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Influence of donor units on spiro[fluorene-9,9′-xanthene]-based dopant-free hole transporting materials for perovskite solar cells
Fu,Yajie1; Li,Yang2; Zeng,Qingliang1; Wu,Hanlun1; Wang,Lingyun1; Tang,Hao1; Xing,Guichuan2; Cao,Derong1
2021-03-01
Source PublicationSolar Energy
ISSN0038-092X
Volume216Pages:180-187
AbstractThree spiro[fluorene-9,9′-xanthene] (SFX)-based organic molecules with different donor units were synthesized and used as dopant-free hole-transport materials (HTMs) in perovskite solar cells (PSCs). The end-capping donor units on the SFX core are two methoxydiphenylamine-substituted diphenylamine (MDDPA), two and four methoxydiphenylamine-substituted carbazole (MDCZ) for SFX-2DPA, SFX-2CZ and SFX-4CZ, respectively. The structure-function relationship is systematically investigated as the impact of the different donor units upon the optical, electrochemical and photophysical properties of SFX-based HTMs. The PSCs based on SFX-2CZ attain the higher power conversion efficiency (PCE) of 15.83% than that based on SFX-2DPA (14.25%), due to higher molecular planarity of SFX-2CZ with enhanced hole transporting ability and the downshifted HOMO level. On other hands, SFX-4CZ has the lowest efficiency (12.19%) among three HTMs mainly due to its inferior film-forming ability. The results provide not only the new molecular design of dopant-free organic HTMs based on SFX core, but also a promising strategy to develop efficient HTMs with both the molecular planarity and number of donor groups being considered.
KeywordDonor units Dopant-free Hole-transporting materials Perovskite solar cells
DOI10.1016/j.solener.2021.01.004
URLView the original
Language英语
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Cited Times [WOS]:2   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionUniversity of Macau
Corresponding AuthorXing,Guichuan
Affiliation1.State Key Laboratory of Luminescent Materials and Devices,School of Chemistry and Chemical Engineering,South China University of Technology,Guangzhou,510641,China
2.Joint Key Laboratory of the Ministry of Education,Institute of Applied Physics and Materials Engineering,University of Macau,Macao
Corresponding Author AffilicationINSTITUTE OF APPLIED PHYSICS AND MATERIALS ENGINEERING
Recommended Citation
GB/T 7714
Fu,Yajie,Li,Yang,Zeng,Qingliang,et al. Influence of donor units on spiro[fluorene-9,9′-xanthene]-based dopant-free hole transporting materials for perovskite solar cells[J]. Solar Energy,2021,216:180-187.
APA Fu,Yajie,Li,Yang,Zeng,Qingliang,Wu,Hanlun,Wang,Lingyun,Tang,Hao,Xing,Guichuan,&Cao,Derong.(2021).Influence of donor units on spiro[fluorene-9,9′-xanthene]-based dopant-free hole transporting materials for perovskite solar cells.Solar Energy,216,180-187.
MLA Fu,Yajie,et al."Influence of donor units on spiro[fluorene-9,9′-xanthene]-based dopant-free hole transporting materials for perovskite solar cells".Solar Energy 216(2021):180-187.
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