أعرض في EDS

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

التفاصيل البيبلوغرافية
العنوان: Linear-Shaped Low-Bandgap Asymmetric Conjugated Donor Molecule for Fabrication of Bulk Heterojunction Small-Molecule Organic Solar Cells
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
الوصف
تدمد:14203049
DOI:10.3390/molecules28041538