气候变化领域集成服务门户(CCPortal): Reducing current fluctuation of Cs3Bi2Br9 perovskite photodetectors for diffuse reflection imaging with wide dynamic range

CCPortal

DOI	10.1016/j.scib.2020.04.018
	Reducing current fluctuation of Cs3Bi2Br9 perovskite photodetectors for diffuse reflection imaging with wide dynamic range
	Ji Z.; Liu Y.; Li W.; Zhao C.; Mai W.
发表日期	2020
ISSN	20959273
起始页码	1371
结束页码	1379
卷号	65 期号:16
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
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
语种	英语
来源期刊	Science Bulletin
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/207073
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
推荐引用方式 GB/T 7714	Ji Z.,Liu Y.,Li W.,et al. Reducing current fluctuation of Cs3Bi2Br9 perovskite photodetectors for diffuse reflection imaging with wide dynamic range[J],2020,65(16).
APA	Ji Z.,Liu Y.,Li W.,Zhao C.,&Mai W..(2020).Reducing current fluctuation of Cs3Bi2Br9 perovskite photodetectors for diffuse reflection imaging with wide dynamic range.Science Bulletin,65(16).
MLA	Ji Z.,et al."Reducing current fluctuation of Cs3Bi2Br9 perovskite photodetectors for diffuse reflection imaging with wide dynamic range".Science Bulletin 65.16(2020).