Dithieno[3,2-b:2',3'-d]pyrrole Cored p-Type Semiconductors Enabling 20 % Efficiency Dopant-Free Perovskite Solar Cells.

Autor: Zhou J; School of Chemical Engineering, Nanjing University and Science and Technology, Nanjing, 210094, China., Yin X; School of Chemical Engineering, Nanjing University and Science and Technology, Nanjing, 210094, China., Dong Z; School of Chemical Engineering, Nanjing University and Science and Technology, Nanjing, 210094, China., Ali A; School of Chemical Engineering, Nanjing University and Science and Technology, Nanjing, 210094, China., Song Z; Department of Physics and Astronomy and Wright Center for Photovoltaics Innovation and Commercialization, The University of Toledo, Toledo, OH, 43606, USA., Shrestha N; Department of Physics and Astronomy and Wright Center for Photovoltaics Innovation and Commercialization, The University of Toledo, Toledo, OH, 43606, USA., Bista SS; Department of Physics and Astronomy and Wright Center for Photovoltaics Innovation and Commercialization, The University of Toledo, Toledo, OH, 43606, USA., Bao Q; Key Laboratory of Polar Materials and Devices, Department of Optoelectronics, East China Normal University, Shanghai, 200241, China., Ellingson RJ; Department of Physics and Astronomy and Wright Center for Photovoltaics Innovation and Commercialization, The University of Toledo, Toledo, OH, 43606, USA., Yan Y; Department of Physics and Astronomy and Wright Center for Photovoltaics Innovation and Commercialization, The University of Toledo, Toledo, OH, 43606, USA., Tang W; School of Chemical Engineering, Nanjing University and Science and Technology, Nanjing, 210094, China.
Jazyk: angličtina
Zdroj: Angewandte Chemie (International ed. in English) [Angew Chem Int Ed Engl] 2019 Sep 23; Vol. 58 (39), pp. 13717-13721. Date of Electronic Publication: 2019 Aug 19.
DOI: 10.1002/anie.201905624
Abstrakt: Organic p-type semiconductors with tunable structures offer great opportunities for hybrid perovskite solar cells (PVSCs). We report herein two dithieno[3,2-b:2',3'-d]pyrrole (DTP) cored molecular semiconductors prepared through π-conjugation extension and an N-alkylation strategy. The as-prepared conjugated molecules exhibit a highest occupied molecular orbital (HOMO) level of -4.82 eV and a hole mobility up to 2.16×10 -4  cm 2  V -1  s -1 . Together with excellent film-forming and over 99 % photoluminescence quenching efficiency on perovskite, the DTP based semiconductors work efficiently as hole-transporting materials (HTMs) for n-i-p structured PVSCs. Their dopant-free MA 0.7 FA 0.3 PbI 2.85 Br 0.15 devices exhibit a power conversion efficiency over 20 %, representing one of the highest values for un-doped molecular HTMs based PVSCs. This work demonstrates the great potential of using a DTP core in designing efficient semiconductors for dopant-free PVSCs.
(© 2019 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.)
Databáze: MEDLINE
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