Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 53, Issue 12, Pages 3151-3157Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201309361
Keywords
energy conversion; light harvesting; organic cations; perovskite solar cells; photovoltaics
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Funding
- Aisin Cosmos R&D Co., Ltd (Japan)
- European Union [ENERGY-261920, 308997]
- CCEM-CH in the 5th call proposal (DURSOL)
- Max Planck Society at the MPI for Solid State Research in Stuttgart (Germany)
- King Abdulaziz University, Jeddah
- Nanyang Technolocal University, Singapore for Adjunct Professor appointments
- European Research Council [ARG 247404]
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Hybrid organic-inorganic lead halide perovskite APbX(3) pigments, such as methylammonium lead iodide, have recently emerged as excellent light harvesters in solid-state mesoscopic solar cells. An important target for the further improvement of the performance of perovskite-based photovoltaics is to extend their optical-absorption onset further into the red to enhance solar-light harvesting. Herein, we show that this goal can be reached by using a mixture of formamidinium (HN=CHNH3+, FA) and methylammonium (CH3NH3+, MA) cations in the Aposition of the APbI(3) perovskite structure. This combination leads to an enhanced short-circuit current and thus superior devices to those based on only CH3NH3+. This concept has not been applied previously in perovskite-based solar cells. It shows great potential as a versatile tool to tune the structural, electrical, and optoelectronic properties of the light-harvesting materials.
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