Ligand-assisted cation-exchange engineering for high-efficiency colloidal Cs(1-x)FA(x)PbI(3) quantum dot solar cells with reduced phase segregation

doi:10.1038/s41560-019-0535-7

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	Ligand-assisted cation-exchange engineering for high-efficiency colloidal Cs(1-x)FA(x)PbI(3) quantum dot solar cells with reduced phase segregation
	Hao, Mengmeng 5; Bai, Yang 5; Zeiske, Stefan 1; Ren, Long 10; Liu, Junxian 8,9; Yuan, Yongbo 7; Zarrabi, Nasim 1; Cheng, Ningyan 10; Ghasemi, Mehri 5; Chen, Peng 5
刊名	NATURE ENERGY
	2020
卷号	5 期号:1 页码:79-88
ISSN号	2058-7546
DOI	10.1038/s41560-019-0535-7
通讯作者	Bai, Yang(y.bai@uq.edu.au) ; Wang, Lianzhou(l.wang@uq.edu.au)
英文摘要	Mixed-cation perovskite quantum dot solar cells possess decent phase stability but considerably low efficiency. Here Hao et al. show that ligands are key to the formation of quantum dots with lower defect density and demonstrate devices that are more stable and efficient than their bulk counterparts. The mixed caesium and formamidinium lead triiodide perovskite system (Cs(1-x)FA(x)PbI(3)) in the form of quantum dots (QDs) offers a pathway towards stable perovskite-based photovoltaics and optoelectronics. However, it remains challenging to synthesize such multinary QDs with desirable properties for high-performance QD solar cells (QDSCs). Here we report an effective oleic acid (OA) ligand-assisted cation-exchange strategy that allows controllable synthesis of Cs(1-x)FA(x)PbI(3) QDs across the whole composition range (x = 0-1), which is inaccessible in large-grain polycrystalline thin films. In an OA-rich environment, the cross-exchange of cations is facilitated, enabling rapid formation of Cs(1-x)FA(x)PbI(3) QDs with reduced defect density. The hero Cs(0.5)FA(0.5)PbI(3) QDSC achieves a certified record power conversion efficiency (PCE) of 16.6% with negligible hysteresis. We further demonstrate that the QD devices exhibit substantially enhanced photostability compared with their thin-film counterparts because of suppressed phase segregation, and they retain 94% of the original PCE under continuous 1-sun illumination for 600 h.
资助项目	Australian Research Council Discovery Projects (ARC DPs) ; UQ Development Fellowship ; ARC DECRA Fellowship[DE190101351] ; ARC[LE0882813] ; ARC[LE120100104] ; ARC[DP160102627] ; ARC[DP170101467] ; ARC[FT180100585] ; Australian Commonwealth Government ; Pawsey Supercomputing Centre in Perth ; Australian Government ; Government of Western Australia ; Ser Cymru II (Welsh European Funding Office) Program 'Sustainable Advanced Materials' ; Ser Cymru II (European Regional Development Fund) Program 'Sustainable Advanced Materials' ; National Natural Science Foundation of China[51629201] ; National Natural Science Foundation of China[51825204]
WOS研究方向	Energy & Fuels ; Materials Science
语种	英语
出版者	NATURE PUBLISHING GROUP
WOS记录号	WOS:000508323000004
资助机构	Australian Research Council Discovery Projects (ARC DPs) ; UQ Development Fellowship ; ARC DECRA Fellowship ; ARC ; Australian Commonwealth Government ; Pawsey Supercomputing Centre in Perth ; Australian Government ; Government of Western Australia ; Ser Cymru II (Welsh European Funding Office) Program 'Sustainable Advanced Materials' ; Ser Cymru II (European Regional Development Fund) Program 'Sustainable Advanced Materials' ; National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/136783]
专题	金属研究所_中国科学院金属研究所
通讯作者	Bai, Yang; Wang, Lianzhou
作者单位	1.Univ Queensland, Sch Chem Engn, St Lucia, Qld, Australia 2.Univ Surrey, Adv Technol Inst, Guildford, Surrey, England 3.Tsinghua Univ, Tsinghua Berkeley Shenzhen Inst, Shenzhen Geim Graphene Ctr, Shenzhen, Peoples R China 4.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang, Peoples R China 5.Univ Queensland, Australian Inst Bioengn & Nanotechnol, Nanomat Ctr, St Lucia, Qld, Australia 6.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang, Peoples R China 7.Cent S Univ, Sch Phys & Elect, Inst Super Microstruct & Ultrafast Proc Adv Mat, Changsha, Peoples R China 8.Griffith Univ, Ctr Clean Environm & Energy, Sch Environm & Sci, Gold Coast, Qld, Australia 9.Univ Wollongong, Australian Inst Innovat Mat, Inst Superconducting & Elect Mat, Wollongong, NSW, Australia 10.Swansea Univ, Dept Phys, Swansea, W Glam, Wales
推荐引用方式 GB/T 7714	Hao, Mengmeng,Bai, Yang,Zeiske, Stefan,et al. Ligand-assisted cation-exchange engineering for high-efficiency colloidal Cs(1-x)FA(x)PbI(3) quantum dot solar cells with reduced phase segregation[J]. NATURE ENERGY,2020,5(1):79-88.
APA	Hao, Mengmeng.,Bai, Yang.,Zeiske, Stefan.,Ren, Long.,Liu, Junxian.,...&Wang, Lianzhou.(2020).Ligand-assisted cation-exchange engineering for high-efficiency colloidal Cs(1-x)FA(x)PbI(3) quantum dot solar cells with reduced phase segregation.NATURE ENERGY,5(1),79-88.
MLA	Hao, Mengmeng,et al."Ligand-assisted cation-exchange engineering for high-efficiency colloidal Cs(1-x)FA(x)PbI(3) quantum dot solar cells with reduced phase segregation".NATURE ENERGY 5.1(2020):79-88.