A high-performance photodetector based on an inorganic perovskite–ZnO heterostructure. Issue 25 (20th June 2017)

• Record Type: Journal Article
• Authors: Liu, Heng; Zhang, Xingwang; Zhang, Liuqi; Yin, Zhigang; Wang, Denggui; Meng, Junhua; Jiang, Qi; Wang, Ye; You, Jingbi
• Is Part Of: Journal of materials chemistry. Volume 5:Issue 25(2017)
• Page Start: 6115
• Page End: 6122
• Publication Date: 2017-06-20
• Subjects: Materials -- Periodicals; Chemistry, Analytic -- Periodicals; Optical materials -- Research -- Periodicals; Electronics -- Materials -- Research -- Periodicals; 543.0284
• DOI: 10.1039/c7tc01998j
• Languages: English
• ISSNs: 2050-7526

Abstract

Abstract : CsPbBr3 /ZnO heterostructure photodetectors exhibit a high photoresponsivity because of the interfacial charge transfer from perovskite to ZnO. Abstract : All-inorganic perovskites, such as CsPbX3 (X = Cl, Br, I), have recently emerged as highly promising optoelectronic materials due to their excellent physical properties, especially their higher thermal stability. However, the performance of a CsPbX3 -based photodetector is worse than its counterparts based on organic–inorganic hybrid perovskites. In this work, we demonstrate flexible high performance photodetectors based on the CsPbBr3 /ZnO heterostructure using solution-processesing. Owing to the interfacial charge transfer from perovskite to ZnO, the photocurrent of devices was enhanced by more than one order of magnitude after the introduction of a ZnO layer. The CsPbBr3 /ZnO heterostructure photodetectors exhibited high sensitivity with an on/off ratio of >10 4 under 450 nm light illumination and a high photoresponsivity of 4.25 A W −1 . Furthermore, CsPbBr3 /ZnO photodetectors with excellent stability and outstanding flexibility were also demonstrated. This work demonstrates that CsPbBr3 /ZnO heterostructures are promising for the construction of high-performance photodetectors and other optoelectronic devices.