Issue 18, 2022

A BODIPY small molecule as hole transporting material for efficient perovskite solar cells

Abstract

BODIPY-based materials are well known for their outstanding chemical and photo-stability as well as their ease of synthesis and tunability of their frontier molecular orbitals. These are attractive features for hole transporting materials (HTMs) for perovskite solar cells (PSCs) that could help improve device stability and cost. In this paper, we report the straightforward synthesis of a new BODIPY small molecule, PTZ-PTZ-BDP, functionalised with phenothiazine moieties in both the meso and α positions giving rise to a Y-shaped structure. As estimated by DFT calculations, and confirmed by electrochemical and ambient photoemission spectroscopy studies, PTZ-PTZ-BDP presents appropriate energy levels suitable for its use as a HTM in PSCs. Electrochemical measurements also reveal several redox processes with excellent reversibility. Systematic evaluation of its performance as HTM in n–i–p PSC with and without dopants was conducted and the device parameters compared with commonly used HTMs of spiro-OMeTAD and PTAA. The CH3NH3PbI3 based PSCs incorporating simple solution processed PTZ-PTZ-BDP as HTM demonstrated a champion power conversion efficiency of 14.6%, matched in performance and shelf-life stability to complex and expensive state-of-the-art HTMs, showing that BODIPY based HTMs are a promising direction for perovskite solar cells.

Graphical abstract: A BODIPY small molecule as hole transporting material for efficient perovskite solar cells

Supplementary files

Article information

Article type
Paper
Submitted
12 May 2022
Accepted
16 Aug 2022
First published
30 Aug 2022
This article is Open Access
Creative Commons BY license

Sustainable Energy Fuels, 2022,6, 4322-4330

A BODIPY small molecule as hole transporting material for efficient perovskite solar cells

J. M. Dos Santos, L. K. Jagadamma, M. Cariello, I. D. W. Samuel and G. Cooke, Sustainable Energy Fuels, 2022, 6, 4322 DOI: 10.1039/D2SE00667G

This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. You can use material from this article in other publications without requesting further permissions from the RSC, provided that the correct acknowledgement is given.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements