TY - JOUR
T1 - Enhanced performance of solution-processed all-inorganic halide perovskite photodetectors by using bulk heterojunction and lateral configuration
AU - Tang, Peiyun
AU - Yang, Shengyi
AU - Hu, Jinming
AU - Zhang, Zhenheng
AU - Jiang, Yurong
AU - Sulaman, Muhammad
AU - Tang, Libin
AU - Zou, Bingsuo
N1 - Publisher Copyright:
© 2021 Elsevier B.V.
PY - 2022/3/10
Y1 - 2022/3/10
N2 - Currently, all-inorganic halide perovskites are widely investigated for their applications in optoelectronics due to their excellent physical and chemical properties. In this paper, solution-processed bulk-heterojunction lateral photodetectors Ag/CsPbBr3:ZnO/Ag were built to enhance device performance, in which the active CsPbBr3 layer were surface-passivated by ZnO nanoparticles (NPs) in an optimized molar ratio. By optimizing the molar ratio of CsPbBr3 to ZnO NPs (i.e. kR=MCsPbBr3/MZnO), the photocurrent from the lateral photodetector was greatly enhanced and, the dark current was suppressed to as low as 10−12 A due to the lateral configuration by employing a 50 µm-width active layer made through an interdigital mask. As a result, the On/Off current ratio of the lateral photodetector Ag/CsPbBr3:ZnO/Ag reaches to more than 103 for an optimum molar ratio kR= 1:1, and it is 300-folds higher than that of the control device Ag/CsPbBr3/Ag, showing a maximum specific detectivity D* of 1.6 × 1011 Jones with a photoresponsivity of 3.8 mA/W under 16 µW/cm2 405 nm illumination at − 5 V. In this way, it provides an efficient method for solution-processed high-performance photodetectors by combining bulk heterojunction and lateral configuration.
AB - Currently, all-inorganic halide perovskites are widely investigated for their applications in optoelectronics due to their excellent physical and chemical properties. In this paper, solution-processed bulk-heterojunction lateral photodetectors Ag/CsPbBr3:ZnO/Ag were built to enhance device performance, in which the active CsPbBr3 layer were surface-passivated by ZnO nanoparticles (NPs) in an optimized molar ratio. By optimizing the molar ratio of CsPbBr3 to ZnO NPs (i.e. kR=MCsPbBr3/MZnO), the photocurrent from the lateral photodetector was greatly enhanced and, the dark current was suppressed to as low as 10−12 A due to the lateral configuration by employing a 50 µm-width active layer made through an interdigital mask. As a result, the On/Off current ratio of the lateral photodetector Ag/CsPbBr3:ZnO/Ag reaches to more than 103 for an optimum molar ratio kR= 1:1, and it is 300-folds higher than that of the control device Ag/CsPbBr3/Ag, showing a maximum specific detectivity D* of 1.6 × 1011 Jones with a photoresponsivity of 3.8 mA/W under 16 µW/cm2 405 nm illumination at − 5 V. In this way, it provides an efficient method for solution-processed high-performance photodetectors by combining bulk heterojunction and lateral configuration.
KW - All-inorganic halide perovskites
KW - Bulk heterojunction
KW - Lateral photodetector
KW - Solution-processed
KW - ZnO nanoparticles (NPs)
UR - http://www.scopus.com/inward/record.url?scp=85120654307&partnerID=8YFLogxK
U2 - 10.1016/j.jallcom.2021.163022
DO - 10.1016/j.jallcom.2021.163022
M3 - Article
AN - SCOPUS:85120654307
SN - 0925-8388
VL - 896
JO - Journal of Alloys and Compounds
JF - Journal of Alloys and Compounds
M1 - 163022
ER -
