Revealing photovoltaic behavior in 2D hybrid perovskite ferroelectric single-crystalline microwire arrays for self-powered photodetectors. (November 2022)

• Record Type: Journal Article
• Authors: Ding, Ran; Lyu, Yongxin; Zhao, Yuqian; Wu, Zehan; Guo, Feng; Io, Weng Fu; Pang, Sin-Yi; Mao, Jianfeng; Wong, Man-Chung; Wong, Lok Wing; Yan, Cenqi; Yu, Jiangsheng; Zhao, Jiong; Li, Gang; Hao, Jianhua
• Is Part Of: Materials today physics. Volume 28(2022)
• Publication Date: 2022-11
• Subjects: Hybrid perovskite ferroelectrics -- Single-crystalline microwire arrays -- Ferroelectric photovoltaics -- Ion migration effects -- Self-powered photodetectors; Materials science -- Periodicals; Physics -- Periodicals; Electronic journals; 530.41
• DOI: 10.1016/j.mtphys.2022.100867
• Languages: English
• ISSNs: 2542-5293

Abstract

Abstract: Hybrid perovskite ferroelectrics produce a revival of interest in ferroelectric photovoltaics because of the robust ferroelectricity coexisting with superior semiconducting properties. An electric field via perovskite ferroelectrics can affect their photovoltaic behavior; however, the fundamental understanding of the electric-field-induced effects remains comparatively elusive. Herein, (EA)2 (MA)2 Pb3 Br10 single-crystalline microwire arrays (MWs) are synthesized for the fabrication of self-powered photodetectors and characterized with evident in-plane multiaxial ferroelectricity by piezoresponse force microscopy (PFM) measurements. Upon systematic investigations via a dynamic poling process, including electrical-poling-dependent photocurrent, Kelvin probe force microscopy (KPFM) mapping and ferroelectric polarization switching, we reveal that the coupling of ion migration and ferroelectric photovoltaic effect dominate the photovoltaic behavior within (EA)2 (MA)2 Pb3 Br10 MWs. Such electric-field-induced effects are responsible for the self-powered ability in (EA)2 (MA)2 Pb3 Br10 MWs-based photodetectors with accelerated response time, switchable photoelectric responses and large short-circuit current density. Our findings provide fundamental insight into the photovoltaic behavior under an electric field in perovskite ferroelectrics, and the electrical-poling-manipulated dynamics pave the way for innovative self-powered optoelectronic devices. Graphical abstract: Self-powered photodetectors based on (EA)2 (MA)2 Pb3 Br10 single-crystalline microwire arrays exhibit accelerated response time and switchable photoelectric responses with high current density. We reveal that the coupling of ion migration and ferroelectric photovoltaic effect dominates the photovoltaic behavior within (EA)2 (MA)2 Pb3 Br10 MWs. Such electric-field-induced effects are responsible for the self-powered ability in perovskite ferroelectrics, and pave the way for innovative self-powered optoelectronic devices. Image 1 Highlights: (EA)2 (MA)2 Pb3 Br10 MWs are synthesized for self-powered photodetectors. (EA)2 (MA)2 Pb3 Br10 MWs are characterized with in-plane multiaxial ferroelectricity. Photovoltaic behavior is clarified for self-powered ability in (EA)2 (MA)2 Pb3 Br10 . Self-powered photodetectors exhibit enhanced photoelectric response.