Article
Chemistry, Multidisciplinary
Lianghui Gu, Mengmeng Li, Jingya Lai, Dongmin Qian, Kaichuan Wen, Lei Xu, Gang Wang, Shuzhen Guan, Yuyang Zhang, Xinyu Huang, Jingjing Zhao, Guichuan Xing, Nana Wang, Lin Zhu, Qiming Peng, Wei Huang, Jianpu Wang
Summary: By regulating the crystallization of a NIR quasi-2D perovskite using an 18-crown-6 additive, a compact and smooth film with greatly improved carrier cascade efficiency was obtained. By combining the film with a high-quality distributed feedback grating, a CW NIR laser of 809 nm at 110 K was successfully realized, with a high Q-factor of 4794 and a low threshold of 911.6 W cm(-2). These findings provide an important foundation for achieving electrically pumped laser diodes based on the unique quasi-2D perovskites.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Ryotaro Nasu, Xun Tang, Satoru Watanabe, Chathuranganie A. M. Senevirathne, Ganbaatar Tumen-Ulzii, Toshinori Matsushima, Chihaya Adachi
Summary: Films based on 1-naphthylmethylamine (NMA) quasi-2D perovskite exhibit low lasing thresholds and small efficiency rolloff, making them promising for both optically pumped and electrically pumped lasing. The low threshold is attributed to the absence of bright exciton quenching and the shallow defect levels, which decrease nonradiative exciton recombination. The use of a circular-shaped optical resonator and small-molecule-based defect passivation further reduces the lasing threshold to one of the lowest values reported for perovskite lasers.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Yang Li, Julie Roger, Isabel Allegro, Jan C. Fischer, Qihao Jin, Uli Lemmer, Ian A. Howard, Ulrich W. Paetzold
Summary: Planar heterostructures have been widely used in III-V semiconductor lasers but have not yet been explored for perovskite gain media. This study investigates the gain performance of a CsPbBr3(BABr)(x)/CsPbBr3 perovskite planar heterostructure fabricated by lamination. The results show that the heterostructure achieves low ASE threshold and lasing threshold, and modeling suggests that further improvement is possible by maximizing excited-state transfer efficiency. This study highlights the potential of perovskite planar heterostructures as high-performance gain media.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Kaichuan Wen, Yu Cao, Lianghui Gu, Saixue Wang, Dongmin Qian, Jingmin Wang, Zhiyuan Kuang, Mengyi Luo, Gang Wang, Shuzhen Guan, Mengmeng Li, Heng Yang, Guichuan Xing, Nana Wang, Lin Zhu, Qiming Peng, Wei Huang, Jianpu Wang
Summary: Continuous-wave lasing is achieved in an efficient perovskite LED with an integrated distributed feedback resonator, showing a low threshold at low temperature. The LED functions well even at high current density, suggesting the potential realization of electrically pumped perovskite laser diodes.
ADVANCED MATERIALS
(2023)
Review
Chemistry, Physical
Alessandro Caiazzo, Rene A. J. Janssen
Summary: This review discusses the toolbox and methods used for high efficiency solar cells based on Ruddlesden-Popper perovskites.
ADVANCED ENERGY MATERIALS
(2022)
Article
Optics
Colton Fruhling, Kang Wang, Sarah Chowdhury, Xiaohui Xu, Jeffrey Simon, Alexander Kildishev, Letian Dou, Xiangeng Meng, Alexandra Boltasseva, Vladimir M. Shalaev
Summary: Coherent random lasing in subwavelength quasi-2D perovskite films is observed and studied. Statistical analysis reveals Levy-like intensity fluctuations, replica symmetry breaking confirms random lasing, and spectral and spatial correlation techniques are used to study coherent modes. The observed coherent lasing modes are extended states that result from the random crystal grain structure during fabrication and out-compete diffusive lasing due to their coherence.
LASER & PHOTONICS REVIEWS
(2023)
Article
Chemistry, Multidisciplinary
Boxin Wang, Qian Cheng, Gaosheng Huang, Yaochang Yue, Weichuan Zhang, Xing Li, Yanxun Li, Wenna Du, Xinfeng Liu, Hong Zhang, Yuan Zhang, Huiqiong Zhou
Summary: The effects of sulfonium cations on the evolution of intermediates and photovoltaic properties of 2D RP perovskites were investigated. The introduction of sulfonium cations led to preferred intermediate transformation and improved film quality of perovskites, resulting in enhanced efficiency and stability of solar cells.
ADVANCED MATERIALS
(2023)
Review
Optics
Li Zhang, Changjiu Sun, Tingwei He, Yuanzhi Jiang, Junli Wei, Yanmin Huang, Mingjian Yuan
Summary: Quasi-2D perovskites have superior semiconducting properties and outstanding optical characteristics due to their structural characteristics. The inherent quantum-well structure gives them a large exciton binding energy, resulting in high PLQY.
LIGHT-SCIENCE & APPLICATIONS
(2021)
Article
Chemistry, Multidisciplinary
Xiaolong Liu, Kang Wang, Ang Ren, Tongjin Zhang, Shizhe Ren, Jiannian Yao, Haiyun Dong, Yong Sheng Zhao
Summary: A metal-linking approach is proposed to enhance the Raman gain of organic molecules, allowing for continuous-wave (c.w.) organic lasers. Broadband tunable Raman lasing is achieved by adjusting excitation wavelengths.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Xiaolong Liu, Kang Wang, Ang Ren, Tongjin Zhang, Shizhe Ren, Jiannian Yao, Haiyun Dong, Yong Sheng Zhao
Summary: Stimulated Raman scattering offers an alternative strategy for continuous-wave (c.w.) organic lasers, but suffers from inadequate Raman gain in organic material systems. In this study, a metal-linking approach is proposed to enhance the Raman gain of organic molecules. Self-assembled microcrystals of metal-linked organic dimers exhibit large Raman gain, enabling c.w. Raman lasing. Broadband tunable Raman lasing is achieved in the organic dimer microcrystals by adjusting excitation wavelengths. The work contributes to the understanding of Raman gain in organic molecules and provides a pathway for designing c.w. organic lasers.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Max J. H. Tan, Jeong-Eun Park, Francisco Freire-Fernandez, Jun Guan, Xitlali G. Juarez, Teri W. Odom
Summary: Research demonstrates that quasi-propagating modes at high symmetry points can achieve lasing action over a continuous range of wavelengths, offering possibilities for engineering chromatic multibeam emission.
ADVANCED MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Tingwei Zhou, Anlong Kuang
Summary: The study systematically investigated the properties of a quasi-2D lead-free perovskite, revealing its negative formation energy, stable dynamic performance, suitable exciton binding energy, and direct band gap, making it potentially suitable for application in red-light-emitting diodes.
Article
Chemistry, Multidisciplinary
Dengxue Li, Zhi Xing, Lu Huang, Xiangchuan Meng, Xiaotian Hu, Ting Hu, Yiwang Chen
Summary: By incorporating hydrophobic 4TFBZA into MAPbI(3), highly efficient and stable quasi-2D hybrid perovskite solar cells have been successfully demonstrated. The structure can effectively passivate trap states, restrain ion motion, suppress perovskite decomposition, and improve both thermal and moisture stability.
ADVANCED MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Xun Sun, Xinmin Shi, Weiguang Zhang, Baoyuan Xu, Zhenhua Gao, Zifei Wang, Xue Wang, Xiangeng Meng
Summary: Phase transformation between metal halide perovskites offers a promising route to create new optoelectronic functionalities, with improved water resistance and photoluminescence performance. The derived 2D/3D heterostructures exhibit random lasing characteristics, serving as a promising platform for nanophotonic applications.
Article
Chemistry, Physical
Sudhakar Narra, Chia-Yi Lin, Ashank Seetharaman, Efat Jokar, Eric Wei-Guang Diau
Summary: This study investigated the dynamics of exciton and free-carrier relaxation in low-dimensional tin iodide perovskites using femtosecond transient absorption spectra. The results show that samples of different dimensions exhibit different exciton and free-carrier characteristics, with variations in carrier relaxation dynamics.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Article
Materials Science, Multidisciplinary
Bing Chen, Dengfeng Peng, Pin Lu, Zhipeng Sheng, Keyu Yan, Yu Fu
Summary: Mechanoluminescence (ML) sensors provide full-field strain/stress measurements with easy implementation, non-invasiveness, and low cost. The mechanism of carrier detrapping due to mechanical forces is not well understood, and developing calibration models for ML sensors under static or quasi-static loading rates is a challenge. This study built a real-time measurement system to evaluate the constitutive strain-luminescence relationship of ML sensors and successfully predicted ML responses under variable loading rate conditions using a modified model.
MATERIALS & DESIGN
(2023)
Review
Chemistry, Multidisciplinary
Zefeng Huang, Bing Chen, Biyun Ren, Dong Tu, Zhaofeng Wang, Chunfeng Wang, Yuantian Zheng, Xu Li, Dong Wang, Zhanbing Ren, Sicen Qu, Zhuyang Chen, Chen Xu, Yu Fu, Dengfeng Peng
Summary: This paper provides a systematic review on the mechanoluminescence phenomena, mechanisms, material synthesis techniques, and related applications of strontium-aluminate-based luminescent materials. These materials exhibit a low threshold of mechanoluminescence, efficient photoluminescence, and persistent afterglow, making them suitable for applications in visible strain sensing and structural health monitoring.
Article
Materials Science, Multidisciplinary
Leipeng Li, Jingjing Ning, Chongyang Cai, Zheng Zhu, Yixiao Han, Yuantian Zheng, Dengfeng Peng, Jianrong Qiu, Yanmin Yang
Summary: In this study, a solid and novel ML thermometry framework is established using CaZnOS:Er3+ material and the well-established Boltzmann distribution. The utility of this framework is demonstrated and potential applications in anti-counterfeiting and information encryption are discussed, providing a foundation for future ML applications.
SCIENCE CHINA-MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Minzhong Li, Yahong Jin, Lifang Yuan, Bo Wang, Haoyi Wu, Yihua Hu, Feng Wang
Summary: The advent of near-infrared (NIR) afterglow in Cr3+-doped materials has generated significant interest for technological applications. However, the development of Cr3+-free NIR afterglow phosphors with high efficiency, low cost, and precise spectral tunability remains a challenge. In this study, a Fe3+-activated NIR long afterglow phosphor composed of Mg2SnO4 (MSO) is reported, which exhibits a high-efficiency NIR afterglow with a record persistent time lasting over 31 hours among Fe3+-based phosphors.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Leipeng Li, Chongyang Cai, Xiaohuan Lv, Xingqiang Shi, Dengfeng Peng, Jianrong Qiu, Yanmin Yang
Summary: Due to the upcoming global energy crisis, the search for energy-saving materials has become more urgent. Mechanically induced luminescent materials have received considerable attention over the past two decades for their ability to convert waste into useful components, such as converting stress into light. This study introduces a strategy to improve mechanoluminescence (ML) of ZnO by embedding it in a ZnF2:Mn2+ matrix, which shows promising applications in various mechano-optics scenarios.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Inorganic & Nuclear
Qi Yang, Meng-Qing Yu, Zi-Ang Su, Zhen Pei, Dengfeng Peng, Guo Peng, Xiao-Ming Ren
Summary: Two hybrid compounds of organic-inorganic manganese(II) halides were synthesized using a mixed-ligand strategy. They possess high thermal stability, emit strong green light, and can be used for fabricating green light-emitting diodes (LEDs) and rewritable anticounterfeiting printing and information storage.
INORGANIC CHEMISTRY
(2023)
Editorial Material
Multidisciplinary Sciences
Xiuwen Xu, Jie Cao, Dengfeng Peng, Bing Chen
News Item
Multidisciplinary Sciences
Biyun Ren, Bing Chen, Xianhui Zhang, Honglei Wu, Yu Fu, Dengfeng Peng
Article
Materials Science, Multidisciplinary
Yang Guo, Jiangkun Chen, Bing Chen, Weilin Zheng, Xin Zhang, Hao Suo, Fengjun Chun, Xiaohe Wei, Feng Wang
Summary: This study investigates thermo-responsive luminescence in doped Cs2ZnCl4 crystals. The thermal elevation of the orbital state of dopant ions leads to a blueshift of self-trapped exciton (STE) emissions. By examining doped Cs2ZnCl4 crystals, the polyhedral distortion and its effect on luminescence properties are quantitatively addressed. Dual emissions in Sb3+/Mn2+ co-doped Cs2ZnCl4 with distinct luminescence responses to thermal stimuli are synthesized, enabling a new tactic for tunable thermochromic luminescence.
MATERIALS TODAY PHYSICS
(2023)
Article
Chemistry, Multidisciplinary
Changjian Chen, Zhu Lin, Honghui Huang, Xin Pan, Tian-Liang Zhou, Hongde Luo, Libo Jin, Dengfeng Peng, Jian Xu, Yixi Zhuang, Rong-Jun Xie
Summary: Converting mechanical energy into photon emission has significant implications for intelligent sensing, self-powered lighting, and distributed energy harvesting. Understanding the dynamic process of intensity variation in mechano-to-photon conversion is challenging and requires a time-domain characterization scheme. By characterizing the mechanoluminescence decay, the dynamics of charge migration in ML materials can be revealed. This research also demonstrates the temperature dependence and stress fluctuation resistance of ML decay, which opens up new possibilities for self-powered and remote temperature sensing. Additionally, an ultrafast-response stress sensor utilizing ML sensing technology is developed.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Teng Zheng, Marcin Runowski, Inocencio R. Martin, Kevin Soler-Carracedo, Liang Peng, Malgorzata Skwierczynska, Malgorzata Sojka, Justyna Barzowska, Sebastian Mahlik, Hanoch Hemmerich, Fernando Rivera-Lopez, Piotr Kulpinski, Victor Lavin, Daniel Alonso, Dengfeng Peng
Summary: A multifunctional sensing platform based on photoluminescence (PL) and mechanoluminescence (ML) is created by combining heterojunctioned ZnS/CaZnOS:Mn2+ mechano-photonic materials and fiber spinning. Flexible optical devices capable of emitting light driven by mechanical force are developed by embedding ML-active particles in micrometer-sized cellulose fibers using a 3D-printing technique. The platform allows low-pressure sensing up to 100 bar and demonstrates a superior high-pressure sensitivity of 6.20 nm GPa(-1) using the developed optical manometer based on the PL of the materials. Four modes of temperature detection are achieved using this platform.
ADVANCED MATERIALS
(2023)
Article
Engineering, Manufacturing
Xuming Wang, Di Gao, Fang Su, Yuantian Zheng, Xu Li, Zhiyuan Liu, Changyong Liu, Pei Wang, Dengfeng Peng, Zhangwei Chen
Summary: In this paper, luminescent ZnS/CaZnOS:Mn2+ ceramic parts were prepared via vat photopolymerization 3D printing, and their potential applications were discussed. The study combines luminescent materials with 3D printing technology to produce complex components with low surface roughness and high chemical stability.
ADDITIVE MANUFACTURING
(2023)
Article
Automation & Control Systems
Hongyou Zhou, Xin Wang, Yongcheng He, Haohua Liang, Meihua Chen, Haojun Liu, Abdulkareem Qasem, Puxian Xiong, Dengfeng Peng, Jiulin Gan, Zhongmin Yang
Summary: This paper reports a self-powered and stretchable optical fiber strain sensor with distributed sensing capability based on mechanoluminescent optical fiber. It can locate and quantify large strains through wavelength coding technique and time-domain filtering comparison method. The sensor shows insensitivity to bending, compression, and temperature disturbances, and has outstanding durability. With excellent light confinement of the elastomer optical fiber, it has the potential to be a promising technology for future self-powered distributed optical sensing systems.
ADVANCED INTELLIGENT SYSTEMS
(2023)
Article
Materials Science, Multidisciplinary
Yixiao Han, Leipeng Li, Chongyang Cai, Pei Li, Tao Li, Xiumei Han, Dengfeng Peng, Yanmin Yang
Summary: Mechanoluminescent materials have the unique capability of converting mechanical actions into usable light sources. This study demonstrates the energy-saving temperature sensing application of Y2O2S:Er3+ material, expanding the potential applications of mechanoluminescent materials.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Materials Science, Multidisciplinary
Hao Suo, Yu Wang, Xin Zhang, Weilin Zheng, Yang Guo, Leipeng Li, Panlai Li, Yanmin Yang, Zhijun Wang, Feng Wang
Summary: The rapid development of NIR spectroscopic techniques has led to the discovery of novel luminescent materials as broadband NIR light sources. Conventional phosphors powered by electricity may aggravate the energy demands. In this study, Ga2O3:Cr3+ nanophosphors are reported to emit broadband NIR light under mechanical action through self recoverable mechanoluminescence (ML). The ML intensity and profile can be deliberately tuned through crystal-site engineering. Highly tunable light emission in the range of 650-1,100 nm is achieved by controlling the dopant concentration of In3+ and Yb3+ co-doping. These findings contribute to the library of sustainable NIR light sources and offer new possibilities for advanced sensing and spectroscopy studies.
