Illumination Durability and High-Efficiency Sn-Based Perovskite Solar Cell under Coordinated Control of Phenylhydrazine and Halogen Ions

By Chengbo Wang, Yuting Zhang, Feidan Gu, Ziran Zhao, Haisheng Li, Hong Jiang, Z. Bian, Zhiwei Liu. 2020

165 citations recorded by the source corpus.

Summary The organic-inorganic hybrid Sn-based perovskite has attracted extensive attention because of its more suitable band gap and environmentally friendly characteristics, but the natural oxidization of Sn2+ makes for unsatisfactory illumination stability and efficiency in solar cells. Here, we successfully proved that the synergistical introduction of phenylhydrazine cation (PhNHNH3+) and halogen anions (Cl– and Br–) could substantially improve the illumination stability of FASnI3 (FA stands for NH2CH = NH2+) through the combination of experiments and theoretical calculations. The resultant device achieved a power conversion efficiency of 13.4% (certified 12.4%) with striking long-term durability; i.e., the optimized device maintained 82% of the original efficiency over 330 h under AM1.5G one-sun illumination. This method provides a universal way for improving the illumination stability and efficiency of Sn-based perovskites.

Subfields: Electrical and Electronic Engineering, Polymers and Plastics

View Paper: https://www.semanticscholar.org/paper/e1ff2219a51b82da4f9b3ad258bb73d6dfd1d692