Bi, DongqinMishra, AmareshGao, PengFranckevicius, MariusSteck, ChristopherZakeeruddin, Shaik MohammedNazeeruddin, Mohammad KhajaBaeuerle, PeterGraetzel, MichaelHagfeldt, Anders2016-07-162016-07-162016-07-16201610.1002/cssc.201501510https://infoscience.epfl.ch/handle/20.500.14299/127216WOS:000372191600003We developed a new donor--acceptor-type hole-transport material (HTMs) incorporating S,N-heteropentacene as -spacer, triarylamine as donor, and dicyanovinylene as acceptor. In addition to appropriate frontier molecular orbital energies, the new HTM showed high photo absorptivity in the visible region. Without the use of p-dopants, solution-processed mixed perovskite devices using the HTM achieved power conversion efficiencies of up to 16.9% and high photocurrents of up to 22.2mAcm(-2). These results demonstrate that heteroacene can be an excellent building block to prepare alternative HTMs for perovskite solar cells and hold promise for further advancement through fine-tuning the molecular structure.heteroacenehole-transport materialperovskitesolar cellspectroscopytext::journal::journal article::research article