Linear-Shaped Low-Bandgap Asymmetric Conjugated Donor Molecule for Fabrication of Bulk Heterojunction Small-Molecule Organic Solar Cells
العنوان: | Linear-Shaped Low-Bandgap Asymmetric Conjugated Donor Molecule for Fabrication of Bulk Heterojunction Small-Molecule Organic Solar Cells |
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المؤلفون: | null Abdullah, Sei-Jin Lee, Jong Bae Park, Yang Soo Kim, Hyung-Shik Shin, Ashique Kotta, Qamar Tabrez Siddiqui, Youn-Sik Lee, Hyung-Kee Seo |
المصدر: | Molecules Volume 28 Issue 4 Pages: 1538 |
بيانات النشر: | Multidisciplinary Digital Publishing Institute, 2023. |
سنة النشر: | 2023 |
مصطلحات موضوعية: | electron donor, Chemistry (miscellaneous), Organic Chemistry, Drug Discovery, Molecular Medicine, Pharmaceutical Science, low bandgap, organic solar cell, Physical and Theoretical Chemistry, hexyl bithiophene, thermal stability, Analytical Chemistry |
الوصف: | 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:PC71BM (1:2.5 w/w%) fullerene-based devices showed a maximum power conversion efficiency (PCE) of 7.05%, with an open-circuit voltage (VOC) of 0.943 V, short-circuit current density (JSC) of 12.63 mA/cm2, 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 VOC of 1.02 V, JSC of 13.78 mA/cm2, 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. |
وصف الملف: | application/pdf |
اللغة: | English |
تدمد: | 1420-3049 |
DOI: | 10.3390/molecules28041538 |
URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a3bf01d6eb3d33fe4ef3bdfed5caf032 |
حقوق: | OPEN |
رقم الأكسشن: | edsair.doi.dedup.....a3bf01d6eb3d33fe4ef3bdfed5caf032 |
قاعدة البيانات: | OpenAIRE |
تدمد: | 14203049 |
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DOI: | 10.3390/molecules28041538 |