Issue 9, 2019
From the journal:

Journal of Materials Chemistry A

Flexible quintuple cation perovskite solar cells with high efficiency†

Bingbing Cao,a   Longkai Yang,a   Shusen Jiang,a   Hong Lin, ORCID logo *b   Ning Wang*c  and  Xin Li ORCID logo *a  

* Corresponding authors

a Pen-Tung Sah Institute of Micro-Nano Science and Technology, Xiamen University, Xiamen 361005, China
E-mail: lixin01@xmu.edu.cn

b State Key Laboratory of New Ceramics & Fine Processing, School of Material Science and Engineering, Tsinghua University, Beijing 100084, China
E-mail: hong-lin@tsinghua.edu.cn

c State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, Haikou 570228, China
E-mail: wangninguestc@gmail.com

Abstract

Flexible perovskite solar cells (PSCs) present the most promising photovoltaic technologies due to their flexibility, light weight, and low temperature processing. However, their power conversion efficiency (PCE) is still far behind those of rigid PSCs. The enhancement of the PCE of flexible devices remains challenging. Here, two strategies are developed to improve the PCE of flexible PSCs. One strategy is to use quintile monovalent cations to obtain high-quality perovskite films. Rubidium (Rb) and potassium (K) cations are added to a basic perovskite film containing cesium, methylammonium, and formamidinium cations to improve film quality for efficient PSCs. It is revealed that the coexistence of Rb+ and K+ cations can effectively reduce the recombination within PSCs and thus improve the photovoltaic performance. The second strategy is to insert an ultrathin HfO2 layer between indium tin oxide (ITO) and the tin oxide layer by atomic layer deposition at low temperature. The recombination between ITO and perovskite films is found to be effectively suppressed after the introduction of an optimized HfO2 layer. As a result, a record PCE for the PSC devices based on polyethylene naphthalate (PEN)/ITO substrates is obtained as high as 19.11%, which is the highest reported PCE for flexible PSCs to date.

Graphical abstract: Flexible quintuple cation perovskite solar cells with high efficiency

About
Cited by
Related
Download options Please wait...

Supplementary files

Article information

DOI
https://doi.org/10.1039/C8TA11945G
Article type
Paper
Submitted
11 Dec 2018
Accepted
30 Jan 2019
First published
30 Jan 2019

J. Mater. Chem. A, 2019,7, 4960-4970

Permissions

Request permissions

Flexible quintuple cation perovskite solar cells with high efficiency

B. Cao, L. Yang, S. Jiang, H. Lin, N. Wang and X. Li, J. Mater. Chem. A, 2019, 7, 4960 DOI: 10.1039/C8TA11945G

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements