Understanding the Interplay of Transport-Morphology-Performance in PBDB-T Based Polymer Solar Cells
Abstract
Polymer–polymer blends have been reported to exhibit exceptional thermal and ambient stability. However, power conversion efficiencies (PCEs) from devices using polymeric acceptors have been recorded to be significantly lower than those based on conjugated molecular acceptors. Herein, two organic nonfullerene bulk heterojunction (BHJ) blends ITIC:PBDB-T and N2200:PBDB-T, together with their fullerene counterpart, PCBM:PBDB-T, are adopted to understand the effect of electron acceptors on device performance. Free charge carrier properties using time-resolved microwave conductivity (TRMC) measurements are comprehensively investigated. The nonfullerene devices show an improved PCE of 10.06% and 6.65% in the ITIC- and N2200-based cells, respectively. In comparison, the PCBM:PBDB-T-based devices yield a PCE of 5.88%. The optimal N2200:PBDB-T produced the highest TRMC mobility, longest lifetime, and greatest free-carrier diffusion length. It is found that such phenomena can be associated with the unfavorable morphology of the all-polymer BHJ microstructure. In contrast, the solar cells using either the PCBM or ITIC acceptors display a more balanced donor and acceptor phase separation, leading to more efficient free-carrier separation and transport in the operating device. By sacrificing efficiency for superior stability, it is shown that the improved structure in all-polymer blend can deliver a more stable morphology under thermal stress.
- Authors:
-
[1];
- Soochow Univ., Suzhou (China)
- National Renewable Energy Lab. (NREL), Golden, CO (United States)
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Univ. of Yangon (Myanmar)
- King Mongkut's Univ. of Technology Thonburi, Bangkok (Thailand)
- Publication Date:
- Research Org.:
- National Renewable Energy Lab. (NREL), Golden, CO (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Sponsoring Org.:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE), Renewable Power Office. Solar Energy Technologies Office; USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1593692
- Alternate Identifier(s):
- OSTI ID: 1775376
- Report Number(s):
- NREL/JA-5900-75202
Journal ID: ISSN 2367-198X; MainId:16692;UUID:637bfb9b-99ef-e911-9c29-ac162d87dfe5;MainAdminID:5170
- Grant/Contract Number:
- AC36-08GO28308; AC02-05CH11231
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Solar RRL
- Additional Journal Information:
- Journal Volume: 4; Journal Issue: 4; Journal ID: ISSN 2367-198X
- Publisher:
- Wiley
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 14 SOLAR ENERGY; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; free carrier mobility; nonfullerene acceptor; polymer solar cells; stability; time-resolved microwave conductivity; TRMC
Citation Formats
Zhang, Qilin, Yuan, Xin, Feng, Yifeng, Larson, Bryon W., Su, Gregory M., Maung, Yin Maung, Rujisamphan, Nopporn, Li, Youyong, Yuan, Jianyu, and Ma, Wanli. Understanding the Interplay of Transport-Morphology-Performance in PBDB-T Based Polymer Solar Cells. United States: N. p., 2020.
Web. doi:10.1002/solr.201900524.
Zhang, Qilin, Yuan, Xin, Feng, Yifeng, Larson, Bryon W., Su, Gregory M., Maung, Yin Maung, Rujisamphan, Nopporn, Li, Youyong, Yuan, Jianyu, & Ma, Wanli. Understanding the Interplay of Transport-Morphology-Performance in PBDB-T Based Polymer Solar Cells. United States. https://doi.org/10.1002/solr.201900524
Zhang, Qilin, Yuan, Xin, Feng, Yifeng, Larson, Bryon W., Su, Gregory M., Maung, Yin Maung, Rujisamphan, Nopporn, Li, Youyong, Yuan, Jianyu, and Ma, Wanli. Thu .
"Understanding the Interplay of Transport-Morphology-Performance in PBDB-T Based Polymer Solar Cells". United States. https://doi.org/10.1002/solr.201900524. https://www.osti.gov/servlets/purl/1593692.
@article{osti_1593692,
title = {Understanding the Interplay of Transport-Morphology-Performance in PBDB-T Based Polymer Solar Cells},
author = {Zhang, Qilin and Yuan, Xin and Feng, Yifeng and Larson, Bryon W. and Su, Gregory M. and Maung, Yin Maung and Rujisamphan, Nopporn and Li, Youyong and Yuan, Jianyu and Ma, Wanli},
abstractNote = {Polymer–polymer blends have been reported to exhibit exceptional thermal and ambient stability. However, power conversion efficiencies (PCEs) from devices using polymeric acceptors have been recorded to be significantly lower than those based on conjugated molecular acceptors. Herein, two organic nonfullerene bulk heterojunction (BHJ) blends ITIC:PBDB-T and N2200:PBDB-T, together with their fullerene counterpart, PCBM:PBDB-T, are adopted to understand the effect of electron acceptors on device performance. Free charge carrier properties using time-resolved microwave conductivity (TRMC) measurements are comprehensively investigated. The nonfullerene devices show an improved PCE of 10.06% and 6.65% in the ITIC- and N2200-based cells, respectively. In comparison, the PCBM:PBDB-T-based devices yield a PCE of 5.88%. The optimal N2200:PBDB-T produced the highest TRMC mobility, longest lifetime, and greatest free-carrier diffusion length. It is found that such phenomena can be associated with the unfavorable morphology of the all-polymer BHJ microstructure. In contrast, the solar cells using either the PCBM or ITIC acceptors display a more balanced donor and acceptor phase separation, leading to more efficient free-carrier separation and transport in the operating device. By sacrificing efficiency for superior stability, it is shown that the improved structure in all-polymer blend can deliver a more stable morphology under thermal stress.},
doi = {10.1002/solr.201900524},
journal = {Solar RRL},
number = 4,
volume = 4,
place = {United States},
year = {2020},
month = {1}
}
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