Self‐Repairing Tin‐Based Perovskite Solar Cells with a Breakthrough Efficiency Over 11%
Citations Over TimeTop 1% of 2020 papers
Abstract
The development of tin (Sn)-based perovskite solar cells (PSCs) is hindered by their lower power conversion efficiency and poorer stability compared to the lead-based ones, which arise from the easy oxidation of Sn2+ to Sn4+ . Herein, phenylhydrazine hydrochloride (PHCl) is introduced into FASnI3 (FA = NH2 CH NH2 + ) perovskite films to reduce the existing Sn4+ and prevent the further degradation of FASnI3 , since PHCl has a reductive hydrazino group and a hydrophobic phenyl group. Consequently, the device achieves a record power conversion efficiency of 11.4% for lead-free PSCs. Besides, the unencapsulated device displays almost no efficiency reduction in a glove box over 110 days and shows efficiency recovery after being exposed to air, due to a proposed self-repairing trap state passivation process.
Related Papers
- → Doubling the power conversion efficiency in CdS/CdSe quantum dot sensitized solar cells with a ZnSe passivation layer(2016)125 cited
- → Direct formation of I3- ions in organic cation solution for efficient perovskite solar cells(2018)35 cited
- → A Highly Stable All‐Inorganic CsPbBr3 Perovskite Solar Cell(2019)39 cited
- → Sulfur passivation of 3C-SiC thin film(2018)4 cited
- → Dead-bolt type design for efficient and stable perovskite solar cells(2020)