Synthesis of new D-A1-D-A2 type low bandgap terpolymers based on different thiadiazoloquinoxaline acceptor units for efficient polymer solar cells

Keshtov, M.L.; Kuklin, S.A.; Radychev, N.A.; Ostapov, I.E.; Nikolaev, A.Y.; Konstantinov, I.O.; Krayushkin, M.M.; Koukaras, E.N.; Abhishek, S.; Sharma, G.D.

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., Ostapov I.E., Nikolaev A.Y., Konstantinov I.O., Krayushkin M.M., Koukaras E.N., Abhishek Sharma, Sharma G.D.
Журнал: RSC advances
Том: 6
Год издания: 2016
Издательство: Royal Society of Chemistry
Местоположение издательства: United Kingdom
Первая страница: 71232
Последняя страница: 71244
DOI: 10.1039/C6RA14537J
Аннотация: Two low bandgap D-A1- D–A2 conjugated copolymers, namely denoted as P1 (nonfluorine substituted thiadiazoloquinoxaline A2) and P2 (fluorine substituted thiadiazoloquinoxaline A2) with same D (thiophene) and A1 (benzothiadiazole) groups were synthesized in order to investigate the effect of fluorine atoms on the photovoltaic performance of polymer solar cells. The electrochemical properties demonstrate that the highest occupied molecular orbital (HOMO) energy level lowered from –5.08 eV (for P1) to –5.16 eV (for P2), whereas lowest unoccupied molecular orbital (LUMO) energy levels remain nearly the same. These copolymers showed strong absorption in the wavelength range 300-1100 nm and have a bandgap of around 1.08 and 1.11 eV for P1 and P2, respectively. After the optimization of weight ratio and concentration of solvent additives 1- chloronaphathalene (CN), the highest power conversion efficiencies of bulk heterojunction polymer solar cells achieved was up to 5.30 % and 7.21 % for P1 and P2 as donor and PC71BM as acceptor. The enhanced Voc and Jsc for P2 based device can be mainly ascribed to the lower HOMO energy levels and higher hole mobility and better morphology of the fluorinated copolymer P2:PC71BM blend. Key words: Low bandgap copolymers, substitution of fluorine atom, bulk heterojunction solar cells, solvent additives
Добавил в систему: Куклин Сергей Александрович

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Synthesis of new D-A1-D-A2 type low bandgap terpolymers based on different thiadiazoloquinoxaline acceptor units for efficient polymer solar cellsстатья

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