Efficient large guanidinium mixed perovskite solar cells with enhanced photovoltage and low energy losses

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Original languageEnglish
Pages (from-to)4315-4318
Journal / PublicationChemical Communications
Issue number30
Online published19 Mar 2019
Publication statusPublished - 18 Apr 2019


We present a strategy for suppressing the open-circuit voltage (Voc) loss of perovskite solar cells by incorporating large guanidinium cations (Gua+) into a perovskite lattice, leading to a significantly improved Voc of 1.19 V and an impressive power conversion efficiency of >21%. Our results manifest the critical role of Gua in passivating defects and highlight the importance of compositional engineering in promoting the performance of perovskites.