Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 59, Issue 13, Pages 5303-5307Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201915022
Keywords
energy levels; hole transport material; perovskite solar cells; recombination kinetics; triphenylamines
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Funding
- MINECO [CTQ2013-47183, CTQ 2017-89814-P, SGR-AGAUR 2017SGR00978]
- ICREA
- Swiss National Science Foundation
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Three hole transport materials (HTMs) based on a substituted triphenylamine moiety have been synthesized and successfully employed in triple-cation mixed-halide PSCs, reaching efficiencies of 19.4 %. The efficiencies, comparable to those obtained using spiro-OMeTAD, point them out as promising candidates for easily attainable and cost-effective alternatives for PSCs, given their facile synthesis from commercially available materials. Interestingly, although all these HTMs show similar chemical and physical properties, they provide different carrier recombination kinetics. Our results demonstrate that is feasible through the molecular design of the HTM to minimize carrier losses and, thus, increase the solar cell efficiencies.
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