Methylammonium Lead Bromide Perovskite-Based Solar Cells by Vapor-Assisted Deposition

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• 作者：Rui Sheng ; Anita Ho-Baillie ; Shujuan Huang ; Sheng Chen ; Xiaoming Wen ; Xiaojing Hao ; Martin A. Green
• 刊名：Journal of Physical Chemistry C
• 出版年：2015
• 出版时间：February 19, 2015
• 年：2015
• 卷：119
• 期：7
• 页码：3545-3549
• 全文大小：304K
• ISSN：1932-7455

文摘

The past two years have seen the uniquely rapid emergence of a new class of solar cell based on organic鈥搃norganic halide perovskite. Although less explored than its tri-iodide counterparts, CH₃NH₃PbBr₃ has a larger bandgap of 2.3 eV with a higher voltage potential that is suitable for tandem solar cell applications. In this paper, we report a vapor-assisted method for depositing and fully crystallizing CH₃NH₃PbBr₃ film on mesoporous TiO₂ with good coverage. CH₃NH₃PbBr₃ fabricated using this method has demonstrated long carrier diffusion length (>1 渭m) as estimated by transient photoluminescence-quenching measurements. We demonstrate solar cells fabricated using such films and spiro-OMeTAD as the hole transport layer with an averaged (from forward and reverse scans) conversion efficiency of 8.7%, V_oc of 1.45 V, J_sc of 9.75 mA/cm², and fill factor of 61.5%.