Sensitive Photodetector Arrays Based on Patterned CH3NH3PbBr3 Single Crystal Microplate for Image Sensing Application

• Published in: Advanced optical materials 2021-08, Vol.9 (15), p.n/a
• Main Authors: Li, Chen, Li, Jia‐Xiang, Li, Chun‐Yan, Wang, Jiang, Tong, Xiao‐Wei, Zhang, Zhi‐Xiang, Yin, Zhi‐Ping, Wu, Di, Luo, Lin‐Bao
• Format: Article
• Language: English
• Subjects: Arrays; hybrid perovskites; integrated photodetectors; Materials science; microplate arrays; modified photolithography; Optics; Optoelectronic devices; Perovskites; Photolithography; Photometers; photosensing and imaging; Pixels; Single crystals
• ISSN: 2195-1071; 2195-1071
• DOI: 10.1002/adom.202100371

Hybrid perovskite has attracted intensive attention for its diverse optoelectronic applications, and integrated perovskite devices are broadly required in various functional optoelectronics. In this study, an integrated photodetector (PD) array is developed based on perovskite microplate arrays for trajectory track and image sensing application. The perovskite microplate array is fabricated by a modified photolithography method, which can confine the growth of perovskite single‐crystal microplate arrays with controlled dimension. Optoelectronic measurement of the microplate array device reveals that the as‐fabricated PD devices exhibit not only obvious photoresponse characteristics at zero bias, with a high on–off ratio of up to 1.5 × 104, a responsivity of 0.38 AW−1, and specific detectivity of 1.7 × 1012 Jones, respectively, but also relatively good uniformity, with neglectable pixel‐to‐pixel variation. In addition, the as‐integrated PD arrays can capture real‐time light traces and record simple character with satisfactory resolution, which indicates that the current integrated perovskite device has potential application in light trajectory tracking and image sensing. CH3NH3PbBr3 microplate arrays are fabricated by a modified photolithography method which can confine the growth of perovskite single‐crystal microplate arrays with controlled dimension and position. Patterned CH3NH3PbBr3 single crystal microplate‐based sensitive photodetector array consisting of 6 × 6 device units shows excellent optoelectronic performance with potential applications in visible‐light image sensing.