Interfacial-engineering enhanced performance and stability of ZnO nanowire-based perovskite solar cells. (1st September 2021)

• Record Type: Journal Article
• Authors: Sun, Junlu; Li, Nengxu; Dong, Lin; Niu, Xiuxiu; Zhao, Mengqi; Xu, Ziqi; Zhou, Huanping; Shan, Chongxin; Pan, Caofeng
• Is Part Of: Nanotechnology. Volume 32:Number 47(2021)
• Publication Date: 2021-09-01
• Subjects: perovskite solar cell -- gradient energy band -- interfacial passivation -- stability; Nanotechnology -- Periodicals; Nanotechnology -- Periodicals; Nanotechnology; Publications périodiques; Nanotechnologies; Periodicals; 620.5
• DOI: 10.1088/1361-6528/abdbeb
• Languages: English
• ISSNs: 0957-4484

Abstract

Abstract: Perovskite solar cells (PSCs) have attracted extensive attention due to their convenient fabrication and excellent photoelectric characteristics. The highest power conversion efficiency (PCE) of over 25% has been realized. However, ZnO as electron transport layer based PSCs exhibit inferior PCE and stability because of the mismatched energy-band and undesirable interfacial recombination. Here, we introduce a thin layer of SnO2 nanocrystals to construct an interfacial engineering with gradient energy band and interfacial passivation via a facile wet chemical process at a low temperature. The best PCE obtained in this study reaches 18.36%, and the stability is substantially improved and maintains a PCE of almost 100% over 500 h. The low-temperature fabrication process facilitates the future application of ZnO/SnO2 -based PSCs in flexible and stretchable electronics.