Issue 12, 2018

Organic hole-transporting materials for 9.32%-efficiency and stable CsPbBr3 perovskite solar cells

Abstract

Cost-effective and stable CsPbBr3-based inorganic perovskite solar cells (PSCs) are regarded as promising candidates for next-generation photovoltaics. However, the large interfacial energy differences at the CsPbBr3/hole-transporting layer lead to serious charge recombination and poor charge extraction kinetics. Herein, we prepare a series of hole-transporting materials (HTMs) to improve hole extraction and to reduce electron–hole recombination at the CsPbBr3/HTM interface. In comparison with the power conversion efficiency (PCE) of 6.10% for an HTM-free device, the CsPbBr3 PSCs with polymeric HTMs such as polythiophene, polypyrrole and polyaniline yield efficiencies of 8.36%, 8.32% and 7.69%, respectively. Similarly, the inorganic PSC with organic small molecule BT-BTH achieves a PCE as high as 9.32% due to the improved hole conductivity. Moreover, the unencapsulated PSC with BT-BTH maintains 94% of its initial efficiency in 70% relative humidity over 80 days.

Graphical abstract: Organic hole-transporting materials for 9.32%-efficiency and stable CsPbBr3 perovskite solar cells

Supplementary files

Article information

Article type
Research Article
Submitted
09 Jul 2018
Accepted
07 Okt 2018
First published
08 Okt 2018

Mater. Chem. Front., 2018,2, 2239-2244

Organic hole-transporting materials for 9.32%-efficiency and stable CsPbBr3 perovskite solar cells

Y. Zhao, T. Liu, F. Ren, J. Duan, Y. Wang, X. Yang, Q. Li and Q. Tang, Mater. Chem. Front., 2018, 2, 2239 DOI: 10.1039/C8QM00337H

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