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High-Molecular-Weight Electroactive Polymer Additives for Simultaneous Enhancement of Photovoltaic Efficiency and Mechanical Robustness in High-Performance Polymer Solar Cells

[Image: see text] The development of small-molecule acceptors (SMAs) has significantly enhanced the power conversion efficiency (PCE) of polymer solar cells (PSCs); however, the inferior mechanical properties of SMA-based PSCs often limit their long-term stability and application in wearable power g...

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Autores principales: Lee, Jin-Woo, Ma, Boo Soo, Kim, Hyeong Jun, Kim, Taek-Soo, Kim, Bumjoon J.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2021
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8395705/
https://www.ncbi.nlm.nih.gov/pubmed/34467323
http://dx.doi.org/10.1021/jacsau.1c00064
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author Lee, Jin-Woo
Ma, Boo Soo
Kim, Hyeong Jun
Kim, Taek-Soo
Kim, Bumjoon J.
author_facet Lee, Jin-Woo
Ma, Boo Soo
Kim, Hyeong Jun
Kim, Taek-Soo
Kim, Bumjoon J.
author_sort Lee, Jin-Woo
collection PubMed
description [Image: see text] The development of small-molecule acceptors (SMAs) has significantly enhanced the power conversion efficiency (PCE) of polymer solar cells (PSCs); however, the inferior mechanical properties of SMA-based PSCs often limit their long-term stability and application in wearable power generators. Herein, we demonstrate a simple and effective strategy for enhancing the mechanical robustness and PCE of PSCs by incorporating a high-molecular-weight (MW) polymer acceptor (P(A), P(NDI2OD-T2)). The addition of 10–20 wt % P(A) leads to a more than 4-fold increase in the mechanical ductility of the SMA-based PSCs in terms of the crack onset strain (COS). At the same time, the incorporation of P(A) into the active layer improves the charge transport and recombination properties, increasing the PCE of the PSC from 14.6 to 15.4%. The added P(A)s act as tie molecules, providing mechanical and electrical bridges between adjacent domains of SMAs. Thus, for the first time, we produce highly efficient and mechanically robust PSCs with a 15% PCE and 10% COS at the same time, thereby demonstrating their great potential as stretchable or wearable power generators. To understand the origin of the dual enhancements realized by P(A), we investigate the influence of the P(A) content on electrical, structural, and morphological properties of the PSCs.
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spelling pubmed-83957052021-08-30 High-Molecular-Weight Electroactive Polymer Additives for Simultaneous Enhancement of Photovoltaic Efficiency and Mechanical Robustness in High-Performance Polymer Solar Cells Lee, Jin-Woo Ma, Boo Soo Kim, Hyeong Jun Kim, Taek-Soo Kim, Bumjoon J. JACS Au [Image: see text] The development of small-molecule acceptors (SMAs) has significantly enhanced the power conversion efficiency (PCE) of polymer solar cells (PSCs); however, the inferior mechanical properties of SMA-based PSCs often limit their long-term stability and application in wearable power generators. Herein, we demonstrate a simple and effective strategy for enhancing the mechanical robustness and PCE of PSCs by incorporating a high-molecular-weight (MW) polymer acceptor (P(A), P(NDI2OD-T2)). The addition of 10–20 wt % P(A) leads to a more than 4-fold increase in the mechanical ductility of the SMA-based PSCs in terms of the crack onset strain (COS). At the same time, the incorporation of P(A) into the active layer improves the charge transport and recombination properties, increasing the PCE of the PSC from 14.6 to 15.4%. The added P(A)s act as tie molecules, providing mechanical and electrical bridges between adjacent domains of SMAs. Thus, for the first time, we produce highly efficient and mechanically robust PSCs with a 15% PCE and 10% COS at the same time, thereby demonstrating their great potential as stretchable or wearable power generators. To understand the origin of the dual enhancements realized by P(A), we investigate the influence of the P(A) content on electrical, structural, and morphological properties of the PSCs. American Chemical Society 2021-04-15 /pmc/articles/PMC8395705/ /pubmed/34467323 http://dx.doi.org/10.1021/jacsau.1c00064 Text en © 2021 The Authors. Published by American Chemical Society https://creativecommons.org/licenses/by-nc-nd/4.0/Permits non-commercial access and re-use, provided that author attribution and integrity are maintained; but does not permit creation of adaptations or other derivative works (https://creativecommons.org/licenses/by-nc-nd/4.0/).
spellingShingle Lee, Jin-Woo
Ma, Boo Soo
Kim, Hyeong Jun
Kim, Taek-Soo
Kim, Bumjoon J.
High-Molecular-Weight Electroactive Polymer Additives for Simultaneous Enhancement of Photovoltaic Efficiency and Mechanical Robustness in High-Performance Polymer Solar Cells
title High-Molecular-Weight Electroactive Polymer Additives for Simultaneous Enhancement of Photovoltaic Efficiency and Mechanical Robustness in High-Performance Polymer Solar Cells
title_full High-Molecular-Weight Electroactive Polymer Additives for Simultaneous Enhancement of Photovoltaic Efficiency and Mechanical Robustness in High-Performance Polymer Solar Cells
title_fullStr High-Molecular-Weight Electroactive Polymer Additives for Simultaneous Enhancement of Photovoltaic Efficiency and Mechanical Robustness in High-Performance Polymer Solar Cells
title_full_unstemmed High-Molecular-Weight Electroactive Polymer Additives for Simultaneous Enhancement of Photovoltaic Efficiency and Mechanical Robustness in High-Performance Polymer Solar Cells
title_short High-Molecular-Weight Electroactive Polymer Additives for Simultaneous Enhancement of Photovoltaic Efficiency and Mechanical Robustness in High-Performance Polymer Solar Cells
title_sort high-molecular-weight electroactive polymer additives for simultaneous enhancement of photovoltaic efficiency and mechanical robustness in high-performance polymer solar cells
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8395705/
https://www.ncbi.nlm.nih.gov/pubmed/34467323
http://dx.doi.org/10.1021/jacsau.1c00064
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