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New low bandgap near-IR conjugated D-A copolymers for BHJ polymers solar cell applicationsстатья
Статья опубликована в высокорейтинговом журнале
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 26 сентября 2016 г.
- Авторы: Keshtov M.L., Kuklin S.A., Radychev N.A., Nikolaev A.Y., Ostapov I.E., Krayushkin M.M., Konstantinov I.O., Koukaras E.N., Abhishek Sharma, Sharma G.D.
- Журнал: Physical Chemistry Chemical Physics
- Том: 18
- Год издания: 2016
- Издательство: Royal Society of Chemistry
- Местоположение издательства: United Kingdom
- Первая страница: 8389
- Последняя страница: 8400
- DOI: 10.1039/C5CP07705B
- Аннотация: We synthesized two novel ultra low bandgap donor-acceptor (D-A) copolymers (Eg≤ 1.2 eV), containing the thiadiazoloquinoxaline unit as the main electron accepting unit (A) and benzodithiophene (BDT) and dithienosilole (DTS) as different donor units (D), denoted as P1 and P2, respectively, by cross-coupling Stille reaction. The copolymers possess a light absorption range from UV (350 nm) to near-IR (1300 nm) with optical bandgaps 1.16 eV and 1.08 eV, respectively. Comparison between quantum-chemical calculations with experimental data were performed for proposing more detailed conception of the optical and electronic properties of these copolymers and used a donor for polymer solar cells (PSCs). The PSCs based on optimized P1:PC71BM and P2:PC71BM showed overall power conversion efficiency (PCE) of 4.32 % and 3.48 %, respectively. Although the P2 possess broad absorption coverage up to 1300 nm, the lower PCE may be attributed to the low Jsc, due to the poor driving force for exciton dissociation, since the LUMO offset with PC71BM is less than 0.3 eV. The PCE has been significantly increased to 7.27 % and 6.68 % for solvent vapor annealing (SVA) treated P1:PC71BM and P2:PC71BM active layers, respectively. This improvement arises from the appropriate nanoscale morphology and increase in hole mobility, induced by SVA treatment of the active layer. Key words: NIR copolymers, Bulk heterojunction solar cells, solvent vapor annealing, power conversion efficiency
- Добавил в систему: Куклин Сергей Александрович
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