Ionic Liquid Control Crystal Growth to Enhance Planar Perovskite Solar Cells Efficiency

Ji-Youn Seo, Taisuke Matsui, Jingshan Luo, Juan-Pablo Correa-Baena, Fabrizio Giordano, Michael Saliba, Kurt Schenk, Amita Ummadisingu, Konrad Domanski, Mahboubeh Hadadian, Anders Hagfeldt, Shaik M. Zakeeruddin, Ullrich Steiner, Michael Grätzel, Antonio Abate

DOI: 10.1002/aenm.201600767.
First published online 29 Jul 2016
Paper on publisher's website
Paper in open access repository

Ionic liquids can retard the perovskite crystallization with the aim to form compact films with larger and more uniformly distributed grain size. The ionic liquid driven crystallization is exploited to prepared a record planar perovskite solar cell with stabilized power output of 19.5%.