Guanidinium-assisted crystallization modulation and reduction of open-circuit voltage deficit for efficient planar FAPbBr3 perovskite solar cells

doi:10.1016/j.cej.2022.135181

	Guanidinium-assisted crystallization modulation and reduction of open-circuit voltage deficit for efficient planar FAPbBr3 perovskite solar cells
	Xu, Huifen 1,2; Liang, Zheng 1,2; Ye, Jiajiu 1; Xu, Shendong 1,2; Wang, Zihan 1,2; Zhu, Liangzheng 5; Chen, Xiaojing 1; Xiao, Zhengguo 2,3,4; Pan, Xu 1; Liu, Guozhen 1
刊名	CHEMICAL ENGINEERING JOURNAL
	2022-06-01
卷号	437
关键词	Wide-bandgap perovskites Pure-bromide perovskite solar cells Non-radiative recombination Open-circuit voltage loss
ISSN号	1385-8947
DOI	10.1016/j.cej.2022.135181
通讯作者	Xiao, Zhengguo(zhengguo@ustc.edu.cn) ; Pan, Xu(xpan@rntek.cas.cn) ; Liu, Guozhen(gzliu@issp.ac.cn)
英文摘要	The bromide-based perovskites with wide bandgap have attracted particular interests for the potential ability to serve as front sub-cells of monolithic all-perovskite triple junction tandem solar cells. However, non-radiative recombination induced by crystal defects could cause the massive open-circuit voltage (V-OC) losses, which severely disserves the performance of bromide-based perovskite solar cells. Hence, we incorporated guanidinium bromide (GABr) to modulate crystallization and heal charged defects of FAPbBr(3)-based solar cells. The introduction of GABr provides a non-wetting surface and suppresses heterogeneous nucleation, leading to larger grain size. Notably, nitrogen (N) atoms from GA(+) cations are in two differently charged environments, which are ionized ammonium group (-NH3+) and unsaturated N atoms in form of amine or imine group (-NH2 or = NH). Thus, GA(+) cations simultaneously heal both positively and negatively charged defects through multi-reactive sites with perovskite. Consequently, introduction of GABr releases microstrain and strengthens lattice structure, further transforms the perovskite from charge-rich to charge-natural region, which comprehensively leads to suppress non-radiative recombination. As a result, the high-quality planar FAPbBr3-based device yielded a PCE of 8.92% with a champion V-OC of 1.639 V, which is the highest value among FAPbBr3 solar cells up to date.
资助项目	Natural Science Foundation of Anhui Province[2108085J34] ; Natural Science Foundation of Anhui Province[2108085QE190] ; CASHIPS Director's Fund[YZJJ2021QN20] ; National Natural Science Foundation of China[11904366]
WOS关键词	HIGHLY EFFICIENT ; PERFORMANCE ; VALENCE
WOS研究方向	Engineering
语种	英语
出版者	ELSEVIER SCIENCE SA
WOS记录号	WOS:000779582200003
资助机构	Natural Science Foundation of Anhui Province ; CASHIPS Director's Fund ; National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/128621]
专题	中国科学院合肥物质科学研究院
通讯作者	Xiao, Zhengguo; Pan, Xu; Liu, Guozhen
作者单位	1.Chinese Acad Sci, Inst Solid State Phys, Hefei Inst Phys Sci, Key Lab Photovolta & Energy Conservat Mat, Hefei 230031, Peoples R China 2.Univ Sci & Technol China, Hefei 230026, Peoples R China 3.Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Peoples R China 4.Dept Phys, Hefei 230026, Peoples R China 5.Chinese Acad Sci, Anhui Prov Key Lab Condensed Matter Phys Extreme, High Magnet Field Lab, Hefei 230031, Peoples R China
推荐引用方式 GB/T 7714	Xu, Huifen,Liang, Zheng,Ye, Jiajiu,et al. Guanidinium-assisted crystallization modulation and reduction of open-circuit voltage deficit for efficient planar FAPbBr3 perovskite solar cells[J]. CHEMICAL ENGINEERING JOURNAL,2022,437.
APA	Xu, Huifen.,Liang, Zheng.,Ye, Jiajiu.,Xu, Shendong.,Wang, Zihan.,...&Liu, Guozhen.(2022).Guanidinium-assisted crystallization modulation and reduction of open-circuit voltage deficit for efficient planar FAPbBr3 perovskite solar cells.CHEMICAL ENGINEERING JOURNAL,437.
MLA	Xu, Huifen,et al."Guanidinium-assisted crystallization modulation and reduction of open-circuit voltage deficit for efficient planar FAPbBr3 perovskite solar cells".CHEMICAL ENGINEERING JOURNAL 437(2022).