Stabilizing Perovskite Solar Cells to IEC61215:2016 Standards with over 9,000-h Operational Tracking

By Anyi Mei, Yusong Sheng, Yue Ming, Yue Hu, Yaoguang Rong, Weihua Zhang, Shulin Luo, Guangren Na, Chengbo Tian, Xiaomeng Hou and 9 more. 2020

285 citations recorded by the source corpus.

Summary The stability of perovskite solar cells (PSCs) has been considered as the largest obstacle to their commercialization. Herein, we observed that the main failure mechanism for MAPbI3 perovskite is the escape of methylammonium (MA) iodide at the grain boundaries in an open space or the reconstruction of crystal in a confined small space, as well as the irreversible long-distance ionic migration under the multiple actions of light, heat, and electrical bias. Strengthened with bifunctional organic molecular of 5-ammoniumvaleric acid (5-AVA) iodide at the grain boundaries, the MAPbI3 crystal was localized in the nanoscale, and thus, the decomposition or reconstruction was inhibited and the ionic migration became reversible. As a result, we propose a reliable approach to make PSCs meet stability standards of IEC61215:2016 qualification tests. A printable PSC filled with (5-AVA)XMA1-XPbI3 has been working for more than 9,000 h at a maximum power point of 55°C ± 5°C without obvious decay.

Subfields: Electrical and Electronic Engineering, Polymers and Plastics

View Paper: https://www.semanticscholar.org/paper/67e06b2369a2d745be0e3876f7030a530dac2e1a