Dopant-free 3,3′-bithiophene derivatives as hole transport materials for perovskite solar cells†,10.1039/C6TA00032K

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Dopant-free 3,3′-bithiophene derivatives as hole transport materials for perovskite solar cells†

Genfei Gong,Ning Zhao,Debin Ni,Jianyou Chen,Yan Shen,Mingkui Wang,Guoli Tu

Journal of Materials Chemistry A Pub Date : 02/10/2016 00:00:00 , DOI:10.1039/C6TA00032K

Abstract

Three 3,3′-bithiophene derivatives (DHPT-SC, DOPT-SC and DEPT-SC) have been efficiently synthesized by a Stille reaction. X-ray diffraction analysis revealed unique swivel-cruciform configurations and weak intermolecular π–π stacking in these materials. Perovskite solar cells using these pristine hole transport materials without dopants have achieved power conversion efficiencies of 8.35%, 8.69%, and 9.73% with good air stability. This present finding develops dopant-free hole transport materials for perovskite solar cells.