Article
Materials Science, Ceramics
Xianju Zhou, Jie Zhang, Lingni Chen, Yanhong Li, Guotao Xiang, Sha Jiang, Li Li, Xiao Tang, Zhongmin Cao, Guangxin Xie
Summary: A series of novel red emission phosphors were successfully synthesized and their fluorescence performance and potential applications were verified through experiments.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2021)
Article
Multidisciplinary Sciences
Dongyuan Han, Jie Wang, Lorenzo Agosta, Ziang Zang, Bin Zhao, Lingmei Kong, Haizhou Lu, Irea Mosquera-Lois, Virginia Carnevali, Jianchao Dong, Jianheng Zhou, Huiyu Ji, Lukas Pfeifer, Shaik M. Zakeeruddin, Yingguo Yang, Bo Wu, Ursula Rothlisberger, Xuyong Yang, Michael Gratzel, Ning Wang
Summary: Lead-free perovskite light-emitting diodes prepared using tautomeric mixture coordination show improved ordering in the crystal structure, reduced recombination, and enhanced exciton binding energy.
Article
Chemistry, Inorganic & Nuclear
Zexin Li, Fenglei Sun, Haining Song, Haifeng Zhou, Yifei Zhou, Zhenlei Yuan, Peng Guo, Guangjun Zhou, Qianqian Zhuang, Xiaoqiang Yu
Summary: Lead-free double perovskite quantum dots were synthesized with white light emission properties, and their luminescence performance and stability were improved by Bi doping and SiO2 coating.
DALTON TRANSACTIONS
(2021)
Article
Materials Science, Multidisciplinary
Jingheng Nie, Bo Zhou, Shaofan Fang, Ye Wang, Yu Wang, Bingbing Tian, Hanlin Hu, Haizhe Zhong, Henan Li, Yumeng Shi
Summary: Metal halide perovskites (MHPs) are emerging semiconducting materials with exceptional opto-electronic properties. The exciton emission mechanism in MHPs is still not well understood due to their diverse chemical composition and versatile lattice structure. This review provides a critical overview of the experimental and theoretical approaches used to determine the exciton emission mechanism and summarizes the strategies for achieving efficient light emission in MHPs.
MATERIALS TODAY PHYSICS
(2023)
Article
Chemistry, Multidisciplinary
Lidia Romani, Andrea Speltini, Francesco Ambrosio, Edoardo Mosconi, Antonella Profumo, Marcello Marelli, Serena Margadonna, Antonella Milella, Francesco Fracassi, Andrea Listorti, Filippo De Angelis, Lorenzo Malavasi
Summary: This study presents a water-stable metal halide perovskite and demonstrates its application in promoting photocatalysis in aqueous medium, leading to impressive hydrogen evolution rate. The composite with g-C3N4 shows synergistic activity and efficient photocatalytic performance in water, paving the way for a new class of light-driven catalysts.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Review
Chemistry, Physical
Tianhao Wu, Xiao Liu, Xinhui Luo, Xuesong Lin, Danyu Cui, Yanbo Wang, Hiroshi Segawa, Yiqiang Zhang, Liyuan Han
Summary: Efficient and stable development of lead-free perovskite solar cells (PSCs) using tin as a promising candidate for high-performance, eco-friendly photovoltaic technology has been reviewed. Approaches toward efficiency improvement and challenges in reaching higher PCE and scalable production for tin PSCs have been discussed in this paper with the goal of accelerating their commercialization.
Article
Materials Science, Ceramics
Zheng Lu, Dashuai Sun, Zeyu Lyu, Sida Shen, Pengcheng Luo, Shuai Wei, Luhui Zhou, Hongpeng You
Summary: A series of LaCaGaO4:xBi(3+),yEu(3+) phosphors with adjustable emission colors were synthesized, and the crystal structures and luminescence properties of the phosphors were analyzed in detail. The energy transfer between Bi3+ and Eu3+ ions was studied, and the emission color of the phosphors could be changed by adjusting the concentration of Eu3+. The phosphors exhibited good performance in white light-emitting diode devices, indicating their potential for warm white lighting applications.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Chemistry, Multidisciplinary
Yuanyuan Fang, Jingtian Wang, Long Zhang, Guangming Niu, Laizhi Sui, Guorong Wu, Kaijun Yuan, Kai Wang, Bo Zou
Summary: Efficient warm white light emission is sought after in single-component materials for light-emitting applications. This study observed an unusual pressure-induced warm white emission enhancement in 2D perovskite (2meptH(2))PbCl4, accompanied by a significant increase in photoluminescence quantum yield. The collapse of the crystal structure triggered by octahedral distortions and the evolution of organic cations led to the emission enhancement, and further collapse promoted the formation of self-trapped excitons and suppressed nonradiative transitions, resulting in continuous photoluminescence enhancement under pressure.
Article
Chemistry, Physical
Ming Chen, Zhicheng Shan, Xiaofeng Dong, Shengzhong(Frank) Liu, Zhuo Xu
Summary: To explore stable lead-free perovskites for solar cell applications, a series of Dion-Jacobson (DJ) double perovskites with the formula BDA(2)M(I)M(III)X(8) were proposed. First-principles calculations demonstrated the thermal stabilities of all the proposed BDA(2)M(I)M(III)X(8) perovskites. Three candidates with suitable solar band gaps and superior optoelectronic properties were selected for photovoltaic application. The study provides a new concept for designing lead-free perovskites for efficient solar cells.
NANOSCALE HORIZONS
(2023)
Article
Materials Science, Multidisciplinary
Hang Yin, Qingkun Kong, Ruiling Zhang, Daoyuan Zheng, Bin Yang, Keli Han
Summary: This study synthesized Cs2AgIn1-gamma-xBixLa gamma Cl6 NCs to achieve a broadband bright warm-white emission in the visible region with an excellent PL quantum yield of 60%. The research suggests that high-efficiency PL is induced by triplet self-trapping exciton emission, and the incorporation of La3+-Bi3+ facilitates the singlet-triplet transition.
SCIENCE CHINA-MATERIALS
(2021)
Review
Nanoscience & Nanotechnology
Yuetong Fang, Shuaibo Zhai, Liang Chu, Jiasong Zhong
Summary: Memristors are gaining attention as a basic circuit element, especially in the field of nonvolatile memory devices. Halide perovskite memristors are seen as a potential solution for low-cost information storage and computing. Developing lead-free HP memristors is crucial to address the issues of high toxicity and low stability associated with lead-based HP memristors.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Optics
Shuangyi Zhao, Qionghua Mo, Wensi Cai, Huaxin Wang, Zhigang Zang
Summary: Lead-free cesium copper chloride nanocrystals with unique optical properties were synthesized, showing promise for applications in solid-state lighting.
PHOTONICS RESEARCH
(2021)
Article
Chemistry, Physical
Peifen Zhu, Saroj Thapa, Hongyang Zhu, Stephen Wheat, Yang Yue, Dilip Venugopal
Summary: This study presents a simple recrystallization process to prepare halide double perovskites (DP) Cs2Ag1-xKxIn0.875Bi0.125Cl6 (x≤0.60) under ligand-free conditions, and improves their optical properties by tuning the composition. With the optimal alloying content, these halide DPs exhibit high-quality white light emission suitable for white LED. This research provides insight into achieving environmentally friendly and high-efficiency white light emission using abundant elements and a low-cost synthesis method.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Multidisciplinary
Hui Zhang, Shurong Wang, Huanhuan Yao, Zhiyue Tang, Liming Ding, Feng Hao
Summary: In this study, the phase separation of PEDOT and PSS chains in the film was controlled by ammonium carbamate (AC), resulting in a modified film with lower trap density and more facile carrier transport. As a result, tin halide perovskite solar cells (TPSCs) using the modified PEDOT:PSS film achieved a significantly improved short-circuit photocurrent (J(sc)), open-circuit voltage (V-oc), and power conversion efficiency (PCE).
CHEMICAL COMMUNICATIONS
(2023)
Article
Materials Science, Multidisciplinary
Shanti Maria Liga, Gerasimos Konstantatos
Summary: Cesium titanium halide perovskites are a novel type of lead-free optoelectronic material, with power conversion efficiencies in solar cells reaching 3.3%. This study reports the first successful colloidal synthesis of pure and mixed bromide-iodide cesium titanium perovskite nanocrystals, with tunable bandgaps from 2.3 eV to 1.2 eV.
JOURNAL OF MATERIALS CHEMISTRY C
(2021)
Article
Chemistry, Multidisciplinary
Wenqiang Deng, Ting Fan, Jiantao Lu, Jingling Li, Tingting Deng, Mingqi Liu
Summary: CsPbClxBr3-x nanocrystals were prepared by ligand-assisted deposition at room temperature and their fluorescence emission wavelength was accurately adjusted by doping TbCl3, enabling continuous and accurate spectral regulation from green to blue. This method provides a new scheme for fast anion exchange of all-inorganic perovskite nanocrystals in an open environment at room temperature.
Article
Materials Science, Ceramics
Ting Fan, Jian-tao Lu, Wen-qiang Deng, Jun-xian Mai, Jie Liang, Ting-ting Deng, Wen Fan, Qin-song Zhou, Qi-feng Lin
Summary: Water-soluble Mn2+ doped CsPbCl3 nanocrystals coated with 6-aminocaproic acid (ACA) ligand were successfully prepared. The nanocrystals exhibited good water solubility, water stability, low cytotoxicity, and high luminescence properties, making them highly promising for applications in orange LED and fluorescent probes.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Physical
Jing Xiao, Hui-Juan Yu, De-Xun Xie, Akira Shinohara, Ting Fan, Jicheng Yi, Joshua Yuk Lin Lai, Guang Shao, He Yan
Summary: In this study, we report a pair of perylene diimide (PDI) non-fullerene small molecular acceptors (SMAs) based on a phenazine core with either benzene or thiophene linkers. We introduced a relatively parallel orientation for PDI units by connecting two PDI units on the same side of the phenazine core. Our work provides important understanding on the linker influence of structural properties and guidelines for the design of high performance PDI-based SMAs.
SUSTAINABLE ENERGY & FUELS
(2022)
Article
Chemistry, Multidisciplinary
Jie Liang, Ting Fan, Jian-tao Lu, Tianjie Guan, Ting-ting Deng, Bangyun Xiong
Summary: NaGdF4:Ce,Eu,Tb nanocrystals were prepared through a one-step hydrothermal method using Ce3+ ions as sensitizers, Eu3+ and Tb3+ ions as activators, and polyethylenimine (PEI) as surfactants. Color-adjustable fluorescence emission was achieved through energy transfer between rare earth ions. Blue fluorescent carbon quantum dots (CDs) with dual UV response under 254 nm and 365 nm excitation were synthesized. A hydrophilic NaGdF4:Ce,Eu,Tb/CD composite ink was prepared by physical mixing, allowing for color adjustable luminescence and obtaining white light emission with color coordinates of (0.32, 0.32). A dual-mode luminescence anti-counterfeiting pattern was designed and achieved by UV excitation at 254 nm and 365 nm.
