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Linear-Shaped Low-Bandgap Asymmetric Conjugated Donor Molecule for Fabrication of Bulk Heterojunction Small-Molecule Organic Solar Cells

A linear–shaped small organic molecule (E)-4-(5-(3,5-dimethoxy-styryl)thiophen-2-yl)-7-(5″-hexyl-[2,2′:5′,2″-terthiophen]-5-yl)benzo[c][1,2,5]thiadiazole (MBTR) comprising a benzothiadiazole (BTD) acceptor linked with the terminal donors bithiophene and dimethoxy vinylbenzene through a π-bridge thio...

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Autores principales: Abdullah, Lee, Sei-Jin, Park, Jong Bae, Kim, Yang Soo, Shin, Hyung-Shik, Kotta, Ashique, Siddiqui, Qamar Tabrez, Lee, Youn-Sik, Seo, Hyung-Kee
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9964613/
https://www.ncbi.nlm.nih.gov/pubmed/36838527
http://dx.doi.org/10.3390/molecules28041538
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author Abdullah,
Lee, Sei-Jin
Park, Jong Bae
Kim, Yang Soo
Shin, Hyung-Shik
Kotta, Ashique
Siddiqui, Qamar Tabrez
Lee, Youn-Sik
Seo, Hyung-Kee
author_facet Abdullah,
Lee, Sei-Jin
Park, Jong Bae
Kim, Yang Soo
Shin, Hyung-Shik
Kotta, Ashique
Siddiqui, Qamar Tabrez
Lee, Youn-Sik
Seo, Hyung-Kee
author_sort Abdullah,
collection PubMed
description A linear–shaped small organic molecule (E)-4-(5-(3,5-dimethoxy-styryl)thiophen-2-yl)-7-(5″-hexyl-[2,2′:5′,2″-terthiophen]-5-yl)benzo[c][1,2,5]thiadiazole (MBTR) comprising a benzothiadiazole (BTD) acceptor linked with the terminal donors bithiophene and dimethoxy vinylbenzene through a π-bridge thiophene was synthesized and analyzed. The MBTR efficiently tuned the thermal, absorption, and emission characteristics to enhance the molecular packing and aggregation behaviors in the solid state. The obtained optical bandgap of 1.86 eV and low-lying highest occupied molecular orbital (HOMO) level of −5.42 eV efficiently lowered the energy losses in the fabricated devices, thereby achieving enhanced photovoltaic performances. The optimized MBTR:PC(71)BM (1:2.5 w/w%) fullerene-based devices showed a maximum power conversion efficiency (PCE) of 7.05%, with an open-circuit voltage (V(OC)) of 0.943 V, short-circuit current density (J(SC)) of 12.63 mA/cm(2), and fill factor (FF) of 59.2%. With the addition of 3% 1,8-diiodooctane (DIO), the PCE improved to 8.76% with a high V(OC) of 1.02 V, J(SC) of 13.78 mA/cm(2), and FF of 62.3%, which are associated with improved charge transport at the donor/acceptor interfaces owing to the fibrous active layer morphology and favorable phase separation. These results demonstrate that the introduction of suitable donor/acceptor groups in molecular design and device engineering is an effective approach to enhancing the photovoltaic performances of organic solar cells.
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spelling pubmed-99646132023-02-26 Linear-Shaped Low-Bandgap Asymmetric Conjugated Donor Molecule for Fabrication of Bulk Heterojunction Small-Molecule Organic Solar Cells Abdullah, Lee, Sei-Jin Park, Jong Bae Kim, Yang Soo Shin, Hyung-Shik Kotta, Ashique Siddiqui, Qamar Tabrez Lee, Youn-Sik Seo, Hyung-Kee Molecules Article A linear–shaped small organic molecule (E)-4-(5-(3,5-dimethoxy-styryl)thiophen-2-yl)-7-(5″-hexyl-[2,2′:5′,2″-terthiophen]-5-yl)benzo[c][1,2,5]thiadiazole (MBTR) comprising a benzothiadiazole (BTD) acceptor linked with the terminal donors bithiophene and dimethoxy vinylbenzene through a π-bridge thiophene was synthesized and analyzed. The MBTR efficiently tuned the thermal, absorption, and emission characteristics to enhance the molecular packing and aggregation behaviors in the solid state. The obtained optical bandgap of 1.86 eV and low-lying highest occupied molecular orbital (HOMO) level of −5.42 eV efficiently lowered the energy losses in the fabricated devices, thereby achieving enhanced photovoltaic performances. The optimized MBTR:PC(71)BM (1:2.5 w/w%) fullerene-based devices showed a maximum power conversion efficiency (PCE) of 7.05%, with an open-circuit voltage (V(OC)) of 0.943 V, short-circuit current density (J(SC)) of 12.63 mA/cm(2), and fill factor (FF) of 59.2%. With the addition of 3% 1,8-diiodooctane (DIO), the PCE improved to 8.76% with a high V(OC) of 1.02 V, J(SC) of 13.78 mA/cm(2), and FF of 62.3%, which are associated with improved charge transport at the donor/acceptor interfaces owing to the fibrous active layer morphology and favorable phase separation. These results demonstrate that the introduction of suitable donor/acceptor groups in molecular design and device engineering is an effective approach to enhancing the photovoltaic performances of organic solar cells. MDPI 2023-02-05 /pmc/articles/PMC9964613/ /pubmed/36838527 http://dx.doi.org/10.3390/molecules28041538 Text en © 2023 by the authors. https://creativecommons.org/licenses/by/4.0/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 (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Abdullah,
Lee, Sei-Jin
Park, Jong Bae
Kim, Yang Soo
Shin, Hyung-Shik
Kotta, Ashique
Siddiqui, Qamar Tabrez
Lee, Youn-Sik
Seo, Hyung-Kee
Linear-Shaped Low-Bandgap Asymmetric Conjugated Donor Molecule for Fabrication of Bulk Heterojunction Small-Molecule Organic Solar Cells
title Linear-Shaped Low-Bandgap Asymmetric Conjugated Donor Molecule for Fabrication of Bulk Heterojunction Small-Molecule Organic Solar Cells
title_full Linear-Shaped Low-Bandgap Asymmetric Conjugated Donor Molecule for Fabrication of Bulk Heterojunction Small-Molecule Organic Solar Cells
title_fullStr Linear-Shaped Low-Bandgap Asymmetric Conjugated Donor Molecule for Fabrication of Bulk Heterojunction Small-Molecule Organic Solar Cells
title_full_unstemmed Linear-Shaped Low-Bandgap Asymmetric Conjugated Donor Molecule for Fabrication of Bulk Heterojunction Small-Molecule Organic Solar Cells
title_short Linear-Shaped Low-Bandgap Asymmetric Conjugated Donor Molecule for Fabrication of Bulk Heterojunction Small-Molecule Organic Solar Cells
title_sort linear-shaped low-bandgap asymmetric conjugated donor molecule for fabrication of bulk heterojunction small-molecule organic solar cells
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9964613/
https://www.ncbi.nlm.nih.gov/pubmed/36838527
http://dx.doi.org/10.3390/molecules28041538
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