Xiaohui Wang
In Situ Photogenerated Radicals of Hydroxyl Substituted Pyrene-Based Triphenylamines with Enhanced Transport and Free Doping/Post-Oxidation for Efficient Perovskite Solar Cells
Wang, Xiaohui; Xie, Zhixin; Wang, Rongxin; Xiao, Ye; Yan, Kai; Zhao, Yu; Lin, Rui; Redshaw, Carl; Min, Yonggang; Ouyang, Xinhua; Feng, Xing
Authors
Zhixin Xie
Rongxin Wang
Ye Xiao
Kai Yan
Yu Zhao
Rui Lin
Emeritus Professor Carl Redshaw C.Redshaw@hull.ac.uk
Emeritus Professor
Yonggang Min
Xinhua Ouyang
Xing Feng
Abstract
The high-performance hole transporting material (HTM) is one of the most important components for the perovskite solar cells (PSCs) in promoting power conversion efficiency (PCE). However, the low conductivity of HTMs and their additional requirements for doping and post-oxidation greatly limits the device performance. In this work, three novel pyrene-based derivatives containing methoxy-substituted triphenylamines units (PyTPA, PyTPA-OH and PyTPA-2OH) are designed and synthesized, where different numbers of hydroxyl groups are connected at the 2- or 2,7-positions of the pyrene core. These hydroxyl groups at the 2- or 2,7-positions of pyrene play a significantly role to enhance the intermolecular interactions that are able to generate in situ radicals with the assistance of visible light irradiation, resulting in enhanced hole transferring ability, as well as an enhanced conductivity and suppressed recombination. These pyrene-core based HTMs exhibit excellent performance in PSCs, which possess a higher PCE than those control devices using the traditional spiro-OMeTAD as the HTM. The best performance can be found in the devices with PyTPA-2OH. It has an average PCE of 23.44% (PCEmax = 23.50%), which is the highest PCE among the reported PSCs with the pyrene-core based HTMs up to date. This research offers a novel avenue to design a dopant-free HTM by the combination of the pyrene core, methoxy triphenylamines, and hydroxy groups.
Citation
Wang, X., Xie, Z., Wang, R., Xiao, Y., Yan, K., Zhao, Y., Lin, R., Redshaw, C., Min, Y., Ouyang, X., & Feng, X. (in press). In Situ Photogenerated Radicals of Hydroxyl Substituted Pyrene-Based Triphenylamines with Enhanced Transport and Free Doping/Post-Oxidation for Efficient Perovskite Solar Cells. Small, https://doi.org/10.1002/smll.202311914
| Journal Article Type | Article |
|---|---|
| Acceptance Date | Mar 29, 2024 |
| Online Publication Date | Apr 2, 2024 |
| Deposit Date | Apr 13, 2024 |
| Publicly Available Date | Apr 3, 2025 |
| Journal | Small |
| Print ISSN | 1613-6810 |
| Publisher | Wiley |
| Peer Reviewed | Peer Reviewed |
| DOI | https://doi.org/10.1002/smll.202311914 |
| Keywords | Hole transporting material; Perovskite solar cells; Power conversion efficiency; Pyrene; Radical |
| Public URL | https://hull-repository.worktribe.com/output/4624465 |
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Copyright Statement
This is the peer reviewed version of the following article: X. Wang, Z. Xie, R. Wang, Y. Xiao, K. Yan, Y. Zhao, R. Lin, C. Redshaw, Y. Min, X. Ouyang, X. Feng, In Situ Photogenerated Radicals of Hydroxyl Substituted Pyrene-Based Triphenylamines with Enhanced Transport and Free Doping/Post-Oxidation for Efficient Perovskite Solar Cells. Small 2024, 2311914., which has been published in final form at https://doi.org/10.1002/smll.202311914. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. This article may not be enhanced, enriched or otherwise transformed into a derivative work, without express permission from Wiley or by statutory rights under applicable legislation. Copyright notices must not be removed, obscured or modified. The article must be linked to Wiley’s version of record on Wiley Online Library and any embedding, framing or otherwise making available the article or pages thereof by third parties from platforms, services and websites other than Wiley Online Library must be prohibited.