A Layered Hybrid Perovskite Solar-Cell Absorber with Enhanced Moisture Stability

Autor:	Eric T. Hoke, Michael D. McGehee, Diego Solis-Ibarra, Hemamala I. Karunadasa, Ian C. P. Smith
Rok vydání:	2014
Předmět:	Spin coating Fabrication Materials science Band gap business.industry Annealing (metallurgy) Energy conversion efficiency Perovskite solar cell Mineralogy General Chemistry General Medicine Catalysis Photovoltaics Optoelectronics business Perovskite (structure)
Zdroj:	Angewandte Chemie. 126:11414-11417
ISSN:	0044-8249
DOI:	10.1002/ange.201406466
Popis:	Two-dimensional hybrid perovskites are used as absorbers in solar cells. Our first-generation devices containing (PEA)2(MA)2[Pb3I10] (1; PEA=C6H5(CH2)2NH3(+), MA=CH3NH3(+)) show an open-circuit voltage of 1.18 V and a power conversion efficiency of 4.73%. The layered structure allows for high-quality films to be deposited through spin coating and high-temperature annealing is not required for device fabrication. The 3D perovskite (MA)[PbI3] (2) has recently been identified as a promising absorber for solar cells. However, its instability to moisture requires anhydrous processing and operating conditions. Films of 1 are more moisture resistant than films of 2 and devices containing 1 can be fabricated under ambient humidity levels. The larger bandgap of the 2D structure is also suitable as the higher bandgap absorber in a dual-absorber tandem device. Compared to 2, the layered perovskite structure may offer greater tunability at the molecular level for material optimization.
Databáze:	OpenAIRE
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