High-performance omnidirectional self-powered photodetector constructed by CsSnBr3/ITO heterostructure film
Dong Liu, Fengjing Liu, Jie Zhang, Zixu Sa, Mingxu Wang, Sen Po Yip, Junchen Wan, Pengsheng Li, Zaixing Yang
Abstract
Omnidirectional photodetectors attract enormous attention due to their prominent roles in optical tracking systems and omnidirectional cameras. However, it is still a challenge for the construction of high-performance omnidirectional photodetectors where the incident light can be effectively absorbed in multiple directions and the photo-generated carriers can be effectively collected. Here, a high-performance omnidirectional self-powered photodetector based on the CsSnBr3/indium tin oxide (ITO) heterostructure film was designed and demonstrated. The as-fabricated photodetector exhibited excellent self-powered photodetection performance, showing responsivity and detectivity up to 35.1 mA/W and 1.82 × 1010 Jones, respectively, along with the smart rise/decay response time of 4 ms/9 ms. Benefitting from the excellent photoelectric properties of the CsSnBr3 film as well as the ability of the CsSnBr3/ITO heterostructure to efficiently separate and collect photo-generated carriers, the as-fabricated photodetector also exhibited excellent omnidirectional self-powered photodetection performance. All the results have certified that this work finds an efficient way to realize high-performance omnidirectional self-powered photodetectors.