Enhancement of 3D/2D Perovskite Solar Cells Using an F4TCNQ Molecular Additive

doi:10.1021/acsaem.0c00553

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	Enhancement of 3D/2D Perovskite Solar Cells Using an F4TCNQ Molecular Additive
	Sun, Jingsong ; Chandrasekaran, Naresh ; Liu, Chang ; Scully, Andrew D.; Yin, Wenping ; Ng, Chun Kiu ; Jasieniak, Jacek J.
刊名	ACS APPLIED ENERGY MATERIALS
	2020
卷号	3 期号:9 页码:8205-8215
关键词	HALIDE PEROVSKITE HIGHLY EFFICIENT RECOMBINATION STABILITY
DOI	10.1021/acsaem.0c00553
英文摘要	Recent developments in hybrid organic-inorganic lead halide perovskite solar cells (PSCs) have shown that use of a 2-dimensional (2D) perovskite capping layer on a 3D perovskite absorber layer (3D/2D PSCs) results in substantially improved environmental stability of the devices. However, in these 3D/2D PSC structures the poor charge transporting properties through the 2D layer hinder device performance, particularly for thicker 2D layers. Here, we report a facile method that overcomes some of the inherent challenges in using such 2D capping layers through the introduction of 2,3,5,6-tetrafluoro-7,7,8,8-tetracyanoquinodimethane (F4TCNQ) as a molecular additive into the 2D layer. It is found that this additive undergoes partial charge transfer with the perovskite layer to provide a passivation effect, which also modifies the crystalline domain sizes of the 2D perovskite. PSCs incorporating a F4TCNQ-modified 2D capping layer grown in situ on top of the 3D Cs/MA/FA mixed-cation perovskite absorber layer display modified interfacial characteristics that yield improved charge extraction and reduced charge recombination compared with 3D/2D PSCs comprising an unmodified 2D capping layer. This modification results in 3D/2D PSCs for which the maximum power conversion efficiency is increased to more than 20% compared with 18.2% for unmodified 2D capping layers.
学科主题	Chemistry ; Energy & Fuels ; Materials Science
内容类型	期刊论文
源URL	[http://ir.nimte.ac.cn/handle/174433/20474]
专题	2020专题
作者单位	1.Jasieniak, JJ (corresponding author), Monash Univ, ARC Ctr Excellence Exciton Sci, Clayton, Vic 3800, Australia. 2.Jasieniak, JJ (corresponding author), Monash Univ, Dept Mat Sci & Engn, Clayton, Vic 3800, Australia.
推荐引用方式 GB/T 7714	Sun, Jingsong,Chandrasekaran, Naresh,Liu, Chang,et al. Enhancement of 3D/2D Perovskite Solar Cells Using an F4TCNQ Molecular Additive[J]. ACS APPLIED ENERGY MATERIALS,2020,3(9):8205-8215.
APA	Sun, Jingsong.,Chandrasekaran, Naresh.,Liu, Chang.,Scully, Andrew D..,Yin, Wenping.,...&Jasieniak, Jacek J..(2020).Enhancement of 3D/2D Perovskite Solar Cells Using an F4TCNQ Molecular Additive.ACS APPLIED ENERGY MATERIALS,3(9),8205-8215.
MLA	Sun, Jingsong,et al."Enhancement of 3D/2D Perovskite Solar Cells Using an F4TCNQ Molecular Additive".ACS APPLIED ENERGY MATERIALS 3.9(2020):8205-8215.