Issue 30, 2019
From the journal:

Chemical Communications

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

Shengfan Wu,a   Zhen Li,a   Jie Zhang,a   Tiantian Liu,a   Zonglong Zhu ORCID logo *a  and  Alex K.-Y. Jen*ab  

* Corresponding authors

a Department of Chemistry, City University of Hong Kong, Kowloon, Hong Kong
E-mail: zonglzhu@cityu.edu.hk, alexjen@cityu.edu.hk

b Department of Materials Science and Engineering, City University of Hong Kong, Kowloon, Hong Kong

Abstract

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.

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

  • This article is part of the themed collection: Perovskites
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Article information

DOI
https://doi.org/10.1039/C9CC00016J
Article type
Communication
Submitted
02 Jan 2019
Accepted
18 Mar 2019
First published
19 Mar 2019

Chem. Commun., 2019,55, 4315-4318

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

S. Wu, Z. Li, J. Zhang, T. Liu, Z. Zhu and A. K.-Y. Jen, Chem. Commun., 2019, 55, 4315 DOI: 10.1039/C9CC00016J

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