrent, while the enhanced film crystallinity effectively reduces the trap density and suppresses the dark current. Therefore, high-performance near-infrared organic photodetectors with enhanced detectivity are obtained. Abstract Full text PDF References Request permissions Electrically Tunable Strong Optical Nonlinearity in Near-Infrared by Coupled Metallic Quantum Wells Ching-Fu Chen, Haoliang Qian, Zhaowei Liu 2302176 First Published: 25 December 2023 Description unavailable An electrically tunable nonlinear optical device working at near-infrared wavelength is theoretically and experimentally demonstrated. Ultrahigh optical second-order nonlinearity of 1500 pm V-1 from TiN-based coupled metallic quantum wells can be electrically tuned by external electric field. Tunability of second-order susceptibility χ(2) reaches a 63% modulation depth with an average tunability of 10.5% per volt. Abstract Full text PDF References Request permissions Red Fluorescent Carbon Dots with Alkyl Chain Achieving Stable Electroluminescence via an In Situ Electric Excitation Jian Shen, Tianyang Zhang, Wan-shan Shen, Zenan Li, Weijie Yuan, Hui Huang, Yang Liu, Liang-sheng Liao, Zhenhui Kang 2302178 First Published: 28 November 2023 Description unavailable A new strategy is provided to overcome the obstacle of mismatch of interfacial energy levels in the LEDs by an in situ electric excitation. With the continuous injection of current, the interaction of alkyl chains between RCDs and TFB is gradually enhanced to overcome interfacial energy barriers and achieve stable carrier injection. Abstract Full text PDF References Request permissions Advanced Effect of the Substitution of Zn2+ on the Solid-State Synthesis of Red Phosphor, High Temperature Phase NaMgPO4:Eu2+ Yuze Du, Takatoshi Seto, Wenjing Liu, Yuhua Wang, Xiongbo Ma 2302183 First Published: 28 January 2024 Description unavailable The olivine-type phase NaMgPO4:Eu2+ is prepared by solid state reaction method. The phase transition temperature of the phosphor is reduced by adding Zn2+, so that the olivine-type phase NMP:Eu2+ can be stabilized at a lower temperature. Abstract Full text PDF References Request permissions Energy Gain and Loss Processes in OLEDs with Spacer-Separated Electron–Hole Pairs Investigated by Magnetic Field Effects Chenghao Liu, Zhen Chen, Huitian Du, Yuan Yu, Junfeng Ren, Jihui Fan, Shenghao Han, Zhiyong Pang 2302192 First Published: 05 February 2024 Description unavailable The energy gain and loss processes related to microscopic spin dynamic mechanisms in exciplex-based organic light-emitting diodes with spacer-separated electron–holes pairs are investigated using the magnetic field effect technique. Intersystem crossing, reverse intersystem crossing, triplet–triplet annihilation, scattering and dissociation channels of triplet-charge annihilation, and additional Dexter energy transfer processes are identified. Abstract Full text PDF References Request permissions Synergistic Passivation Inducing Long-Term Stability for Fluorescent CsPbI3 Perovskite Nanocrystals Yiyuan Tang, Zhen Wu, Xin Zhang, Kaifeng Liao, Guojie Wang 2302193 First Published: 21 November 2023 Description unavailable An effective synergistic passivation strategy based on n-octylphosphonic acid (OPA) and (3-aminopropyl)triethoxysilane (APS) is applied to improve the performance of CsPbI3 nanocrystals. The OPA/APS-capped CsPbI3 nanocrystals exhibit significantly enhanced photoluminescence quantum yield and high stability with 80.5% of its initial fluorescence intensity after 120 days of ambient storage. Abstract Full text PDF References Request permissions Prediction of Quantum Yields of Monolayer WS2 by Machine Learning Jolene W. P. Khor, Trang Thu Tran, Anir S. Sharbirin, Sammy X. B. Yap, Hyunseung Choo, Jeongyong Kim 2302195 First Published: 22 November 2023 Description unavailable Machine learning (ML) model to predict the photoluminescence quantum yield (PLQY) of monolayer tungsten disulfide (1L-WS2) is developed using data extracted from 1208 PL spectra and corresponding measurement conditions. Data-driven prediction not only enables the convenient PLQY estimation of 2D semiconductors, but also helps identifying key parameters influencing PLQYs. Abstract Full text PDF References Request permissions Rational Design of AIE Photosensitizers with Full-Visible Color Emission and Efficient ROS Generation Weidong Yin, Yucheng Ma, Shuge Chen, Longjiang Xing, Shaomin Ji, Jacky W. Y. Lam, Ryan T. K. Kwok, Yanping Huo, Ben Zhong Tang 2302197 First Published: 16 November 2023 Description unavailable A molecular design concept to enhance reactive oxygen species (ROS) generation is presented, and full-wavelength visible light materials are synthesized and applied to photodynamic therapy and catalysis of endoperoxide formation. This work provides insight into improving the ROS efficiency of photosensitizers and controlling the release of 1O2 to achieve afterglow therapy. Abstract Full text PDF References Request permissions Deep Learning Design for Multiwavelength Infrared Image Sensors Based on Dielectric Freeform Metasurface Bo Xiong, Yihao Xu, Wenwen Li, Wei Ma, Tao Chu, Yongmin Liu 2302200 First Published: 31 December 2023 Description unavailable In this study, a freeform dielectric metasurface is designed with the wavelength-multiplexing focusing effect based on a deep learning model, which can separate the mixed near-infrared light into distinct wavelengths. Near-infrared multispectral imaging is demonstrated, which allows for the detection and decoding of images at three wavelengths. The proposed technology has various applications in clinical medicine and deep-space exploration. Abstract Full text PDF References Request permissions Synthesis of High Refractive Index Polymer Thin Films for Soft, Flexible Optics Through Halomethane Quaternization of Poly(4-Vinylpyridine) Ni Huo, Jeremy Rivkin, Ruobin Jia, Yineng Zhao, Wyatt E. Tenhaeff 2302201 First Published: 15 January 2024 Description unavailable High refractive index polymers are prepared through quaternization of poly(4-vinylpyridine) with (di)halomethane reagents. Reaction of P4VP with CH2I2 results in refractive indexes greater than 2.0 at 633 nm. Prepared by initiated chemical vapor deposition, optical-quality HRIP coatings can be prepared on polymeric substrates. They are thermally stable to 200 °C and can withstand 10% uniaxial strain without fracturing. Abstract Full text PDF References Request permissions Unraveling UV Degradation Pathways in Inverted Organic Solar Cells Incorporating A-DA'D-A Type Non-Fullerene Acceptors Jingyang Xiao, Ning Li, Qingwu Yin, Yonggang Min, Hin-Lap Yip 2302202 First Published: 06 February 2024 Description unavailable Evidence of ZnO-induced decomposition of A-DA'D-A type NFA under UV illumination is demonstrated in this work. Using SnO2 as an alternative ETL, performance degradation of OSCs is mainly ascribed to a high concentration of surface defects, which can be overcome by amine modification of the SnO2 surface. Abstract Full text PDF References Request permissions Scintillator Ink with Low-Temperature Thermoplastic for Micro X-Ray Imaging Tianchi Wang, Xuhui Xu, Shuyi Yao, Jing Yu, Zhi Yang, Jianbei Qiu, Yang (Michael) Yang, Xue Yu 2302203 First Published: 12 December 2023 Description unavailable To address the issues of light scattering and optical crosstalk, a low-temperature thermoplastic scintillator ink that achieves an impressive spatial resolution of over 22 lp mm−1 (≥22.5 µm) is designed. The scintillator ink has excellent rheological properties while exhibiting high adhesion and processability, so customized high-resolution X-ray imaging is achieved. Abstract Full text PDF References Request permissions Polymer Cross-Linking Strategy Enables High Performance and High Mechanical Stability Flexible Quasi-2D Perovskite Light-Emitting Diodes Ting Li, Yanbo Gao, Yanjie Wu, Min Lu, Junhua Hu, Yu Zhang, Zhennan Wu, Xue Bai, Fengping Yan 2302053 First Published: 23 November 2023 Description unavailable A multifunctional polylactic acid nature polymer with high flexibility is first incorporated into a quasi-2D film, which undergoes in situ cross-linking and forms a polymer cross-linking network in a quasi-2D perovskite film. Finally, the champion external quantum efficiency (EQE) of 15.94% is successfully implemented and maintains an initial EQE of over 60% after 10 000 bending cycles with a curvature radius of 3 mm. Abstract Full text PDF References Request permissions Efficient Deep-Blue Light-Emitting 2D (100)-Oriented Perovskites and Spectral Broadening by Exciton Self-Trapping for White-light Emissions Xuerui Chang, Yufan Lin, Xiaohua Cheng, Ying Han, Li Cong, Longyun Lv, Yuxin Jia, Juan Li, Jun Yin, Bin-Bin Cui 2302211 First Published: 16 January 2024 Description unavailable This article synthesize two 2D (100)-oriented organic–inorganic hybrid perovskites of (TFI)2PbBr4 and (TFI)2PbCl4·H2O with similar crystal structures and negligible intrinsic lattice distortions, exhibiting efficient deep-blue and bluish-white luminescence, respectively. The adjustment of halogen strengthens the “electron-phonon” coupling in chlorine system, so the (TFI)2PbCl4·H2O shows a spectral broadening originating from self-trapping excitons (STEs). Abstract Full text PDF References Request permissions [2.2]Paracyclophane-Based Double Helices: Tunable Circularly Polarized Luminescence Driven by Self-Assembly Jing He, Yanqing Fan, Zhe Lian, Shengzhu Guo, Ying Wang, Hua Jiang 2302221 First Published: 10 December 2023 Description unavailable Herein the double helices based on planar chiral [2.2]paracyclophane and tetraphenylethylene are reported, which demonstrates enhanced circularly polarized luminescence induced by self-assembly, with tunable dissymmetry factors ranging from 10−4 to 10−2 and a high quantum yield of up to 51% in the PMMA films. Abstract Full text PDF References Request permissions Greatly Enhanced Magnetic and Magneto-Optical Properties of Bismuth Iron Oxide Sillenite Crystal with Cobalt–Iron Codoping Meng-Li Liu, Cheng Wang, Xuan Wu, Jin-Ru Shen, Teng Gao, Xin Chen, Xiao-Lin Hu, Nai-Feng Zhuang 2302235 First Published: 25 February 2024 Description unavailable DFT calculation is a feasible way for predicting the magneto-optical Faraday rotation angle of Bi25FeO40 sillenite crystal. A series of cubic Bi26-x-yCoxFeyO40 crystals are prepared by hydrothermal method. Bi19.8Co3.0Fe3.2O40 crystal has a stronger magneto-optical effect than the commercial Bi:YIG crystal in 1500–1800 nm. It opens up new possibility for the creation of novel multiple functions magneto-optical devices. Abstract Full text PDF References Request permissions Defect-Induced Rashba Effect in Metal Halide Perovskite Thin Films Deposited on a Flexible Substrate Qi Zhang, Sanfeng Lei, Chenyu Hu, Xixiang Zhu, Jinpeng Li, Kai Wang, Shufang Zhang, Ruichen Yi, Haomiao Yu 2302238 First Published: 01 March 2024 Description unavailable By employing a silicone rubber substrate with a high thermal expansion coefficient, the Rashba effect in perovskite thin films is observed at room temperature. This work establishes, for the first time, a connection between the Rashba effect and defects in perovskite materials, and a promising way toward manipulation of the Rashba splitting. Abstract Full text PDF References Request permissions High-Efficiency Solution-Processed Hyperfluorescent Organic Light-Emitting Diodes Enabled by Novel Triazatruxene-Based Exciplexes with High Up-Conversion Efficiency Qian Wang, Yang Liu, Yushuai Xu, Zixun Tang, Yuhang Guo, Yuliang Wu, Hui Tong, Zhiyuan Xie 2302245 First Published: 26 January 2024 Description unavailable The novel triazatruxene-based exciplex is proposed to sensitize conventional fluorescent dyes. Benefiting from the small activation energy for triplet up-conversion and less triplet non-radiative quenching, the new TPDI:PO-T2T exciplex is able to up-convert efficiently triplet excitons. Fast up-conversion shortens the residence time of triplet excitons, suppressing the detrimental Dexter energy transfer. Solution-processed exciplex-sensitized hyperfluorescent organic light-emitting diodes achieve a record-high maximum external quantum efficiency of 16.0%. Abstract Full text PDF References Request permissions Facile Preparation of Ternary Cd0.9Pb0.1Se Quantum Dots Toward Photoelectrochemical Photodetectors Jian Zhang, Yule Zhang, Songrui Wei, Shaohui Zhang, Chang Xu, Feicui Xu, Muhammad Sultan Irshad, Yanqi Ge, Han Zhang, Chengtao Yu, Lingfeng Gao, Hao Wang 2302250 First Published: 25 December 2023 Description unavailable Based on a three-electrode testing system, the photo-response properties of the Cd0.9Pb0.1Se quantum dots-based photoelectrochemical photodetectors are carefully explored. Excitingly, the device can exhibit excellent detection capability under weak light (5.6–199 µW∙cm-2), but also achieve photo-responsivity of 6.96 mA∙W-1 and a detection rate of 1.2 × 109 Jones. This work opens a new pathway for photoelectrochemical-type weak light detectors. Abstract Full text PDF References Request permissions Sulfonate Additive Simultaneously Suppresses Interstitials and Vacancies Toward Efficient and Stable Perovskite Quantum Dot LEDs Tao Fang, Shichen Yuan, Xiansheng Li, Qingsong Shan, Yihui Zhou, Bo Xu, Gaoyu Liu, Shengli Zhang, Xiaoming Li, Weijin Li, Zhiyong Fan, Haibo Zeng 2302253 First Published: 25 December 2023 Description unavailable Sulfonate additive is used for synchronous suppression of interstitial defects and vacancies for high-performance perovskite quantum dot light-emitting diodes. The optimized green light device exhibits high stability with T50 of 127 h and high external quantum efficiency of 20.4%. This work inspires new ideas in the design of reaction environment of perovskite quantum dots. Abstract Full text PDF References Request permissions Open Access Surface-Engineered Methylammonium Lead Bromide Single Crystals: A Platform for Fluorescent Security Tags and Photodetector Applications Somnath Mahato, Magdalena Tamulewicz-Szwajkowska, Sudarshan Singh, Dominik Kowal, Shaona Bose, Jarosław Serafińczuk, Krzysztof Czyż, Roman Jędrzejewski, Muhammad Danang Birowosuto, Samit Kumar Ray, Ahmed L. Abdelhady 2302257 First Published: 31 January 2024 Description unavailable This study optimizes in-situ formation of a thin polycrystalline MAPbBr3 layer on bulk MAPbBr3 single crystals with intense surface green emission under UV light. Utilizing this, a semiconductor-based fluorescent quick response (QR) code integrated with a photodetector is developed, presenting potential for highly efficient dual security tags in applications like bank cards, passports, and door security systems, among others. Abstract Full text PDF References Request permissions Open Access Striking Change in Radiative Lifetime and Asymmetry Ratio with Temperature for the Double Perovskite Cs2NaEuCl6 Daiwen Xiao, Hei-Yui Kai, Guohua Jia, Ka-Leung Wong, Peter A. Tanner 2302261 First Published: 23 November 2023 Description unavailable It is unusual to have a decrease in lifetime with temperature due to an increase in radiative rate. Normally, the decrease is due to an increase in nonradiative rate. The use of the europium ion as an indicator of changes in site symmetry with temperature has severe limitations. Abstract Full text PDF References Request permissions Open Access Label-Free Time-Resolved Monitoring of Photolipid Bilayer Isomerization by Plasmonic Sensing Jinhua Zhang, Francis Schuknecht, Ludwig Habermann, Alexander Pattis, Jonathan Heine, Stefanie D. Pritzl, Dirk Trauner, Theobald Lohmüller 2302266 First Published: 14 February 2024 Description unavailable Photoswitchable lipid azo-PC, which undergoes photoisomerization between trans and cis states by illumination of UV and blue light, enables optical control over membrane properties of supported lipid bilayers. Here, plasmonic nanorods are used as a label-free and highly sensitive tool to monitor the reversible photoisomerization dynamics of photolipid supported lipid bilayers. Abstract Full text PDF References Request permissions Coherent-Resonance Enhancement of Sensing at the Exceptional Points Jingming Chen, Qinnan Xie, Jingjing Zhang, Zhuo Li, Tie Jun Cui, Yu Luo 2302268 First Published: 28 February 2024 Description unavailable A coherent-resonance exceptional point (EP) sensor is demonstrated theoretically and experimentally by introducing coherent resonance between the whispering gallery microcavity and two external sub-wavelength resonators. Compared to previous noncoherent EP sensors, this system significantly improves the sensitivity without increasing the order of EP. This proposed strategy is fairly general and can be extended to optical frequencies and even other wave systems. Abstract Full text PDF References Request permissions Squaraine Dyes for Single-Component Shortwave Infrared-Sensitive Photodiodes and Upconversion Photodetectors Wei-Hsu Hu, Frank Nüesch, Davide Giavazzi, Mohammad Jafarpour, Roland Hany, Michael Bauer 2302105 First Published: 25 December 2023 Description unavailable Organic photodetectors usually utilize a donor-acceptor heterojunction to split excitons into charges. Here, for shortwave infrared-absorbing squaraine dyes, efficient, electric field-assisted photocurrent generation in single-component photodiodes is proven. Upconversion photodetectors are demonstrated by combining squaraine photodetectors with organic light-emitting diodes. Single-component squaraine-based upconversion photodetectors convert light up to 1300 nm directly into visible photons. Abstract Full text PDF References Request permissions Terahertz Cavity Magnon Polaritons T. Elijah Kritzell, Andrey Baydin, Fuyang Tay, Rodolfo Rodriguez, Jacques Doumani, Hiroyuki Nojiri, Henry O. Everitt, Igor Barsukov, Junichiro Kono 2302270 First Published: 20 December 2023 Description unavailable Strong photon–magnon coupling at frequencies above one terahertz is achieved. Terahertz time-domain spectroscopy, coupled with high magnetic fields, unveils anticrossing behavior between Fabry-Pérot cavity modes in a slab of NiO and its high-frequency antiferromagnetic resonance. The results are promising for exploring antiferromagnetic spintronics and cavity magnonics in the terahertz frequency range. Abstract Full text PDF References Request permissions Asymmetric Silicon Dimers Made by Single-Shot Laser-Induced Transfer Demultiplex Light of Different Wavelengths Dmitry V. Obydennov, Daniil A. Shilkin, Dmitry N. Gulkin, Evgeny V. Lyubin, Denis M. Zhigunov, Vladimir O. Bessonov, Andrey A. Fedyanin 2302276 First Published: 25 December 2023 Description unavailable The laser-induced transfer, when applied to silicon-on-insulator wafers, is shown to create pairs of silicon particles of different size. The dimers are characterized, their structural features and light scattering patterns are revealed. The observed scattering pattern asymmetry in visible wavelengths aligns with theoretical expectations, showcasing the potential of these silicon dimers for visible light color routing. Abstract Full text PDF References Request permissions Open Access Monitoring Acetone with Photoacoustic Spectroscopy Using a Metal–Organic Framework Yan Huang, Tie Zhang, Ting Xu, Zhen Peng, Yinghe Xu, Sailing He 2302280 First Published: 31 January 2024 Description unavailable A sample preconcentrator based on a metal–organic framework (MOF) of NH2-UIO-66@PDMS adsorbent is coupled to photoacoustic spectroscopy (PAS) technology for detecting of acetone. The preconcentrator apparatus not only enhance 11 times signal intensity only, but also prevent entering PA cell of common interferents from breath. Abstract Full text PDF References Request permissions Colorful Semitransparent Organic Photovoltaics with Record Key Parameters by Optimizing Photon Utilization and Fabry-Pérot Resonator Electrode Chunyu Xu, Zijin Zhao, Lixuan Kan, Sheng Tao, Xiaoling Ma, Xixiang Zhu, Kai Wang, Jian Zhang, Junming Li, Fujun Zhang 2302285 First Published: 07 December 2023 Description unavailable Blue, green, and red ST-OPVs based on PM6:L8-BO active layer are achieved by employing different Ag/LiF/Ag Fabry-Pérot resonator electrodes. The power conversion efficiency (PCE)/peak transmittance (Tpeak) values of the blue, green, and red ST-OPVs are individually 13.80%/37.8%, 13.31%/28.4%, and 13.20%/27.7% by optimizing photon utilization and Fabry-Pérot resonator electrode, which are among the best performance of reported colorful ST-OPVs. Abstract Full text PDF References Request permissions Enhanced Performance of Gallium-Based Wide Bandgap Oxide Semiconductor Heterojunction Photodetector for Solar-Blind Optical Communication via Oxygen Vacancy Electrical Activity Modulation Chao Wu, Tianli Zhao, Huaile He, Haizheng Hu, Zeng Liu, Shunli Wang, Fabi Zhang, Qinfeng Wang, Aiping Liu, Fengmin Wu, Daoyou Guo 2302294 First Published: 15 January 2024 Description unavailable By utilizing the N 2p-O 2p orbital hybridization, the valence band electron energy band structure is effectively modulated, suppressing the electrical activity of oxygen vacancies and sustaining the photoconductive effect. Abstract Full text PDF References Request permissions Near-Infrared Emission of Sm2+ in Oxynitrides Ying Lv, Yunkai Li, Zhongyuan Li, Rong-Jun Xie 2302303 First Published: 16 November 2023 Description unavailable A stable and broadband-excitable near-infrared oxynitride phosphor with an emitter of Sm2+ is developed, showing good thermal stability and water resistance, which enables it to be used in near-infrared spectroscopy technologies. Abstract Full text PDF References Request permissions Online Radiation Beam Tracking by Using Full-Inorganic Scintillating Fibers Shichao Lv, Feng Zhang, Xueliang Li, Tianzhi Jiang, Zhenlei Yang, Jin Li, Hongliang Zhu, Junpeng Guo, Jianrong Qiu, Shifeng Zhou 2302306 First Published: 12 February 2024 Description unavailable Scintillating fibers are employed to online monitoring for the spatial distribution of high-energy radiation. The fabrication of full-inorganic scintillating fibers using the melt-in-tube strategy offers significant advantages, including high sensitivity and minimal disturbance to the incident radiation. The application of these scintillating fibers in the construction of 2D and 3D radiation monitors enables precise tracking of spatial radiation beam distribution. Abstract Full text PDF References Request permissions Tailoring Fe3+-Activated Broadband NIR Phosphors: Enhancing External Quantum Efficiency and Spectrum Adjustability Through Crystal Field Engineering in Double Perovskite Antimonate Structures Xibao Zhang, Xiudi Wu, Yonghui Xu, Shuwen Yin, Chuansheng Zhong, Liang Zhou, Hongpeng You 2302300 First Published: 20 December 2023 Description unavailable Fe3+-activated double perovskite phosphors, A2BSbO6:yFe3+ (A = Ca, Sr, Ba; B = Sc, Y, Ga), efficiently converting light to near-infrared (NIR) emission is Synthesized. Tuning crystal field engineering allows peak adjustment (842–944 nm) and excitation spectra tuning (334–374 nm), matching commercial ultraviolet chips. Sr2ScSbO6:0.1%Fe3+ at 334 nm excitation exhibits high external quantum efficiency (EQE) (54.2%) and excellent thermostability (I423K/I298K = 81%), suitable for NIR spectral detection. Abstract Full text PDF References Request permissions