Effect of Post-Thermal Annealing on the Performance and Charge Photogeneration Dynamics of PffBT4T-2OD/PC(71)BM Solar Cells

In this work, we studied influence of post thermal annealing on the performance and charge photogeneration processes of PffBT4T-2OD/PC(71)BM solar cells. As-prepared device exhibits a high-power conversion efficiency of 9.5%, much higher than that after thermal annealing. To understand this phenomen...

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Detalles Bibliográficos
Autores principales: Zhang, Wei, Hu, Rong, Zeng, Xiaokang, Su, Xiaojun, Chen, Zhifeng, Zou, Xianshao, Peng, Jun, Zhang, Chengyun, Yartsev, Arkady
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2019
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6473355/
https://www.ncbi.nlm.nih.gov/pubmed/30960392
http://dx.doi.org/10.3390/polym11030408
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author Zhang, Wei
Hu, Rong
Zeng, Xiaokang
Su, Xiaojun
Chen, Zhifeng
Zou, Xianshao
Peng, Jun
Zhang, Chengyun
Yartsev, Arkady
author_facet Zhang, Wei
Hu, Rong
Zeng, Xiaokang
Su, Xiaojun
Chen, Zhifeng
Zou, Xianshao
Peng, Jun
Zhang, Chengyun
Yartsev, Arkady
author_sort Zhang, Wei
collection PubMed
description In this work, we studied influence of post thermal annealing on the performance and charge photogeneration processes of PffBT4T-2OD/PC(71)BM solar cells. As-prepared device exhibits a high-power conversion efficiency of 9.5%, much higher than that after thermal annealing. To understand this phenomenon, we studied charge photogeneration processes in these solar cells by means of time resolved spectroscopy. We associate the degradation of solar cell performance with the reduction of exciton dissociation efficiency and with increased bimolecular recombination of photogenerated charges as a result of annealing. We correlate the generation of localized PffBT4T-2OD polarons observed via spectro-electrochemical measurements with enhancement of the bimolecular charge recombination of annealed solar cells.
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spelling pubmed-64733552019-05-03 Effect of Post-Thermal Annealing on the Performance and Charge Photogeneration Dynamics of PffBT4T-2OD/PC(71)BM Solar Cells Zhang, Wei Hu, Rong Zeng, Xiaokang Su, Xiaojun Chen, Zhifeng Zou, Xianshao Peng, Jun Zhang, Chengyun Yartsev, Arkady Polymers (Basel) Article In this work, we studied influence of post thermal annealing on the performance and charge photogeneration processes of PffBT4T-2OD/PC(71)BM solar cells. As-prepared device exhibits a high-power conversion efficiency of 9.5%, much higher than that after thermal annealing. To understand this phenomenon, we studied charge photogeneration processes in these solar cells by means of time resolved spectroscopy. We associate the degradation of solar cell performance with the reduction of exciton dissociation efficiency and with increased bimolecular recombination of photogenerated charges as a result of annealing. We correlate the generation of localized PffBT4T-2OD polarons observed via spectro-electrochemical measurements with enhancement of the bimolecular charge recombination of annealed solar cells. MDPI 2019-03-02 /pmc/articles/PMC6473355/ /pubmed/30960392 http://dx.doi.org/10.3390/polym11030408 Text en © 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Zhang, Wei
Hu, Rong
Zeng, Xiaokang
Su, Xiaojun
Chen, Zhifeng
Zou, Xianshao
Peng, Jun
Zhang, Chengyun
Yartsev, Arkady
Effect of Post-Thermal Annealing on the Performance and Charge Photogeneration Dynamics of PffBT4T-2OD/PC(71)BM Solar Cells
title Effect of Post-Thermal Annealing on the Performance and Charge Photogeneration Dynamics of PffBT4T-2OD/PC(71)BM Solar Cells
title_full Effect of Post-Thermal Annealing on the Performance and Charge Photogeneration Dynamics of PffBT4T-2OD/PC(71)BM Solar Cells
title_fullStr Effect of Post-Thermal Annealing on the Performance and Charge Photogeneration Dynamics of PffBT4T-2OD/PC(71)BM Solar Cells
title_full_unstemmed Effect of Post-Thermal Annealing on the Performance and Charge Photogeneration Dynamics of PffBT4T-2OD/PC(71)BM Solar Cells
title_short Effect of Post-Thermal Annealing on the Performance and Charge Photogeneration Dynamics of PffBT4T-2OD/PC(71)BM Solar Cells
title_sort effect of post-thermal annealing on the performance and charge photogeneration dynamics of pffbt4t-2od/pc(71)bm solar cells
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6473355/
https://www.ncbi.nlm.nih.gov/pubmed/30960392
http://dx.doi.org/10.3390/polym11030408
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