Extending the Lifetime of Perovskite Solar Cells using a Perfluorinated Dopant

• Published in: ChemSusChem, vol. 9, num. 18, p. 2708-2714
• Weinheim: Wiley-V C H Verlag Gmbh, 2016

The principle limitation of perovskite solar cells is related to their instability and, hence, their limited lifetime. Herein, we employ an imidazolium iodide dopant, 1-methyl-3-(1H,1H,2H,2H-nonafluorohexyl)-imidazolium iodide, containing a perfluorous appendage, which leads to prolonged (unencapsulated, under Ar atmosphere) device activities exceeding 100 days without compromising the power conversion efficiency and other photovoltaic parameters. The extended lifetime of the device can be attributed, at least in part, to the hydrophobic nature of the imidazolium iodide salt. The functionalization of the perovskite material was found to have negligible influence on the perovskite crystal structure.

Keywords: doping ; fluorination ; perovskite ; solar cells ; stability

Reference

• EPFL-ARTICLE-221251
• doi:10.1002/cssc.201601030
• View record in Web of Science

Record created on 2016-09-10, modified on 2017-05-29