Introduction of 4-hydroxybenzaldehyde as interface modifier with multidimensional defects passivation effect for high-performance perovskite solar cells

doi:10.1016/j.apsusc.2021.151259

	Introduction of 4-hydroxybenzaldehyde as interface modifier with multidimensional defects passivation effect for high-performance perovskite solar cells
	Wu, Weiwei 1,2; Xu, Huifen 1,2,3; Liu, Guozhen 3; Zheng, Haiying 1,2; Pan, Xu 3
刊名	APPLIED SURFACE SCIENCE
	2021-12-30
卷号	570
关键词	Perovskite solar cells Interface modification 4-hydroxybenzaldehyde Defect passivation Stability
ISSN号	0169-4332
DOI	10.1016/j.apsusc.2021.151259
通讯作者	Zheng, Haiying(hyzheng@ahu.edu.cn)
英文摘要	The various types of surfaced point defects and grain boundaries (GBs) of perovskite films have become an obstacle to the development of the overall power conversion efficiency (PCE) and long-term stability of perovskite solar cells (PSCs). Recently, the interfacial modification engineering has been demonstrated as an efficient strategy to reduce defects density and suppress non-radiative recombination. Herein, we report a novel interfacial modification material, 4-hydroxybenzaldehyde (HBA) with multifunctional groups (-CHO and -OH) to modify the interface between perovskite film and hole transport layer (HTL). It is found that the HBA interfacial modifier cannot only passivate one-dimensional point defects, including uncoordinated lead ion (Pb2+) and FA+/ MA+ vacancies by coordination interaction or hydrogen bond, but also passivate two-dimensional extended defects via promoting secondary growth of grains to reduce the number of GBs. Consequently, the PCE is significantly improved from 18.84% for the control device to 20.89% for HBA-modified device. Meanwhile, the device with HBA interfacial modifier exhibits negligible hysteresis and excellent environmental stability against humidity and thermal. This study provides important insight to reasonably design passivation molecular structure for obtaining highly efficient and stable PSCs.
资助项目	Natural Science Foundation of Anhui Province[2008085QE208] ; CASHIPS Director's Fund[YZJJ2021QN20]
WOS关键词	HALIDE PEROVSKITES ; EFFICIENT ; LENGTHS
WOS研究方向	Chemistry ; Materials Science ; Physics
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000722425100004
资助机构	Natural Science Foundation of Anhui Province ; CASHIPS Director's Fund
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/126722]
专题	中国科学院合肥物质科学研究院
通讯作者	Zheng, Haiying
作者单位	1.Anhui Univ, Inst Phys Sci, Hefei 230601, Peoples R China 2.Anhui Univ, Inst Informat Technol, Hefei 230601, Peoples R China 3.Chinese Acad Sci, Hefei Inst Phys Sci, Inst Solid State Phys, Key Lab Photovolta & Energy Conservat Mat, Hefei 230031, Peoples R China
推荐引用方式 GB/T 7714	Wu, Weiwei,Xu, Huifen,Liu, Guozhen,et al. Introduction of 4-hydroxybenzaldehyde as interface modifier with multidimensional defects passivation effect for high-performance perovskite solar cells[J]. APPLIED SURFACE SCIENCE,2021,570.
APA	Wu, Weiwei,Xu, Huifen,Liu, Guozhen,Zheng, Haiying,&Pan, Xu.(2021).Introduction of 4-hydroxybenzaldehyde as interface modifier with multidimensional defects passivation effect for high-performance perovskite solar cells.APPLIED SURFACE SCIENCE,570.
MLA	Wu, Weiwei,et al."Introduction of 4-hydroxybenzaldehyde as interface modifier with multidimensional defects passivation effect for high-performance perovskite solar cells".APPLIED SURFACE SCIENCE 570(2021).