A Breakthrough Efficiency of 19.9% Obtained in Inverted Perovskite Solar   Cells by Using an Efficient Trap State Passivator Cu(thiourea)I

doi:10.1021/jacs.7b01439

CORC > 北京大学 > 化学与分子工程学院

	A Breakthrough Efficiency of 19.9% Obtained in Inverted Perovskite Solar Cells by Using an Efficient Trap State Passivator Cu(thiourea)I
	Ye, Senyun ; Rao, Haixia ; Zhao, Ziran ; Zhang, Linjuan ; Bao, Hongliang ; Sun, Weihai ; Li, Yunlong ; Gu, Feidan ; Wang, Jianqiang ; Liu, Zhiwei ; Bian, Zuqiang ; Huang, Chunhui
刊名	JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
	2017
关键词	LEAD IODIDE PEROVSKITES HOLE-CONDUCTOR-FREE HALIDE PEROVSKITES TRANSPORTING LAYER PHOTOVOLTAIC CELLS LOW-TEMPERATURE FILL-FACTOR THIN-FILMS PLANAR PERFORMANCE
DOI	10.1021/jacs.7b01439
英文摘要	It is extremely significant to study the trap state passivation and minimize the trap states of perovskite to achieve high-performance perovskite solar cells (PSCs). Here, we have first revealed and demonstrated that a novel p-type conductor Cu(thiourea)I [Cu(Tu)I] incorporated in perovskite layer can effectively passivate the trap states of perovskite via interacting with the under-coordinated metal cations and halide anions at the perovskite crystal surface. The trap state energy level of perovskite can be shallowed from 0.35-0.45 eV to 0.25-0.35 eV. In addition, the incorporated Cu(Tu)I can participate in constructing the p-i bulk heterojunctions with perovskite, leading to an increase of the depletion width from 126 to 265 nm, which is advantageous for accelerating hole transport and reducing charge carrier recombination. For these two synergistic effects, Cu(Tu)I can play a much better role than that of the traditional p-type conductor CuI, probably due to its identical valence band maximum with that of perovskite, which enables to not only lower the trap state energy level to a greater extent but also eliminate the potential wells for holes at the p-i heterojunctions. After optimization, a breakthrough efficiency of 19.9% has been obtained in the inverted PSCs with Cu(Tu)I as the trap state passivator of perovskite.; Beijing National Laboratory of Molecular Sciences; National Basic Research Program [2011CB933303]; National Natural Science Foundation of China (NSFC) [21321001, 21371012]; SCI(E); ARTICLE; 22; 7504-7512; 139
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/472865]
专题	化学与分子工程学院
推荐引用方式 GB/T 7714	Ye, Senyun,Rao, Haixia,Zhao, Ziran,et al. A Breakthrough Efficiency of 19.9% Obtained in Inverted Perovskite Solar Cells by Using an Efficient Trap State Passivator Cu(thiourea)I[J]. JOURNAL OF THE AMERICAN CHEMICAL SOCIETY,2017.
APA	Ye, Senyun.,Rao, Haixia.,Zhao, Ziran.,Zhang, Linjuan.,Bao, Hongliang.,...&Huang, Chunhui.(2017).A Breakthrough Efficiency of 19.9% Obtained in Inverted Perovskite Solar Cells by Using an Efficient Trap State Passivator Cu(thiourea)I.JOURNAL OF THE AMERICAN CHEMICAL SOCIETY.
MLA	Ye, Senyun,et al."A Breakthrough Efficiency of 19.9% Obtained in Inverted Perovskite Solar Cells by Using an Efficient Trap State Passivator Cu(thiourea)I".JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2017).