Lowly Fused Non-Fullerene Acceptors Towards Efficient Organic Solar Cells Enabled by Isomerization
Abstract
Here two lowly fused non-fullerene acceptors (NFAs) with isomeric structures, named as BTP-out-4F and BTP-in-4F, were developed by tailoring the fused 7-ring central core of Y6 into a lowly fused 5-ring linked with two octyloxythiophene bridges. BTP-out-4F with octyloxy side chains away from the central core exhibited large steric hindrance that restrained the rotational freedom between the thiophene bridge and end group but maintained free rotation between the central core and the thiophene bridge. In contrast, BTP-in-4F with octyloxy side chains close to the central core had much lower rotation freedom due to the non-covalent S…O interactions locked the central core, thiophene bridge and end group simultaneously, making BTP-in-4F have higher molecular crystallinity. On the other hand, the optical properties, energy levels and the blend morphology properties were significantly influenced, leading to distinctive photovoltaic performances. BTP-out-4F formed favorable energy level alignment and morphology when matching with PBDB-T donor, thus its device realized a much higher PCE of 13.32%, which was over 13 times than that of BTP-in-4F based device (PCE=0.97%).
- Authors:
-
- Sichuan Univ., Chengdu (China)
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- Publication Date:
- Research Org.:
- Brookhaven National Laboratory (BNL), Upton, NY (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES); National Natural Science Foundation of China (NSFC); Foundation of State Key Laboratory of Polymer Materials Engineering; Fundamental Research Funds for the Central Universities
- OSTI Identifier:
- 1890202
- Report Number(s):
- BNL-223510-2022-JAAM
Journal ID: ISSN 0256-7679
- Grant/Contract Number:
- SC0012704; 21825502; 22075190; 21905185; 22105135; 2020ZYD004; SKLPME 2017-2-04
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Chinese Journal of Polymer Science
- Additional Journal Information:
- Journal Volume: 40; Journal Issue: 8; Journal ID: ISSN 0256-7679
- Publisher:
- Springer Nature
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; polymer solar cells; nonfullerene acceptors; lowly fused; structural isomerization; confirmation lock
Citation Formats
Deng, Min, Xu, Xiao-Peng, Yu, Li-Yang, Li, Rui-Peng, and Peng, Qiang. Lowly Fused Non-Fullerene Acceptors Towards Efficient Organic Solar Cells Enabled by Isomerization. United States: N. p., 2022.
Web. doi:10.1007/s10118-022-2751-z.
Deng, Min, Xu, Xiao-Peng, Yu, Li-Yang, Li, Rui-Peng, & Peng, Qiang. Lowly Fused Non-Fullerene Acceptors Towards Efficient Organic Solar Cells Enabled by Isomerization. United States. https://doi.org/10.1007/s10118-022-2751-z
Deng, Min, Xu, Xiao-Peng, Yu, Li-Yang, Li, Rui-Peng, and Peng, Qiang. Wed .
"Lowly Fused Non-Fullerene Acceptors Towards Efficient Organic Solar Cells Enabled by Isomerization". United States. https://doi.org/10.1007/s10118-022-2751-z. https://www.osti.gov/servlets/purl/1890202.
@article{osti_1890202,
title = {Lowly Fused Non-Fullerene Acceptors Towards Efficient Organic Solar Cells Enabled by Isomerization},
author = {Deng, Min and Xu, Xiao-Peng and Yu, Li-Yang and Li, Rui-Peng and Peng, Qiang},
abstractNote = {Here two lowly fused non-fullerene acceptors (NFAs) with isomeric structures, named as BTP-out-4F and BTP-in-4F, were developed by tailoring the fused 7-ring central core of Y6 into a lowly fused 5-ring linked with two octyloxythiophene bridges. BTP-out-4F with octyloxy side chains away from the central core exhibited large steric hindrance that restrained the rotational freedom between the thiophene bridge and end group but maintained free rotation between the central core and the thiophene bridge. In contrast, BTP-in-4F with octyloxy side chains close to the central core had much lower rotation freedom due to the non-covalent S…O interactions locked the central core, thiophene bridge and end group simultaneously, making BTP-in-4F have higher molecular crystallinity. On the other hand, the optical properties, energy levels and the blend morphology properties were significantly influenced, leading to distinctive photovoltaic performances. BTP-out-4F formed favorable energy level alignment and morphology when matching with PBDB-T donor, thus its device realized a much higher PCE of 13.32%, which was over 13 times than that of BTP-in-4F based device (PCE=0.97%).},
doi = {10.1007/s10118-022-2751-z},
journal = {Chinese Journal of Polymer Science},
number = 8,
volume = 40,
place = {United States},
year = {Wed Jun 22 00:00:00 EDT 2022},
month = {Wed Jun 22 00:00:00 EDT 2022}
}
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