Cover Picture Free Access Full-Color Luminescence from Single-Component Hydrocarbon Crystal: RGB Emission by Altering Molecular Packing Under Pressure (Advanced Optical Materials 20/2023) Takeshi Nakagawa, Songhao Guo, Martina Vrankić, Philip Dalladay-Simpson, Kejun Bu, Dong Wang, Xia Yin, Ke Liu, Hongshan Deng, Jianbo Zhang, Chunsheng Xia, Yonggang Wang, Xujie Lü, Ho-kwang Mao, Yang Ding 2370078 First Published: 18 October 2023 Description unavailable Full-Color Luminescence from Single-Component Hydrocarbon Crystal: RGB Emission by Altering Molecular Packing Under Pressure In article number 2300586, Takeshi Nakagawa, Yang Ding, and co-workers show that by compression of a single-component pure organic single crystal of coronene, full-colour emission is exhibited, starting from blue at ambient conditions and covering the entire visible region. Full-color tuning is achieved by enhancing intermolecular interactions through altering the molecular packing of coronene, where the crystallographic symmetry change is closely related to the color of fluorescence. The first single-component hydrocarbon single crystal that realizes full-color piezochromic luminescence through flexible alterations of molecular packing is introduced. Abstract PDF Request permissions Inside Front Cover Free Access Turning Self-Trapped Exciton Emission to Near-Infrared Region in Thermochromism Zero-Dimensional Hybrid Metal Halides (Advanced Optical Materials 20/2023) Tianxin Bai, Xiaochen Wang, Yanmei He, Haiwen Wei, Yan Su, Junsheng Chen 2370079 First Published: 18 October 2023 Description unavailable Turning Self-Trapped Exciton Emission to Near-Infrared Region in Thermochromism Zero-Dimensional Hybrid Metal Halides In article number 2301110, Tianxin Bai, Junsheng Chen, and co-workers demonstrate a hybrid cation approach by using mixed organic-inorganic cations to develop a zero-dimensional metal halide with high thermal stability and solution processability, as well as multifunctional properties including thermochromic behavior and near infrared luminescence. Abstract PDF Request permissions Inside Back Cover Free Access Thermally Reversible On-Off Switching of Aggregation-Induced Emission via LCST Phase Transition of Ionic Liquids in Water (Advanced Optical Materials 20/2023) Hironobu Iwasawa, Daisuke Uchida, Yoichi Hara, Masaki Tanaka, Nobuhumi Nakamura, Hiroyuki Ohno, Takahiro Ichikawa 2370081 First Published: 18 October 2023 Description unavailable Thermally Reversible On-Off Switching of Aggregation-Induced Emission via LCST Phase Transition of Ionic Liquids in Water In article number 2301197, Takahiro Ichikawa and co-workers achieve on-off switching of aggregation-induced emission (AIE) in water by designing an ionic liquid composed of phosphonium cations and a tetraphenylethene-derived anion. The AIE is induced by the formation of ionic liquid microdroplets in water due to its ability to undergo a lower critical solution temperature phase transition. Abstract PDF Request permissions Back Cover Free Access Plasmonic Metasurfaces with Quality Factors Up to 790 in the Visible Regime (Advanced Optical Materials 20/2023) Guangyuan Li, Xiang Du, Lei Xiong, Xiuhua Yang 2370082 First Published: 18 October 2023 Description unavailable Plasmonic Metasurfaces with Quality Factors Up to 790 in the Visible Regime In article number 2301205, Guangyuan Li and co-workers demonstrate that by adopting short nanorods, plasmonic metasurfaces supporting lattice resonances under oblique incidence have significantly enhanced quality factors and near fields extending over large volumes, providing an exciting platform for ultrastrong light-matter interactions in diverse applications. Abstract PDF Request permissions Masthead Free Access Masthead: (Advanced Optical Materials 20/2023) 2370080 First Published: 18 October 2023 PDF Request permissions Perspective Open Access Revisiting the Definition of Solar Cell Generations Martina Schmid 2300697 First Published: 27 August 2023 Description unavailable The classification of solar cell technologies into generations is strengthened by updating the photovoltaic landscape with recent numbers for efficiencies and module prices. The proposed categorization is first generation crystalline silicon, second generation thin-film, and third generation solar cells capable of surpassing the Shockley–Queisser single-junction limit. From parallel trends between technologies, future trends may be derived. Abstract Full text PDF References Request permissions Reviews Full Access Recent Progress in Silicon-Based Photonic Integrated Circuits and Emerging Applications Zian Xiao, Weixin Liu, Siyu Xu, Jingkai Zhou, Zhihao Ren, Chengkuo Lee 2301028 First Published: 10 September 2023 Description unavailable Integrated photonics is a promising low-cost and mass-produced solution to a variety of technology areas. Similar to electronic integrated circuits, integrated photonic blocks are built up by many functional devices. Complex systems are all based on the fundamental building blocks to fulfill complex functions. By combining photonic chips and electronic chips, both can leverage and maximize their unique strengths. Abstract Full text PDF References Request permissions Full Access Mixed-Halide Inorganic Perovskite Solar Cells: Opportunities and Challenges Ming Yang, Huaxin Wang, Wensi Cai, Zhigang Zang 2301052 First Published: 23 August 2023 Description unavailable This review provides an analysis of the properties of CsPbI3−xBrx and delves deeply into the high-quality preparation of CsPbI3−xBrx films, examining phase segregation and interface engineering while emphasizing the critical role of interface modification. Due to their adjustable bandgap, CsPbI3−xBrx perovskite solar cells can serve as strong candidates for indoor photovoltaics, as they can better match the absorption range while exhibiting notable stability. Abstract Full text PDF References Request permissions Research Articles Full Access Full-Color Luminescence from Single-Component Hydrocarbon Crystal: RGB Emission by Altering Molecular Packing Under Pressure Takeshi Nakagawa, Songhao Guo, Martina Vrankić, Philip Dalladay-Simpson, Kejun Bu, Dong Wang, Xia Yin, Ke Liu, Hongshan Deng, Jianbo Zhang, Chunsheng Xia, Yonggang Wang, Xujie Lü, Ho-kwang Mao, Yang Ding 2300586 First Published: 30 August 2023 Description unavailable The optical properties of coronene nano-rods are systematically investigated at high pressure. Under UV light, it exhibits blue emission at ambient pressure. During compression, the emission color changes to green, yellow, and red, with the emission enhancement leading to the most intense green emission. This study finds the first single-component crystal that achieves full-color piezochromic luminescence through flexible alterations of molecular packing. Abstract Full text PDF References Request permissions Open Access Turning Self-Trapped Exciton Emission to Near-Infrared Region in Thermochromism Zero-Dimensional Hybrid Metal Halides Tianxin Bai, Xiaochen Wang, Yanmei He, Haiwen Wei, Yan Su, Junsheng Chen 2301110 First Published: 14 July 2023 Description unavailable A new class of thermochromism zero dimensional hybrid metal halides (DFPD)3BiI6 and (DFPD)2CsBiI6 (DFPD = 4,4-difluoropiperidinium) is reported here. (DFPD)2CsBiI6:Sb not only preserves the original thermochromic property, but also shows self-trapped exciton emission at the near-infrared (NIR) region. Hence, (DFPD)2CsBiI6:Sb shows multifunctional applications such as thermochromic anti-counterfeiting, photoelectric detection, and NIR imaging. Abstract Full text PDF References Request permissions Full Access Thermally Reversible On-Off Switching of Aggregation-Induced Emission via LCST Phase Transition of Ionic Liquids in Water Hironobu Iwasawa, Daisuke Uchida, Yoichi Hara, Masaki Tanaka, Nobuhumi Nakamura, Hiroyuki Ohno, Takahiro Ichikawa 2301197 First Published: 03 August 2023 Description unavailable On-off switching of aggregation-induced emission (AIE) in water is achieved by designing an ionic liquid composed of phosphonium cations and a tetraphenylethene-derived anion. The AIE is induced by the formation of ionic liquid microdroplets in water because of its ability to undergo a lower critical solution temperature phase transition with a slight change in temperature. Abstract Full text PDF References Request permissions Full Access Plasmonic Metasurfaces with Quality Factors Up to 790 in the Visible Regime Guangyuan Li, Xiang Du, Lei Xiong, Xiuhua Yang 2301205 First Published: 03 August 2023 Description unavailable For plasmonic metasurfaces supporting out-of-plane surface lattice resonances, the quality factors can be augmented by an order of magnitude via reducing the nanorod height by half, from 100 to 50 nm, and can reach as high as ≈ 1500 in theory or 790 in experiments in the visible regime. Abstract Full text PDF References Request permissions Full Access Ultrafast Polarization Sensitive Photodetector Based on MoS2/Ta2Pd3Se8 Hybrid Dimensional Heterostructure Shenggang Ke, Jiayuan Zhou, Konstantin V. Larionov, Ankang Zhu, Ying Li, Hui Zhang, Yang Yang, Xiangde Zhu, Liang Li, Pavel B. Sorokin, Mingliang Tian, Wenshuai Gao, Xue Liu 2300593 First Published: 04 June 2023 Description unavailable A hybrid dimensional van der Waals photodiode with type-I band alignment design is proposed for high performance photodetection. The device shows high efficiency and ultrafast optical response with an external quantum efficiency and response speed of 970% and 1.3 µs, respectively. Besides, the 2D/1D structure introduces a highly polarized-sensitive functionality with an anisotropic ratio up to 0.66. Abstract Full text PDF References Request permissions Full Access In-Plane Integrating Unidirectional 1D CsPbBr3 Waveguide Arrays with Heterogeneous Semiconductor Wires for Photonic Integrated Circuits Sha Jiang, Xing Xu, Chao Fan, Long Chen, Lei Shen, Qi Deng, Xue Xia, Qinglin Zhang 2300596 First Published: 15 June 2023 Description unavailable In-plane unidirectional CsPbBr3 wire arrays are integrated with dissimilar semiconductor wires on mica substrates through a two-step vapor phase deposition method. The CsPbBr3 wires can work as both light emitting media and waveguides, which increases the light absorption in the backbone wires. The waveguide/Sb2Se3 wire photodetector system exhibits efficient and rapid photoresponse to modulated 405 nm light pulses. Abstract Full text PDF References Request permissions Full Access “Cation Activation”: An Effective Strategy for the Enhancement of Birefringence Chenhui Hu, Mengfan Wu, Miao Zhang, Jian Han, Xueling Hou, Feng Zhang, Zhihua Yang, Shilie Pan 2300579 First Published: 12 May 2023 Description unavailable The design strategy “Cation Activation” is proposed and verified by the experimental results. [C(NH2)3]2[B4O5(OH)4]·H2O exhibits a markedly enlarged birefringence, which is about 2.75 times that of α-Rb2[B4O5(OH)4]·H2O because of the activated cation. Abstract Full text PDF References Request permissions Open Access Plasmonic Nanopyramid Array Enhancing Luminescence of MoS2 Investigated by Cathodoluminescence Dung Thi Vu, Nikolaos Matthaiakakis, Takumi Sannomiya 2300598 First Published: 01 June 2023 Description unavailable By utilizing a scanning transmission electron microscopy cathodoluminescence technique, a local emission enhancement is experimentally mapped with nanometer spatial resolution, demonstrating luminescence enhancement of MoS2 that is optically coupled to a plasmonic gold nanopyramid array. Abstract Full text PDF References Request permissions Full Access Precisely Manipulating the Self-Reduction of Manganese in MgGa2O4 through Lithium Incorporation for Optical Thermometry and Anti-Counterfeiting Junpeng Xue, Ling Li, Marcin Runowski, Yue Guo, Bo Ram Lee, Jung Hyun Jeong, Peng Du, Sung Heum Park 2300600 First Published: 09 June 2023 Description unavailable The incomplete self-reduction behavior of Mn is detected and inhibited by the incorporation of Li+, leading to the precise regulation of Mn2+ and Mn4+ contents in MgGa2O4 host lattices. The mechanism is triggered by Li+ occupying the tetrahedral Mg2+ site, reducing occupancy of tetrahedral Mg2+ sites by Mn ions and forcing Mn to take up the octahedral Ga3+ sites. Abstract Full text PDF References Request permissions Full Access Applying 2DEG in High-Performance Mid-Infrared Photodetection Hanlun Xu, Yao Wang, Jinbo Shen, Ziyang Ren, Jiaqi Zhu, Yansong Chen, Mengjuan Liu, Yihui Zhai, Yunhao Lu, Yong Zhang, Shiyao Zhu, Sihan Zhao, Huizhen Wu 2300602 First Published: 11 June 2023 Description unavailable A novel mid-infrared photodetector based on 2D electron gas (2DEG) is fabricated. Rapid photoresponse, low noise, and high detectivity are simultaneously achieved by ultrafast photogenerated electron relaxation and high-mobility 2DEG transport due to the unique band alignment at the CdTe/PbTe interface. The detectivity exceeding 1011 Jones with a response time of ≈19 ns achieved is superior to other 2DEG mid-infrared detectors. Abstract Full text PDF References Request permissions Full Access Radical Afterglow Emission Harnessed by Doping N,N’-Diaryl-5,10-Dihydrophenazines to Epoxy Resins Yonghao Su, Xin Jin, Jianhua Su, Yanli Feng, Qiaochun Wang, Zhiyun Zhang, He Tian, Xiang Ma 2300604 First Published: 26 May 2023 Description unavailable A radical afterglow emission (up to 4 s) harnessed by doping N,N’-diaryl-5,10-dihydrophenazines (dopants) into cycloaliphatic epoxy resins (matrix) is reported. The afterglow is related to the radical species produced by the interaction between the matrix and the dopants under continuous UV excitation. Quantum-chemical calculations predict that inefficient spin-orbit coupling (SOC) coefficients may hinder the afterglow emission by inhibiting the ISC process. Abstract Full text PDF References Request permissions Full Access Robust Sulfate Anion Passivation for Efficient and Spectrally Stable Pure-Red CsPbI3−xBrx Nanocrystal Light-Emitting Diodes Xue-Chen Ru, Jun-Nan Yang, Jing Ge, Li-Zhe Feng, Jing-Jing Wang, Kuang-Hui Song, Tian Chen, Zhen- Yu Ma, Lian-Yue Li, Hong-Bin Yao 2300606 First Published: 21 June 2023 Description unavailable Mixed halide CsPbI3−xBrx nanocrystals via strongly coordinated sulfate passivation are promising to achieve highly efficient and spectrally stable pure red perovskite light-emitting diodes, showing a narrow electroluminescent full width at half maximum of 27 nm centered at 630 nm, high maximum brightness of 5000 cd m−2 and high maximum external quantum effficiency of 12.6%. Abstract Full text PDF References Request permissions Full Access High-Throughput Fabrication of Curved Plasmonic Metasurfaces for Switchable Beam Focusing and Thermal Infrared Cloaking Jintao Gong, Lingxing Xiong, Mingbo Pu, Yifeng Wen, Jixiang Cai, Xingdong Feng, Rui Pan, Qiong He, Yinghui Guo, Nan Chi, Xiaoliang Ma, Xiong Li, Xiangang Luo 2300608 First Published: 09 July 2023 Description unavailable The feasibility of applying curved metasurfaces for continuous focal length adjustment and thermal infrared cloaking functions through design, theory, simulation, fabrication, and experimentation is demonstrated. It is believed that the broad tuning range of focal length with continuous tunability and the thermal infrared cloaking feature of its flexible plasmonic metasurfaces can find extensive applications in microscopy, lightweight zoom cameras, mixed reality, and light detection and ranging (LIDAR). Abstract Full text PDF References Request permissions Full Access Deep-Red InP Core-Multishell Quantum Dots for Highly Bright and Efficient Light-Emitting Diodes Pan Huang, Xiaonan Liu, Geyu Jin, Fangze Liu, Huaibin Shen, Hongbo Li 2300612 First Published: 17 June 2023 Description unavailable InP/ZnSe/ZnSeS/ZnS core-shell quantum dots (QDs) with deep-red photoluminescence emission at 680 nm and 95% photoluminescence quantum yield (PLQY) are synthesized. The ZnSeS transition layer enhances the stability and PLQY of InP core-shell QDs by reducing the lattice mismatch and interfacial defects. The deep-red InP quantum-dot light-emitting diode (QLED) shows 2263 cd m−2 brightness and 6.5% external quantum efficiency at 683 nm. This work promotes the development of deep-red QLEDs for lighting and display applications. Abstract Full text PDF References Request permissions Full Access A Spot Ionogel for Visual Early-Warning of Illegal Lead Concentrations Coupling Inorganic Perovskite Crystallization and Photoluminescence Jie Fu, Lei Zhang, Jia-Ying Liu, Guo-Hao Zhang, Shuang-Long Wang, Qiu-Hong Zhu, Song Qin, Ling He, Guo-Hong Tao 2300617 First Published: 18 August 2023 Description unavailable A PVA/C6mimBr/CsBr ionogel-based (PCCI) device is prepared for the early-warning of illegal concentrations of Pb(II) ions in the environment, through the coupling strategy of inorganic perovskite Cs4PbBr6 crystallization and photoluminescence. The strategy could offer a new platform for developing easy-to-use and frugal sensors for on-site early-warning of hazard pollution in line with laws and regulations. Abstract Full text PDF References Request permissions Full Access Tuning Oxygen Vacancy in CaZnOS through Cation Substitution for Substantially Enhanced Multimode Luminescence of Mn2+ and Tb3+ Zhihao Wang, Bohan Wang, Xiping Zeng, Dengfeng Peng, Yu Wang 2300623 First Published: 07 June 2023 Description unavailable Significant mechanoluminescence, photoluminescence, and X-ray excited optical luminescence enhancement of CaZnOS:Mn2+/Tb3+ are obtained after Sr2+ substitution. The lattice distortion of CaZnOS originating from Sr2+ incorporation can efficiently promote the elimination of oxygen elements and simultaneously produce more oxygen vacancies in the matrix, which can effectively fortify the trapped electrons and ultimately promote stronger luminescence. Abstract Full text PDF References Request permissions Full Access Quaternary AgInP2S6: A Prospective Robust van der Waals Semiconductor for High-Speed Photodetectors and their Application in High-Temperature-Proof Optical Communications Qiaojue Ye, Zexiang Deng, Huaxin Yi, Wan Wang, Jianting Lu, Yuhang Ma, Wenjing Huang, Zhaoqiang Zheng, Churong Ma, Chun Du, Yichao Zou, Jiandong Yao, Guowei Yang 2300463 First Published: 19 May 2023 Description unavailable A high-speed and high-temperature durable photodetector based on a novel quaternary 2D layered material, silver indium phosphorus sulfide (AgInP2S6), is demonstrated in this study. A proof-of-concept high-temperature optical communication application is demonstrated, revealing great potency toward extreme working environments. Abstract Full text PDF References Request permissions Full Access Inorganic “Artificial Phase” CdSe/ZnS QDs Serve as the Host Material for White Emission Quasi-2D Perovskite Light Emitting Devices Wenbo Liu, Zhengyan Jiang, Pai Liu, Kai Wang, Baomin Xu, Guoping Wang, Xiao Wei Sun 2300631 First Published: 09 June 2023 Description unavailable Inorganic CdSe/ZnS quantum dots (QDs), as the artificial phase, can work as the host material for white emission quasi-2D perovskite light emitting devices (PeLEDs). An efficient ““artificial phase” CdSe/ZnS QDs→multi PEAxAyPbI2+x+y phases” energy transfer path is built and can assist the energy transfer inside the quasi-2D perovskite layer to achieve better device performance. Abstract Full text PDF References Request permissions Full Access Chiral Opto-Fluidics and Plasmonic Nanostructures as a Functional Nanosystem for Manipulating Surface Deformations Cuiping Ma, Artur Movsesyan, Zhimin Jing, Yisong Zhu, Peihang Li, Wenhao Wang, Alina Muravitskaya, Alexander O. Govorov, Zhiming Wang 2300645 First Published: 14 July 2023 Description unavailable A chiral metal-insulator-metal structure is designed to realize the photoinduced liquid asymmetric deformation under circularly polarized light irradiation. The physical mechanism of this new phenomenon is based on chiral photothermal and optofluidic effects. The surface tension of water decreases with increasing temperature, and finally a maximum depression depth of about 35 nm is obtained. Abstract Full text PDF References Request permissions Full Access Application of 2D Polyoxometalate Clusterphene in a High-Performance Photoelectrochemical Photodetector Xinyi Zhang, Karim Khan, Ayesha Khan Tareen, Ye Zhang 2300646 First Published: 25 June 2023 Description unavailable The new two-dimensional (2D) polyoxometalate clusterphene (POMCene) with a similar hexagonal structure to graphene is synthesized and applied for photoelectrochemical (PEC)-type photodetection for the first time. Such a 2D POMCene-based photodetector shows good photodetection capability and excellent long-term stability (over 3 months) in a harsh environment, indicating the great potential of 2D POMCene for practical applications. Abstract Full text PDF References Request permissions Full Access Mn2+ as an “Optical Energy Shutter” to Regulate Red-to-NIR Luminescence in Rare Earth Doped Layered Quadruple Perovskites Wei Yang, Peipei Dang, Guodong Zhang, Hongzhou Lian, Ziyong Cheng, Guogang Li, Jun Lin 2300468 First Published: 17 May 2023 Description unavailable The schematic illustration of a Mn2+ energy bridge resembles an “optical energy shutter” which produces VIS—NIR (near-infrared) (500–1650 nm) ultrabroadband emission when combining with RE3+ (RE = Nd, Dy, Ho, Er, Tm, Yb) dopant in Cs4Cd1−xMnxSb2Cl12 but quenches the NIR emission in RE3+-doped (RE = Dy, Yb, Ho, Er) Cs4Cd0.4Mn0.6Sb2−yBiyCl12 through bandgap engineering. Abstract Full text PDF References Request permissions Full Access Bridging Chloride Anions Enables Efficient and Stable InP Green Quantum-Dot Light-Emitting Diodes Qianqian Wu, Lin Wang, Fan Cao, Sheng Wang, Lufa Li, Guohua Jia, Xuyong Yang 2300659 First Published: 05 May 2023 Description unavailable A bridge between InP quantum dots (QDs) and the ZnMgO electron transport layer (ETL) is created using Cl−, which can transfer to the surface of the QDs via ligand exchange to replace organic ligands and passivate oxygen vacancy defects in ZnMgO. The resulting QLED has a peak external quantum efficiency (EQE) of 13.8% and an operational lifetime of 5944 h. Abstract Full text PDF References Request permissions Full Access Metasurface-Based Free-Space Multi-Port Beam Splitter with Arbitrary Power Ratio Tian Tian, Yuxuan Liao, Xue Feng, Kaiyu Cui, Fang Liu, Wei Zhang, Yidong Huang 2300664 First Published: 09 June 2023 Description unavailable A free-space optical multi-port beam splitter (MPBS) with arbitrarily predetermined port number, power ratio, and spatial distribution of output beams is demonstrated. By applying an optimized phase-pattern paradigm via a gradient-descent-based iterative algorithm to dielectric metasurfaces, various types of MPBS samples are prepared. The experimental results reveal that high beam-splitting efficiency and fidelity within 100 nm bandwidth are achieved. Abstract Full text PDF References Request permissions Full Access Bio-Inspired Homologous Magnesium-Based Reflective Filters with Angular Heterochromatic Structural Colors Yu Bu, Weihui Ou, Xiuming Bu, Xufen Xiao, Yingxian Chen, Zhengyi Mao, Jian Lu 2300674 First Published: 09 July 2023 Description unavailable Inspired by the structure of a beetle forewing, angularly heterochromatic structural colors with an asymmetric Fabry–Perot cavity are constructed by homologous magnetron sputtering, with high color saturation and stable mechanical properties. The ultrahigh-performance parameters are determined by the interference of the reflective layer with an amorphous structure and its oxide and the absorbing island layer with a controllable structure. Abstract Full text PDF References Request permissions Open Access Cellulose-Assisted Formation of 2D Hybrid Halide Perovskite Nanocrystals with Enhanced Stability for Light-Emitting Devices Susana Ramos-Terrón, Lea Spitzer, Cristina Martín, Eduardo Solano, Daniel Hermida-Merino, Sébastien Lecommandoux, François Jérôme, Henri Cramail, Pablo G. Argudo, Gustavo de Miguel 2300676 First Published: 14 July 2023 Description unavailable The addition of a large amount of β-(1,4) cellulose oligosaccharide (20 wt.%) to metal halide perovskites (MHPs) layers causes a reduction of the perovskite grains to the nanometer scale (30–40 nm) together with a 14-fold increase of the photoluminescence quantum yield (PLQY). Thefabricated perovskite light emitting devices (PeLEDs) with the cellulose additive display both enhanced luminance and stability. Abstract Full text PDF References Request permissions Full Access Bandgap Engineering for Ultralow-Voltage Operation of Organic Light-Emitting Diodes Chinatsu Satoh, Takuya Okada, Taku Oono, Tsubasa Sasaki, Takahisa Shimizu, Hirohiko Fukagawa 2300683 First Published: 19 May 2023 Description unavailable A simple equation describing the minimum voltage required for organic light-emitting diode (OLED) operation is derived from the characteristics of OLEDs consisting of only electron-donating and electron-accepting molecules. The novel molecules suitable for the ultralow-voltage operation of OLEDs are designed on the basis of this equation, and blue and green OLEDs that emit light at about 1.5 V are realized. Abstract Full text PDF References Request permissions Full Access Improving Photovoltaic Performance and Stability of Perovskite Solar Cells via Molecular Bridge Strategy Yinrun Yang, Tingting Wei, Xuxia Shai, Qinghe Song, Chunhua Zeng, Dongmei He, Hong Zhang, Jiangzhao Chen 2300684 First Published: 18 June 2023 Description unavailable A self-assembly molecule (5-FPA) is used as the “chemical bridge” to modify the SnO2/perovskite buried interface. The division of functional groups at both ends of 5-FPA has realized not only the bilateral synergistic passivation in buried interfaces but also the ordered arrangement of 5-FPA molecules. Abstract Full text PDF References Request permissions Full Access Multi-Band Polarization-Independent Quasi-Bound States in the Continuum Based on Tetramer-Based Metasurfaces and Their Potential Application in Terahertz Microfluidic Biosensing Jifei Ding, Lirong Huang, Yi Luo, Tianwu Wang, Jinkang Hu, Runze Li, Shiyi Xiao 2300685 First Published: 25 June 2023 Description unavailable A multi-band polarization-independent quasi-bound state in the continuum based on tetramer-based metasurfaces in the terahertz band is proposed and experimentally demonstrated by using the laser etching method, which can provide multiple resonance windows with high Q factors under any polarization state. Furthermore, the fabricated metasurfaces are integrated with microfluidic channels to explore their potential application in terahertz microfluidic biosensing. Abstract Full text PDF References Request permissions Open Access Suppressing Degradation in QLEDs via Doping ZnO Electron Transport Layer by Halides Dong Seob Chung, Quan Lyu, Giovanni F. Cotella, Peter Chun, Hany Aziz 2300686 First Published: 20 June 2023 Description unavailable Incorporating I2 and FeCl3 as dopants into a ZnO electron transport layer increases the LT50 of a quantum-dot light-emitting device by 2.2× and 3.6×, respectively, compared to undoped ZnO. This work reveals a link between device stability and the concentration of ZnO species with higher oxidative states. The use of these dopants reduces the accumulation of positive charges in ZnO. Abstract Full text PDF References Request permissions Full Access Enhanced Förster Energy Transfer Through Horizontal Orientation of Sensitizer Molecules in Hyperfluorescent Organic Light-Emitting Diodes Junseop Lim, Kyu Young Hwang, Seung-Yeon Kwak, Sung Min Cho, Jae-Min Kim, Jun Yeob Lee 2300672 First Published: 01 June 2023 Description unavailable The effect of relative orientation on the Förster resonance energy transfer rate between the sensitizer and emitting dopant is investigated in phosphor-sensitized fluorescence-based organic light-emitting diodes. A geometrical model for the relative orientation is established in which the prediction map is based on the horizontal emitting dipole orientations of the donor and acceptor. Abstract Full text PDF References Request permissions Full Access Simultaneously Achieving Multicolor Emission of Down-Shifting and Up-Conversion in Yb3+, Er3+ -Codoped Cs2NaGdCl6 Double Perovskites Haiyan Wang, Jiandong Yao, Qilin Wei, Jialong Zhao, Bingsuo Zou, Ruosheng Zeng 2300694 First Published: 17 August 2023 Description unavailable Yb3+, Er3+-codoped Cs2NaGdCl6 double perovskites with multiple emission modes under ultraviolet and near-infrared excitation are developed. A cross relaxation strategy is employed to achieve tunable up-conversion and down-shifting luminescence color. Consequently, the combination of up-conversion and down-shifting luminescence, along with the ability to modulate emission color in rare-earth-based materials, opens new possibilities for high security anti-counterfeiting applications. Abstract Full text PDF References Request permissions Full Access Study of the Photoluminescence Enhancement Observed in ZnO Nanowire Gratings Optimally Grown by the Hydrothermal Method Aubry Martin, Audrey Potdevin, François Réveret, Emmanuel Centeno, Rafik Smaali, Fatima Omeis, David Riassetto, Elena Kachan, Yves Jourlin, Geneviève Chadeyron, Michel Langlet 2300695 First Published: 02 July 2023 Description unavailable Original ZnO nanowires (NWs)-based architectures have been developed, entirely based on a soft chemistry approach. The orange–red light emitted by the NWs under UV radiation is considerably influenced by NW gratings acting as coupled microcavities. These ones strongly enhance the extraction of light in a selective range of emission angles, between 50 and 70° compared with NW coatings. Abstract Full text PDF References Request permissions Rising Stars Open Access Light-Driven Thermo-Optical Effects in Nanoresonator Arrays Alfredo Naef, Ershad Mohammadi, Ted V. Tsoulos, Giulia Tagliabue 2300698 First Published: 07 September 2023 Description unavailable Thermo-optical effects triggered by light absorption in dielectric nanoresonators have the potential to enable thermally reconfigurable and non-reciprocal metasurfaces. This work clarifies the complex interplay of self-heating, collective heating, and thermo-optical effects in shaping the temperature profile of multi-dimensional arrays of Silicon nanoresonators. In particular, it shows the possibility of engineering non-trivial temperature profiles towards the realization of thermonanophotonic devices. Abstract Full text PDF References Request permissions Full Access Arbitrary Optical Wavefront Shaping with Holographic Plasmonic Gap Waveguides Guang Zhu Zhou, Bao-Jie Chen, Geng-Bo Wu, Shi-Wei Qu, Chi Hou Chan 2300701 First Published: 29 June 2023 Description unavailable Optical wavefront shaping can be achieved by amplitude-modulated plasmonic gap waveguides. A range of free-space functions are designed and experimentally verified, such as single/dual beams, focusing beams, and Airy beam generation. This study opens a new route for optical wavefront shaping via modulating guided waves, paving the way for optical interconnects across multifunctional photonic integrated devices and free space. Abstract Full text PDF References Request permissions Full Access Multi-Type Topological States in Higher-Order Photonic Insulators Based on Kagome Metal Lattices Liyun Tao, Yahong Liu, Xin Zhou, Lianlian Du, Meize Li, Ruonan Ji, Kun Song, Xiaopeng Zhao 2300986 First Published: 17 August 2023 Description unavailable Multi-type topological states in higher-order photonic topological insulators are demonstrated based on Kagome metal lattices. Two types of topological insulators are obtained by stretching or rotating Kagome metal lattices. Besides, dual-band higher-order valley-Hall topological insulators are acheived with nodal ring degeneracy. The present topological insulators provide an unconventional approach to explore photonic systems and condensed matter physics. Abstract Full text PDF References Request permissions