DOI: 10.1016/j.scib.2020.04.018
论文题名: Reducing current fluctuation of Cs3Bi2Br9 perovskite photodetectors for diffuse reflection imaging with wide dynamic range
作者: Ji Z. ; Liu Y. ; Li W. ; Zhao C. ; Mai W.
刊名: Science Bulletin
ISSN: 20959273
出版年: 2020
卷: 65, 期: 16 起始页码: 1371
结束页码: 1379
语种: 英语
中文关键词: Cs3Bi2Br9 perovskites
; Current fluctuations
; Diffuse reflection imaging
; Photodetectors
英文关键词: Atomic layer deposition
; Bromine compounds
; Imaging techniques
; Metal halides
; Perovskite
; Photodetectors
; Photons
; Current fluctuations
; Diffuse reflection
; Halide perovskites
; Imaging performance
; Imaging quality
; Perovskite films
; Photodetectors (PDs)
; Wide dynamic range
; Bismuth compounds
英文摘要: Recently, the newly booming metal halide perovskites have attracted extensive attention worldwide due to their outstanding optoelectronic performance, and are expected to be ideal candidates for photodetectors (PDs). However, there is still lack of perovskite PDs-based imaging devices coming into commercialization stage, due to some practical reasons including toxicity brought by lead-based perovskites and the large light current fluctuations. In this paper, for the first time we fabricate a lead-free Cs3Bi2Br9 perovskite PD, and build a prototype of this perovskite PD-based imaging system with diffuse reflection imaging mode. Moreover, we propose a new parameter F related to light current fluctuation to evaluate imaging performance of a PD especially for weak diffuse light condition, and prove its usability by comparison of unoptimized lead-free Cs3Bi2Br9 perovskite PD and atomic layer deposition (ALD) optimized Cs3Bi2Br9 PD. ALD-optimization can improve the quality of perovskite film and suppress the dark current and current fluctuation. Finally, we obtain satisfactory diffuse reflection images of 2D and 3D objects with wide dynamic range. Therefore, the ALD-optimized Cs3Bi2Br9 PD has addressed two major concerns about perovskite PDs-based imaging devices, that may extend application of perovskite materials and improve imaging quality. © 2020 Science China Press Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/169929
Appears in Collections: 气候变化与战略
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作者单位: Siyuan Laboratory, Guangdong Provincial Engineering Technology Research Center of Vacuum Coating Technologies and New Energy Materials, Department of Physics, Jinan University, Guangzhou, 510632, China
Recommended Citation:
Ji Z.,Liu Y.,Li W.,et al. Reducing current fluctuation of Cs3Bi2Br9 perovskite photodetectors for diffuse reflection imaging with wide dynamic range[J]. Science Bulletin,2020-01-01,65(16)