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

文献类型：期刊论文

作者Xu, Huifen4,5; Liang, Zheng4,5; Ye, Jiajiu5; Xu, Shendong4,5; Wang, Zihan4,5; Zhu, Liangzheng1; Chen, Xiaojing5; Xiao, Zhengguo2,3,4; Pan, Xu5; Liu, Guozhen5
刊名CHEMICAL ENGINEERING JOURNAL
出版日期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
DOI10.1016/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.
WOS关键词HIGHLY EFFICIENT ; PERFORMANCE ; VALENCE
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研究方向Engineering
语种英语
WOS记录号WOS:000779582200003
出版者ELSEVIER SCIENCE SA
资助机构Natural Science Foundation of Anhui Province ; CASHIPS Director's Fund ; National Natural Science Foundation of China
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, Anhui Prov Key Lab Condensed Matter Phys Extreme, High Magnet Field Lab, Hefei 230031, Peoples R China
2.Dept Phys, Hefei 230026, Peoples R China
3.Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Peoples R China
4.Univ Sci & Technol China, Hefei 230026, Peoples R China
5.Chinese Acad Sci, Inst Solid State Phys, Hefei Inst Phys Sci, Key Lab Photovolta & Energy Conservat Mat, 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).

入库方式： OAI收割

来源：合肥物质科学研究院

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