Issue 11, 2024

Hole-transporting alternating copolymers for perovskite solar cells: thia[5]helicene comonomer outperforms planar perylothiophene analog

Abstract

Semiconducting polymers with high glass transition temperatures play a pivotal role in advancing thermally tolerant organic optoelectronic devices. This investigation underscores the remarkable potential of helicene as a comonomer in the construction of semiconducting polymers. Non-planar thia[5]helicene or planar perylo[1,12-bcd]thiophene is co-polymerized in an alternating fashion with 3,4-ethylenedioxythiophene, phenoxazine, and 3,4-ethylenedioxythiophene, resulting in two quaternary alternating copolymers. The thiahelicene-based alternating copolymer, characterized by a deeper HOMO energy level, exhibits decelerated hole extraction kinetics and diminished hole density compared to its perylothiophene-based counterpart. Notably, due to enhanced solubility, the thiahelicene-based copolymer demonstrates increased molecular weight, which contributes to higher glass transition temperature and hole mobility. When utilized as a hole transport material in n–i–p type perovskite solar cells, the thiahelicene-based copolymer demonstrates an elevated average power conversion efficiency (25.2%), enhanced thermal storage stability, and improved operational endurance.

Graphical abstract: Hole-transporting alternating copolymers for perovskite solar cells: thia[5]helicene comonomer outperforms planar perylothiophene analog

Supplementary files

Article information

Article type
Paper
Submitted
01 Feb 2024
Accepted
13 May 2024
First published
14 May 2024

Energy Environ. Sci., 2024,17, 3937-3946

Hole-transporting alternating copolymers for perovskite solar cells: thia[5]helicene comonomer outperforms planar perylothiophene analog

L. He, Y. Zhang, B. Zhang, T. Li, Y. Cai, M. Ren, J. Zhang, P. Wang and Y. Yuan, Energy Environ. Sci., 2024, 17, 3937 DOI: 10.1039/D4EE00513A

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