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

作者：Ian C. P. Smith, Eric T. Hoke, Diego Solís-Ibarra, Michael David McGehee, Hemamala I. Karunadasa · 发表于：Angewandte Chemie · 年份：2014 · DOI：10.1002/ange.201406466 · 被引用次数：693 · 研究领域：Perovskite Materials and Applications、Conducting polymers and applications、Quantum Dots Synthesis And Properties

Abstract 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.