Photodetector Based on CsPbBr3/Cs4PbBr6 Composite Nanocrystals with High Detectivity

Yue Han, Rong Wen, Feng Zhang, Linlin Shi, Wenyan Wang, Ting Ji, Guohui Li, Yuying Hao, Lin Feng, Yanxia Cui
2021 Crystals  
High-quality, all-inorganic CsPbBr3/Cs4PbBr6 composite perovskite nanocrystals (NCs) were obtained with all-solution-processing at room temperature, and a photodetector (PD) with high detectivity was realized based on CsPbBr3/Cs4PbBr6 NCs. The detectivity (D*) of the proposed PD is 4.24 × 1012 Jones under 532 nm illumination, which is among the highest levels for PDs based on all-inorganic perovskite NCs. In addition, a high linear dynamic range (LDR) of 115 dB under 1 V bias was also realized.
more » ... Furthermore, the underlying mechanism for the enhanced performance of the proposed PD was discussed. Our work might promote the preparation of high-performance PDs based on dual-phase all-inorganic perovskite nanocrystals.
doi:10.3390/cryst11111287 fatcat:u2ji4zf4yvb3vlp7v7s5o53d5m