Chemical interaction dictated energy level alignment at the N,N '-dipentyl-3,4,9,10-perylenedicarboximide/CH3NH3PbI3 interface

doi:10.1063/1.5037624

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	Chemical interaction dictated energy level alignment at the N,N '-dipentyl-3,4,9,10-perylenedicarboximide/CH3NH3PbI3 interface
	Zhang, XN ; Su, ZH ; Zhao, B ; Yang, YG ; Xiong, YM ; Gao, XY ; Qi, DC ; Cao, L
刊名	APPLIED PHYSICS LETTERS
	2018
卷号	113 期号:11 页码:-
关键词	PEROVSKITE SOLAR-CELLS ASSISTED SOLUTION PROCESS ELECTRONIC-STRUCTURE CH(3)NH(3)PBL(3) PEROVSKITE PHOTOVOLTAIC EFFICIENCY ORGANIC SEMICONDUCTORS CH3NH3PBI3 PEROVSKITE SINGLE-CRYSTALS TRANSPORT LAYER THIN-FILMS
ISSN号	0003-6951
DOI	10.1063/1.5037624
文献子类	期刊论文
英文摘要	Here, we report the electronic structures at the N, N'-dipentyl-3,4,9,10-perylenedicarboximide (PTCDI-C5)/CH3NH3PbI3 interface identified in-situ by X-ray photoemission spectroscopy and ultraviolet photoemission spectroscopy. Strong chemical reactions are found to occur upon the deposition of PTCDI-C5 molecules on CH3NH3PbI3. Electron donation from PTCDI-C5 molecules to CH3NH3PbI3 leads to the filling of surface states and the emergence of an interfacial gap state with its onset tailed to the Fermi level. As a consequence, the downward surface band bending resulting from surface states acting as donor states at the pristine perovskite surface is reduced by 0.2 eV. After the energy level alignment at the interface is established, the perovskite conduction band minimum is found to be in line with the lowest unoccupied molecular orbital favoring the electron extraction with a moderate valence band maximum-highest occupied molecular orbital offset of , similar to 0.7 eV. The present results demonstrate that interfacial chemical reactions can dictate energetics at organic/perovskite interfaces. Understanding the chemical interaction and resultant electronic structures at those interfaces is crucial for efficient and long-term stable perovskite-based devices when passivation of chemical active sites and matched energy level could be readily reached. Published by AIP Publishing.
语种	英语
内容类型	期刊论文
源URL	[http://ir.sinap.ac.cn/handle/331007/30874]
专题	上海应用物理研究所_中科院上海应用物理研究所2011-2017年
作者单位	1.Queensland Univ Technol, Sch Chem Phys & Mech Engn, Brisbane, Qld 4001, Australia 2.Chinese Acad Sci, Shanghai Inst Appl Phys, 2019 Jia Luo Rd, Shanghai 201800, Peoples R China 3.Univ Chinese Acad Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China 4.Chinese Acad Sci, High Field Magnet Lab, Anhui Prov Key Lab Condensed Matter Phys Extreme, Hefei 230031, Anhui, Peoples R China 5.La Trobe Univ, La Trobe Inst Mol Sci, Dept Chem & Phys, Melbourne, Vic 3086, Australia
推荐引用方式 GB/T 7714	Zhang, XN,Su, ZH,Zhao, B,et al. Chemical interaction dictated energy level alignment at the N,N '-dipentyl-3,4,9,10-perylenedicarboximide/CH3NH3PbI3 interface[J]. APPLIED PHYSICS LETTERS,2018,113(11):-.
APA	Zhang, XN.,Su, ZH.,Zhao, B.,Yang, YG.,Xiong, YM.,...&Cao, L.(2018).Chemical interaction dictated energy level alignment at the N,N '-dipentyl-3,4,9,10-perylenedicarboximide/CH3NH3PbI3 interface.APPLIED PHYSICS LETTERS,113(11),-.
MLA	Zhang, XN,et al."Chemical interaction dictated energy level alignment at the N,N '-dipentyl-3,4,9,10-perylenedicarboximide/CH3NH3PbI3 interface".APPLIED PHYSICS LETTERS 113.11(2018):-.