气候变化领域集成服务门户(CCPortal): Constructing an n/n+homojunction in a monolithic perovskite film for boosting charge collection in inverted perovskite photovoltaics

CCPortal

DOI	10.1039/d1ee00918d
	Constructing an n/n+homojunction in a monolithic perovskite film for boosting charge collection in inverted perovskite photovoltaics
	Lu Y.-N.; Zhong J.-X.; Yu Y.; Chen X.; Yao C.-Y.; Zhang C.; Yang M.; Feng W.; Jiang Y.; Tan Y.; Gong L.; Wei X.; Zhou Y.; Wang L.; Wu W.-Q.
发表日期	2021
ISSN	17545692
起始页码	4048
结束页码	4058
卷号	14 期号:7
英文摘要	The suboptimal carrier dynamics at the perovskite/electron transport layer has largely limited the further performance enhancement of the state-of-the-art inverted p-i-n structured perovskite solar cells. Herein, we discovered that a simple surface modification of the perovskite film by a trivalent metal halide salt, InBr3, could convert the doping levels of the top surface to be more n-type, which spontaneously formed an intriguing n/n+ homojunction between the bulk (weak n type (n) component) and the surface (more n-type (n+) component) in a monolithic perovskite film. This brought about synergistic advantages of the enlarged built-in electric field for facilitated charge separation, as well as optimized electronic energy level alignment and minimized electron injection barrier at the perovskite/C60 interface, leading to both accelerated charge extraction and suppressed interfacial charge recombination. Blade-coated inverted PSCs with n/n+ homojunctions achieved a high power conversion efficiency (PCE) of up to 22.2%, narrowing the efficiency gap with their conventional n-i-p counterparts. The InBr3 surface treatment also improved the operational stability to >1000 hours under light with 93% initial efficiency retained. © The Royal Society of Chemistry.
英文关键词	Bromine compounds; Conversion efficiency; Electric fields; Indium compounds; Metal halides; Perovskite; Semiconductor devices; Semiconductor doping; Surface treatment; Built-in electric fields; Charge separations; Electron-injection barrier; Electronic energy levels; High power conversion; Interfacial charge; Operational stability; Performance enhancements; Perovskite solar cells; electric field; electrode; electron; film; performance assessment; perovskite; photovoltaic system
语种	英语
来源期刊	Energy & Environmental Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/190629
作者单位	Moe Key Laboratory of Bioinorganic and Synthetic Chemistry, Lehn Institute of Functional Materials, School of Chemistry, Sun Yat-sen University, Guangzhou, 510275, China; School of Materials Science and Engineering, Sun Yat-sen University, Guangzhou, 510275, China; Micro-nano Manufacturing and System Integration Center, Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing, 400714, China; Nanomaterials Centre, School of Chemical Engineering, Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, Brisbane, QLD 4072, Australia; College of Biological and Chemical Engineering, Guangxi University of Science and Technology, Liuzhou, 545006, China; Instrumental Analysis Research Center, Sun Yat-sen University, Guangzhou, 510275, China
推荐引用方式 GB/T 7714	Lu Y.-N.,Zhong J.-X.,Yu Y.,et al. Constructing an n/n+homojunction in a monolithic perovskite film for boosting charge collection in inverted perovskite photovoltaics[J],2021,14(7).
APA	Lu Y.-N..,Zhong J.-X..,Yu Y..,Chen X..,Yao C.-Y..,...&Wu W.-Q..(2021).Constructing an n/n+homojunction in a monolithic perovskite film for boosting charge collection in inverted perovskite photovoltaics.Energy & Environmental Science,14(7).
MLA	Lu Y.-N.,et al."Constructing an n/n+homojunction in a monolithic perovskite film for boosting charge collection in inverted perovskite photovoltaics".Energy & Environmental Science 14.7(2021).