Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 56, Issue 41, Pages 12658-12662Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201705965
Keywords
alloys; compositions; hybrid perovskites; bandgaps; solar cells; thin-film photovoltaics
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Funding
- National Science Foundation [DMR-1305913, OIA-1538893, DMR-1420645]
- National Natural Science Foundation of China [61674074]
- National Key Research and Development Program of China [2016YFB0401702]
- Office Of The Director
- Office of Integrative Activities [1538893] Funding Source: National Science Foundation
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The alloying behavior between FAPbI(3) and CsSnI3 perovskites is studied carefully for the first time, which has led to the realization of single-phase hybrid perovskites of (FAPbI(3))(1-x)(CsSnI3)(x) (0< x < 1) compositions with anomalous bandgaps. (FAPbI(3))(1-x)(CsSnI3)(x) perovskites exhibit stable, homogenous composition/microstructure at the nanoscale, as confirmed by microscopic characterization. The ideal bandgap of 1.3 eV for single-junction solar cell operation is achieved in the rationally-tailored (FAPbI(3))(0.7)(CsSnI3)(0.3)-composition perovskite. Solar cells based on this new perovskite show power conversion efficiency up to 14.6%.
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