Decisive Role of Elevated Mobility in X55 and X60 Hole Transport Layers for High-Performance Perovskite Solar Cells

doi:10.1021/acsaem.1c01022

HFCAS OpenIR

	Decisive Role of Elevated Mobility in X55 and X60 Hole Transport Layers for High-Performance Perovskite Solar Cells
	Su, Zhenhuang 1,2,3; Hui, Wei 4,5; Dong, Yanan 1; Wang, Chenyue 1; Hu, Jinping 1,3; Shen, Kongchao 1; Wen, Wen 1; Xiong, Yimin 6; Cao, Liang 6; Chen, Yonghua4,5 ; Gao, Xingyu 1,7
	2021-08-23
发表期刊	ACS APPLIED ENERGY MATERIALS
ISSN	2574-0962
通讯作者	Cao, Liang(lcao@hmfl.ac.cn) ; Chen, Yonghua(iamyhchen@njtech.edu.cn) ; Gao, Xingyu(gaoxingyu@sinap.ac.cn)
摘要	Both the transport properties in the hole transport layer (HTL) and the interfacial energetics between the HTL and perovskite in perovskite solar cells (PSCs) play crucial roles in determining the PSC performance. To prioritize their roles for the rational design of PSCs, the transport properties and interfacial energetics of two spiro[fluorene-9,9'-xanthene]-based small-molecule species termed X55 and X60 molecules on the perovskite after different doping treatments along with the performance of the corresponding PSCs were systematically investigated. Although the interfacial energetics of both molecules deposited on the CH3NH3PbI3 perovskite were determined to be favorable for hole transfer/injection by the in situ photoemission study, the PSCs with these molecular HTLs are extremely inferior due to their poor HTL conductivity/mobility. While the interfacial energetics after LiTFSI/tBP doping either barely change in X60 or even become more favorable in X55, the hole mobility in both films only improves slightly, leading to the best power conversion efficiency (PCE) of only 4-6% for their corresponding PSCs. Even though the doping effect triggered by subsequent air exposure leads to an unwanted increase of the hole injection barrier, the hole mobility in these films increases by about 1 order of magnitude, which dramatically promotes the corresponding PSC performance with champion PCEs of 19.89% for X55-based PSCs and 19.15% for X60-based PSCs, respectively. Thus, it is the significantly elevated HTL hole mobility that decisively promotes the corresponding PSC performance dramatically, which implies that the high carrier mobility in the transport layers often could be more vital over interfacial energetics for high-performance PSCs.
关键词	charge transport properties doping effect photoemission spectroscopy band bending effect interfacial electronic structures energy level alignment photovoltaic application
DOI	10.1021/acsaem.1c01022
关键词[WOS]	ENERGY-LEVEL SHIFTS ; SPIRO-MEOTAD ; ORGANIC SEMICONDUCTORS ; IODINE MIGRATION ; LOW-COST ; EFFICIENT ; CRYSTALLIZATION ; HYSTERESIS ; IMPACT ; FILMS
收录类别	SCI
语种	英语
资助项目	National Key Research and Development Program of China[2017YFB0701900] ; National Key Research and Development Program of China[2017YFA0403400] ; National Key Research and Development Program of China[2017YFA0402900] ; National Natural Science Foundation of China[11675252] ; National Natural Science Foundation of China[U1632265] ; National Natural Science Foundation of China[12074385] ; High Magnetic Field Laboratory of Anhui Province
项目资助者	National Key Research and Development Program of China ; National Natural Science Foundation of China ; High Magnetic Field Laboratory of Anhui Province
WOS研究方向	Chemistry ; Energy & Fuels ; Materials Science
WOS类目	Chemistry, Physical ; Energy & Fuels ; Materials Science, Multidisciplinary
WOS记录号	WOS:000688250200029
出版者	AMER CHEMICAL SOC
引用统计	被引频次：3[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.hfcas.ac.cn:8080/handle/334002/125276
专题	中国科学院合肥物质科学研究院
通讯作者	Cao, Liang; Chen, Yonghua; Gao, Xingyu
作者单位	1.Chinese Acad Sci, Shanghai Adv Res Inst, Zhangjiang Lab, Shanghai Synchrotron Radiat Facil SSRF, Shanghai 201204, Peoples R China 2.Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai 201800, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.Nanjing Tech Univ Nanjing Tech, Key Lab Flexible Elect KLOFE, Nanjing 211816, Jiangsu, Peoples R China 5.Nanjing Tech Univ Nanjing Tech, Inst Adv Mat IAM, Nanjing 211816, Jiangsu, Peoples R China 6.Chinese Acad Sci, Anhui Key Lab Condensed Matter Phys Extreme Condi, High Magnet Field Lab, HFIPS, Hefei 230031, Anhui, Peoples R China 7.Chinese Acad Sci, Key Lab Interfacial Phys & Technol, Shanghai 201800, Peoples R China
推荐引用方式 GB/T 7714	Su, Zhenhuang,Hui, Wei,Dong, Yanan,et al. Decisive Role of Elevated Mobility in X55 and X60 Hole Transport Layers for High-Performance Perovskite Solar Cells[J]. ACS APPLIED ENERGY MATERIALS,2021,4.
APA	Su, Zhenhuang.,Hui, Wei.,Dong, Yanan.,Wang, Chenyue.,Hu, Jinping.,...&Gao, Xingyu.(2021).Decisive Role of Elevated Mobility in X55 and X60 Hole Transport Layers for High-Performance Perovskite Solar Cells.ACS APPLIED ENERGY MATERIALS,4.
MLA	Su, Zhenhuang,et al."Decisive Role of Elevated Mobility in X55 and X60 Hole Transport Layers for High-Performance Perovskite Solar Cells".ACS APPLIED ENERGY MATERIALS 4(2021).