Article
Multidisciplinary Sciences
Ke Sun, Dezhi Tan, Xinyuan Fang, Xintao Xia, Dajun Lin, Juan Song, Yonghong Lin, Zhaojun Liu, Min Gu, Yuanzheng Yue, Jianrong Qiu
Summary: This study presents a method of three-dimensional direct lithography of perovskite nanocrystals (PNCs) in glass, allowing for the control of composition and bandgap through ultrafast laser-induced liquid nanophase separation. The fabricated PNCs exhibit remarkable stability against UV irradiation, organic solution, and high temperatures, making them suitable for optical storage, micro-light emitting diodes, and holographic displays.
Article
Chemistry, Multidisciplinary
Yuhao Li, Minchao Qin, Yunfan Wang, Shiang Li, Zhaotong Qin, Sai-Wing Tsang, Chun-Jen Su, Yubin Ke, Xinhui Lu
Summary: In this research, the phase transition behavior of cesium lead iodide (CsPbI3) quantum dot (QD) films under different temperature profiles was investigated using in situ scattering techniques. It was found that the phase transition from black phase to yellow phase can be induced by the instant heating-up (IHU) process, while the majority of QDs remained in the black phase under the slow heating-up (SHU) process. Further analysis revealed that the phase transition is triggered by the removal of surface ligands, which alters the energy landscape. The lattice symmetry plays a crucial role in determining the transition rate and the coexistence black-to-yellow phase ratio. Therefore, the lattice symmetry can be used as an indicator to monitor the phase transition of CsPbI3 QDs and adjust the coexistence ratio for specific applications.
Article
Nanoscience & Nanotechnology
Seock-Jin Jeong, Sinyoung Cho, Bowon Moon, Justice Agbeshie Teku, Min-Hye Jeong, Somi Lee, Younghoon Kim, Jong-Soo Lee
Summary: We present high-performance 0D-2D hybrid photodetectors that combine tunable band gap perovskite quantum dots with MOCVD-grown bilayer MoS2. These devices exhibit a high responsivity up to 10(7) AW(-1) and a high specific detectivity exceeding 10(13) Jones due to the difference in built-in potential between quantum dots and multilayer MoS2. This work suggests the potential for fabricating high-performance photodetectors by integrating quantum dots with 2D materials.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Chujie Wang, Sri K. Matta, Chun Kiu Ng, Chang Cao, Manoj Sharma, Anthony S. R. Chesman, Salvy P. Russo, Jacek J. Jasieniak
Summary: In this article, a facile direct synthesis method of CsPbX3 perovskite nanocrystal assemblies is reported. These assemblies possess narrow and red-shifted photoluminescence, expanding the color gamut of inorganic perovskites.
Article
Chemistry, Physical
Junqi Hu, Mengmeng Yang, Xi Ke, Shuhui Yang, Kunqiang Wang, Haowei Huang, Weizhe Wang, Dongxiang Luo, Zhaoqiang Zheng, Le Huang, Peng Xiao, Chen Tu, Yonggang Min, Nengjie Huo, Menglong Zhang
Summary: In this study, a mixed dimensional material containing cubic 0D CsPbBr3 perovskite quantum dots and cubic 2D-PbS was prepared for CO2 reduction to fuels. The combination of 0D and 2D materials resulted in improved photocurrent and outstanding selectivity and activity in reducing CO2 to CO and CH4. The synthesized PQDs on 2D-PbS exhibited a reduced size compared to those synthesized in solvent, leading to wider bandgap and enhanced potential for photocatalytic reactions.
JOURNAL OF POWER SOURCES
(2021)
Article
Multidisciplinary Sciences
Su Kong Chong, Lizhe Liu, Kenji Watanabe, Takashi Taniguchi, Taylor D. Sparks, Feng Liu, Vikram V. Deshpande
Summary: Transport evidence of two-dimensional (2D) topological states in a bulk insulating three-dimensional (3D) topological insulator (TI) is provided. The existence of a finite longitudinal conductance at the surface gap suggests the emergence of a quantum spin Hall (QSH) state. The transition from QSH to quantum Hall (QH) state in a transverse magnetic field further supports the existence of this unique 2D topological phase. Another method of achieving the 2D topological state is demonstrated through surface gap-closing and topological phase transition mediated by a transverse electric field.
NATURE COMMUNICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Yu-Hang Zhou, Chenyue Wang, Shuai Yuan, Chen Zou, Zhenhuang Su, Kai -li Wang, Yu Xia, Bin Wang, Dawei Di, Zhao-Kui Wang, Liang-Sheng Liao
Summary: Efficient blue perovskite light-emitting diodes (PeLEDs) have been a challenge, with only promising results in the sky-blue region. This study demonstrates deep-blue PeLEDs with guanidine (GA+)-induced perovskite emitters, achieving spectrally stable PeLEDs with a record external quantum efficiency (EQE) over 3.41%. The presence of GA+ stabilizes low-dimensional species, retarding energy transfer and facilitating deep-blue electroluminescence. This finding offers a new approach to achieve deep-blue PeLEDs.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Chemistry, Physical
Pavel M. Talianov, Oleksii O. Peltek, Mikhail Masharin, Soslan Khubezhov, Mikhail A. Baranov, Audrius Drabavicius, Alexander S. Timin, Lev E. Zelenkov, Anatoly P. Pushkarev, Sergey Makarov, Mikhail Zyuzin
Summary: This study demonstrates the potential of coated CsPbBr3 nanocrystals for bioimaging, improving their stability in aqueous solutions with high quality.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Article
Chemistry, Multidisciplinary
Hao-Fei Ni, Lou-Kai Ye, Peng-Cheng Zhuge, Bo-Lan Hu, Jia-Rui Lou, Chang-Yuan Su, Zhi-Xu Zhang, Li-Yan Xie, Da-Wei Fu, Yi Zhang
Summary: This study reports a new nickel-based organic-inorganic halide perovskite ferroelectric with high spontaneous polarization and Curie temperature. The unique structure contributes to the diversity of organic-inorganic halide perovskite structures and will further promote research on nickel-based organic-inorganic halide perovskite ferroelectrics.
Article
Optics
Zhanhong Ma, Chao Ma, Xin Ma, Chenghao Bi, Jing Li, Xuejiao Sun
Summary: Metal halide perovskite nanocrystals have excellent optical properties and potential for optoelectronic device applications, but their photo- and thermostability still need optimization. This study investigates the degradation behaviors of CsPbI3 nanocrystals used as an optical conversion layer in blue micro-LEDs and shows that both blue light irradiation and high temperature can cause degradation and reduction of the photoluminescence quantum yield. The work provides insights into the correlation between light irradiation and temperature consequences for CsPbI3 nanocrystals, which is important for optoelectronic device applications.
Article
Chemistry, Multidisciplinary
Ziyi Wang, Xu Chen, Yipeng Song, Zhipeng Du, Yang Zhou, Minjuan Li, Weiqi Huang, Qianting Xu, Yanqiang Li, Sangen Zhao, Junhua Luo
Summary: This work reports the observation of heat switching birefringence in a 2D layered hybrid halide perovskite crystal. Structure analyses reveal the impact of heat-induced structure transition on birefringence. This discovery may contribute to the development of stimuli-responsive polarization optical devices.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Fang-Fang Di, Hang Peng, Hua Zhang, Xue-Qin Huang, Wu-Jia Chen, Yu-Ling Liu, Yuan-Yuan Tang
Summary: Monofluorine substitution serves as a simple and universal method to enhance the performance of high-Tc phase transition materials. The experimental results on (FTEA)PbBr3 validate the effects of fluoridation on boosting Tc, dielectric properties, and luminescent properties.
MATERIALS CHEMISTRY FRONTIERS
(2021)
Article
Chemistry, Physical
Ruilin Zheng, Jumpei Ueda, Kenji Shinozaki, Setsuhisa Tanabe
Summary: This study investigates the phase segregation mechanism of mixed-halide perovskite nanocrystals (NCs) using glass encapsulation. The results show that thermal-induced local temperature increase plays a dominant role in the phase segregation of mixed-halide perovskite NCs. The recovery process is driven by the spontaneous crystallization of the amorphous mixed-halide phase.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Article
Chemistry, Multidisciplinary
Jinxiao Zheng, Guichu Yue, Zi'an Zhou, Hui Li, Lanlan Hou, Chenghua Sun, Xuanze Li, Lei Kang, Nu Wang, Yong Zhao, Shuyun Zhou
Summary: Converting and patterning high-quality perovskite quantum dots (PQDs) into flexible thin films is important for solid-state optical applications. However, their poor stability and low quantum efficiency after film formation hinder their usability. This study demonstrates an in situ synthesis strategy to prepare long-term stable CsPb(Br0.3I0.7)(3)@poly(methylmethacrylate) (PMMA) PQDs fibers with thermal responsive fluorescence performance, which can rapidly and reversibly quench and recover between heating and cooling cycles. This temperature-reversible luminescence characteristic not only deepens the understanding of perovskite material's temperature-dependent phase transition behavior but also broadens their applications in various temperature-responsive fields.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Chuying Ye, Jiawei Jiang, Shaolan Zou, Wenbo Mi, Yin Xiao
Summary: We developed type-II core-shell nanocrystals with a chiral low-dimensional perovskite shell and an achiral 3D MAPbBr(3) core. The core-shell nanocrystals exhibit spin-polarized luminescence and circularly polarized luminescence, which is controlled by the chiral-induced spin selectivity (CISS) effect. The spin-polarized light-emitting diode (spin-LED) also achieved circularly polarized electroluminescence under ambient conditions.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)