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ChemSusChem. 2014 Dec;7(12):3420-5. doi: 10.1002/cssc.201402587. Epub 2014 Sep 18.

Hole-transporting small molecules based on thiophene cores for high efficiency perovskite solar cells.

Author information

1
Energy Research Institute @ NTU (ERI@N), School of Materials Science and Engineering, Nanyang Technological University, Nanyang Avenue, Singapore 637553.

Abstract

Two new electron-rich molecules, 2,3,4,5-tetra[4,4'-bis(methoxyphenyl)aminophen-4"-yl]-thiophene (H111) and 4,4',5,5'-tetra[4,4'-bis(methoxyphenyl)aminophen-4"-yl]-2,2'-bithiophene (H112), which contain thiophene cores with arylamine side groups, are reported. When used as the hole-transporting material (HTM) in perovskite-based solar cell devices, power conversion efficiencies of up to 15.4% under AM 1.5G solar simulation were obtained. This is the highest efficiency achieved with HTMs not composed of 2,2',7,7'-tetrakis(N,N'-di-p-methoxyphenylamine)-9,9'-spirobifluorene (spiro-OMeTAD) and its isomers. Both HTMs, especially H111, have great potential to replace expensive spiro-OMeTAD given their much simpler and less expensive syntheses.

KEYWORDS:

dyes/pigments; electrochemistry; heterocycles; perovskite phases; solar cells

PMID:
25233841
DOI:
10.1002/cssc.201402587
[Indexed for MEDLINE]

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