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Solution‐Processed High‐Quality Cesium Lead Bromine Perovskite Photodetectors with High Detectivity for Application in Visible Light Communication
Advanced Optical Materials ( IF 8.0 ) Pub Date : 2020-02-19 , DOI: 10.1002/adom.201901735 Ronghuan Liu 1 , Jianqiang Zhang 1 , Hai Zhou 1 , Zehao Song 1 , Zhaoning Song 2 , Corey R. Grice 2 , Dingjun Wu 1 , Liangping Shen 1 , Hao Wang 1
Advanced Optical Materials ( IF 8.0 ) Pub Date : 2020-02-19 , DOI: 10.1002/adom.201901735 Ronghuan Liu 1 , Jianqiang Zhang 1 , Hai Zhou 1 , Zehao Song 1 , Zhaoning Song 2 , Corey R. Grice 2 , Dingjun Wu 1 , Liangping Shen 1 , Hao Wang 1
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Cesium lead bromide (CsPbBr3) perovskite photodetectors (PDs) are attractive for applications in visible light communication (VLC) due to ultra‐high detectivity and fast response speed. However, the fabrication of high‐quality CsPbBr3 polycrystalline films using solution‐based process is very challenging. Due to the low solubility of CsBr in precursor solutions, solution‐processed CsPbBr3 films are typically discontinuous and porous, hindering the performance of resulting PDs. Herein, a facile and modified sequential spin‐coating method is introduced to prepare high‐crystallinity, pinhole‐free CsPb2Br5‐CsPbBr3 perovskite films with an average grain size of ≈1 µm. The hole‐transport‐layer‐free (HTL‐free) PDs based on the CsPb2Br5‐CsPbBr3 perovskite films show high performance parameters, including the responsivity of 0.11 A W−1, the detectivity of 1.4 × 1012 Jones, a linear dynamic range of 128.6, and an on/off ratio of 1.5 × 106. The PDs outperform other HTL‐free perovskite PDs and are comparable to the p–i–n perovskite PDs reported in the literature. In addition, the high‐performance CsPb2Br5‐CsPbBr3 PDs are applied in VLC by using the PD as a self‐powered signal receiver of voice commands in a simulated room. This work uniquely combines the features of high‐performance self‐powered perovskite PDs with VLC techniques, paving the path to wide applications of all‐inorganic perovskite PDs.
中文翻译：
解决方案处理的高检出率的高质量铯铅溴钙钛矿光电探测器，用于可见光通信
溴化铯（CsPbBr 3）钙钛矿光电探测器（PDs）具有超高的探测能力和快速的响应速度，因此在可见光通信（VLC）中非常有吸引力。然而，使用基于溶液的工艺制造高质量的CsPbBr 3多晶膜是非常具有挑战性的。由于CsBr在前体溶液中的溶解度低，因此溶液处理的CsPbBr 3膜通常不连续且多孔，从而阻碍了所得PD的性能。本文介绍了一种简便且经过改进的顺序旋涂方法，以制备高结晶度，无针孔的CsPb 2 Br 5 ‐CsPbBr 3钙钛矿薄膜的平均晶粒尺寸约为1 µm。基于CsPb 2 Br 5 -CsPbBr 3钙钛矿薄膜的无空穴传输PD（无HTL）PD显示了高性能参数，包括0.11 AW -1的响应度，1.4×10 12 Jones的检测度，线性动态范围为128.6，开/关比为1.5×10 6。该PD优于其他不含HTL的钙钛矿PD，与文献中报道的p–i–n钙钛矿PD相当。此外，高性能CsPb 2 Br 5 ‐CsPbBr 3通过将PD用作模拟房间中语音命令的自供电信号接收器，将PD应用于VLC。这项工作将高性能自供电钙钛矿PD的功能与VLC技术独特地结合在一起，为全无机钙钛矿PD的广泛应用铺平了道路。
更新日期：2020-04-21
中文翻译：
解决方案处理的高检出率的高质量铯铅溴钙钛矿光电探测器，用于可见光通信
溴化铯（CsPbBr 3）钙钛矿光电探测器（PDs）具有超高的探测能力和快速的响应速度，因此在可见光通信（VLC）中非常有吸引力。然而，使用基于溶液的工艺制造高质量的CsPbBr 3多晶膜是非常具有挑战性的。由于CsBr在前体溶液中的溶解度低，因此溶液处理的CsPbBr 3膜通常不连续且多孔，从而阻碍了所得PD的性能。本文介绍了一种简便且经过改进的顺序旋涂方法，以制备高结晶度，无针孔的CsPb 2 Br 5 ‐CsPbBr 3钙钛矿薄膜的平均晶粒尺寸约为1 µm。基于CsPb 2 Br 5 -CsPbBr 3钙钛矿薄膜的无空穴传输PD（无HTL）PD显示了高性能参数，包括0.11 AW -1的响应度，1.4×10 12 Jones的检测度，线性动态范围为128.6，开/关比为1.5×10 6。该PD优于其他不含HTL的钙钛矿PD，与文献中报道的p–i–n钙钛矿PD相当。此外，高性能CsPb 2 Br 5 ‐CsPbBr 3通过将PD用作模拟房间中语音命令的自供电信号接收器，将PD应用于VLC。这项工作将高性能自供电钙钛矿PD的功能与VLC技术独特地结合在一起，为全无机钙钛矿PD的广泛应用铺平了道路。
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