Electronic-Grade High-Quality Perovskite Single Crystals by a Steady Self-Supply Solution Growth for High-Performance X-ray Detectors |
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Authors: | Wenzhen Wang Hua Meng Huanzhen Qi Haitao Xu Wenbin Du Yiheng Yang Yongsheng Yi Shengqi Jing Shanhu Xu Feng Hong Juan Qin Jian Huang Zhan Xu Yanyan Zhu Run Xu Jianming Lai Fei Xu Linjun Wang Jingtao Zhu |
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Affiliation: | 1. School of Materials Science and Engineering, Shanghai University, Nanchen Road, Shanghai, 200444 China;2. Department of Physics, Shaoxing University, 508 Huancheng West Road, Shaoxing, 312000 China;3. SHU-Solar E R&D Lab, Department of Physics, College of Sciences, Shanghai Key Laboratory of High Temperature Superconductors, Shanghai University, 99 Shangda Road, Shanghai, 200444 China;4. MOE Key Laboratory of Advanced Micro-structured Materials, School of Physics Science and Engineering, Tongji University, 1239 Siping Road, Shanghai, 200092 China |
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Abstract: | High-quality perovskite single crystals with large size are highly desirable for the fundamental research and high energy detection application. Here, a simple and convenient solution method, featuring continuous-mass transport process (CMTP) by a steady self-supply way, is shown to keep the growth of semiconductor single crystals continuously stable at a constant growth rate until an expected crystal size is achieved. A significantly reduced full width at half-maximum (36 arcsec) of the (400) plane from the X-ray rocking curve indicates a low angular dislocation of 6.8 × 106 cm−2 and hence a higher crystalline quality for the CH3NH3PbI3(MAPbI3) single crystals grown by CMTP as compared to the conventional inverse temperature crystallization (ITC) method. Furthermore, the CMTP-based single crystals have lower trap density, reduced by nearly 200% to 4.5 × 109 cm−3, higher mobility increased by 187% to 150.2 cm2 V−1 s−1, and higher mobility–lifetime product increased by around 450% to 1.6 × 10−3 cm2 V−1, as compared with the ITC-grown reference sample. The high performance of the CMTP-based MAPbI3 X-ray detector is comparable to that of a traditional high-quality CdZnTe device, indicating the CMTP method as being a cost-efficient strategy for high-quality electronic-grade semiconductor single crystals. |
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Keywords: | high carrier transport properties perovskite single crystals self-supply solution growth X-ray detectors |
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