CAS Center for Excellence in Nanoscience, Beijing Key Laboratory of Micro-Nano Energy and Sensor, Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing, 100083, P. R. China.
School of Nanoscience and Technology, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China.
Adv Mater. 2018 Nov;30(44):e1802110. doi: 10.1002/adma.201802110. Epub 2018 Sep 24.
Stability is a key problem that hinders the practical application of lead halide perovskite. Therefore, all-inorganic perovskite CsPbX monocrystalline films are urgently needed to fabricate photoelectric devices. Herein, a low-temperature and substrate-independent growth method is demonstrated to grow millimeter-level inorganic perovskite monocrystalline thin films. These films present good optical and electrical properties comparable to bulk ones. What is more, they exhibit excellent long-term stability toward humidity and thermal treatment. The as-grown CsPbBr monocrystalline films are then fabricated into photodetectors with high photodetection performance. These results demonstrate that the CsPbBr monocrystalline films have potential in fabricating high-performance optoelectronic devices.
稳定性是阻碍卤铅钙钛矿实际应用的一个关键问题。因此，迫切需要制备全无机钙钛矿 CsPbX 单晶薄膜来制作光电设备。在此，本文展示了一种低温且基底独立的生长方法来制备毫米级别的无机钙钛矿单晶薄膜。这些薄膜具有良好的光学和电学性能，与体材料相当。更重要的是，它们在湿度和热处理方面表现出优异的长期稳定性。然后，将所生长的 CsPbBr 单晶薄膜制备成具有高光探测性能的光电探测器。这些结果表明 CsPbBr 单晶薄膜在制备高性能光电设备方面具有潜力。
