Ferroic domains regulate photocurrent in single-crystalline CH3NH3PbI3 films self-grown on FTO/TiO2 substrate

	Ferroic domains regulate photocurrent in single-crystalline CH3NH3PbI3 films self-grown on FTO/TiO2 substrate
	Jinjin Zhao; Boyuan Huang; Guoli Kong; Ehsan Nasr Esfahani; Shulin Chen; Qian Li; Junxi Yu; , Ningan Xu; Ying Zhang; Shuhong Xie
刊名	npj Quantum Materials
	2018
文献子类	期刊论文
英文摘要	Photovoltaic conversion efficiency (PCE) of halide perovskite solar cells has risen spectacularly, yet the very crystalline structure of CH3NH3PbI3 remains ambiguous after extensive researches, and its polar nature remains hotly debated. Here we present compelling evidences that CH3NH3PbI3 crystals self-grown on FTO/TiO2 substrate consist of ferroic domains with alternating polar and nonpolar orders, in contrast to previous experimental and theoretical expectations, and polar domains possess reduced photocurrent. It is found that polar and nonpolar orders of CH3NH3PbI3 can be distinguished from their distinct lateral piezoresponse, energy dissipation, first and second harmonic electromechanical couplings, and temperature variation, even though their difference in crystalline lattice is very subtle, and they possess two-way memory effect through cubic-tetragonal phase transition. We hope these findings resolve key questions regarding polar nature of CH3NH3PbI3 and its implication on photovoltaics,reconcile contradictory data widely reported, and point a direction toward engineering ferroic domains for enhanced PCE.
URL标识	查看原文
语种	英语
内容类型	期刊论文
源URL	[http://ir.siat.ac.cn:8080/handle/172644/14396]
专题	深圳先进技术研究院_医工所
推荐引用方式 GB/T 7714	Jinjin Zhao,Boyuan Huang,Guoli Kong,et al. Ferroic domains regulate photocurrent in single-crystalline CH3NH3PbI3 films self-grown on FTO/TiO2 substrate[J]. npj Quantum Materials,2018.
APA	Jinjin Zhao.,Boyuan Huang.,Guoli Kong.,Ehsan Nasr Esfahani.,Shulin Chen.,...&Jiangyu Li.(2018).Ferroic domains regulate photocurrent in single-crystalline CH3NH3PbI3 films self-grown on FTO/TiO2 substrate.npj Quantum Materials.
MLA	Jinjin Zhao,et al."Ferroic domains regulate photocurrent in single-crystalline CH3NH3PbI3 films self-grown on FTO/TiO2 substrate".npj Quantum Materials (2018).