Issue 8, 2023

Spirobifluorene with an asymmetric fluorenylcarbazolamine electron-donor as the hole transport material increases thermostability and efficiency of perovskite solar cells

Abstract

The efficiency of perovskite solar cells utilizing spiro-OMeTAD as the hole transport material has been persistently enhanced, attaining the current 25.7%. However, these high-efficiency cells are unable to withstand the harsh heat at 85 °C. In this report, we present a spirobifluorene based hole transport material with highly asymmetric fluorenylcarbazolamine as the electron-donor, denoted as SBF-FC. Compared to spiro-OMeTAD, SBF-FC exhibits a comparable HOMO energy level, but the glass transition temperature is almost twice as high. The composite produced by blending SBF-FC and 4-tert-butylpyridinium bis(trifluoromethanesulfonyl)imide at an 85 : 15 weight ratio demonstrates a room temperature conductivity of 49 μS cm−1 while retaining a high glass transition temperature of 176 °C. Importantly, the SBF-FC based hole transport layer, deposited onto the surface of a FAPbI3 thin film, exhibits a more uniform morphology and remarkedly improved 85 °C durability, effectively suppressing the corrosion and decomposition of the perovskite film. By utilizing the SBF-FC based hole transport layer, we demonstrate perovskite solar cells achieving an average initial efficiency of 24.5% and long-term thermostability at 85 °C.

Graphical abstract: Spirobifluorene with an asymmetric fluorenylcarbazolamine electron-donor as the hole transport material increases thermostability and efficiency of perovskite solar cells

Supplementary files

Article information

Article type
Paper
Submitted
22 apr. 2023
Accepted
29 jún. 2023
First published
29 jún. 2023

Energy Environ. Sci., 2023,16, 3534-3542

Spirobifluorene with an asymmetric fluorenylcarbazolamine electron-donor as the hole transport material increases thermostability and efficiency of perovskite solar cells

Y. Ren, Y. Wei, T. Li, Y. Mu, M. Zhang, Y. Yuan, J. Zhang and P. Wang, Energy Environ. Sci., 2023, 16, 3534 DOI: 10.1039/D3EE01284K

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