A Pyrrole Modified 3,4-Propylenedioxythiophene Conjugated Polymer as Hole Transport Layer for Efficient and Stable Perovskite Solar Cells

Authors

Yuanhao Tang, Purdue University
Ke Ma, Purdue University, Shanghai Jiao Tong University
Wenhao Shao, Purdue University
Yoon Ho Lee, Purdue University
Ashkan Abtahi, Purdue UniversityFollow
Jiaonan Sun, Purdue University
Hanjun Yang, Purdue University
Aidan H. Coffey, Lawrence Berkeley National Laboratory
Harindi R. Atapattu, University of KentuckyFollow
Mustafa Ahmed, Purdue University
Qixuan Hu, Purdue University
Wenzhan Xu, Purdue University
Raunak Dani, Purdue University
Limei Wang, Purdue University
Chenhui Zhu, Lawrence Berkeley National Laboratory
Kenneth R. Graham, University of KentuckyFollow
Jianguo Mei, Purdue UniversityFollow
Letian Dou, Purdue University, Birck Nanotechnology CenterFollow

Abstract

Despite the outstanding electric properties and cost-effectiveness of poly- (3,4-ethylenedioxythiophene) (PEDOT) and its derivatives, their performance as hole transport layer (HTL) materials in conventional perovskite solar cells (PSCs) has lagged behind that of widely used spirobifluorene-based molecules or poly(triaryl amine). This gap is mainly from their poor solubility and energy alignment mismatch. In this work, the design and synthesis of a pyrrole-modified HTL (PPr) based on 3,4-propylenedioxythiophene (ProDOT) are presented for efficient and stable PSCs. As a result of the superior defects passivation ability, excellent contact with perovskite, enhanced hole extraction, and high hydrophobicity, the unencapsulated PPr-based PSCs showed the peak PCE of 21.49% and outstanding moisture stability (over 4000 h). This work highlights the potential application of ProDOT-based materials as HTL for PSCs and underscores the importance of the rational design of PEDOT and its derivatives.

Document Type

Article

Publication Date

2025

Notes/Citation Information

© 2024 The Author(s). Small published by Wiley-VCH GmbH. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

Digital Object Identifier (DOI)

https://doi.org/10.1002/smll.202408440

Funding Information

The authors acknowledge funding support from the U.S. Department of Energy’s Office of Energy Efficiency and Renewable Energy (EERE) under the Solar Energy Technologies Office Award DE-EE0009519.

Repository Citation

Tang, Yuanhao; Ma, Ke; Shao, Wenhao; Lee, Yoon Ho; Abtahi, Ashkan; Sun, Jiaonan; Yang, Hanjun; Coffey, Aidan H.; Atapattu, Harindi R.; Ahmed, Mustafa; Hu, Qixuan; Xu, Wenzhan; Dani, Raunak; Wang, Limei; Zhu, Chenhui; Graham, Kenneth R.; Mei, Jianguo; and Dou, Letian, "A Pyrrole Modified 3,4-Propylenedioxythiophene Conjugated Polymer as Hole Transport Layer for Efficient and Stable Perovskite Solar Cells" (2025). Chemical and Materials Engineering Faculty Publications. 106.
https://uknowledge.uky.edu/cme_facpub/106