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Weak charge-transfer complexes based on conjugated polymers for plastic solar cellsстатья
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: 18 июля 2013 г.
- Авторы: Bakulin A.A., Elizarov S.G., Khodarev A.N., Martyanov D.S., Golovnin I.V., Paraschuk D.Y., Triebel M.M., Tolstov I.V., Frankevich E.L., Arnautov S.A., Nechvolodova E.M.
- Журнал: Synthetic Metals
- Том: 147
- Номер: 1-3
- Год издания: 2004
- Издательство: Elsevier BV
- Местоположение издательства: Netherlands
- Первая страница: 221
- Последняя страница: 225
- Аннотация: As known for short conjugated molecules, the absorption band of a weak (Mulliken) charge-transfer complex (CTC) can be tuned in the region where both the donor and acceptor are transparent. This can be used for tailoring low-band gap absorbing materials to match the solar spectrum. We studied donor/acceptor blends of poly[2-methoxy-5-(2’-ethyl-hexyloxy)-1,4-phenylene vinylene] (MEH-PPV) with 2,4,7-trinitrofluorenone or 2,6-dinitroantraquinone by a number of optical and photoelectric methods. From optical and vibrational IR absorption spectra, we found that the donor/acceptor blends demonstrate noticeable ground-state interaction indicating CTC formation. The CTC is characterized by a long absorption tail extending to the near-IR region. The blends also show strong quenching of photoluminescence (PL) and a near-IR photoinduced absorption (PIA) band, indicating donor/acceptor charge-transfer. Essentially, this band appears for both visible and IR pump wavelengths. In addition, to probe the charge photogeneration mechanisms, a magnetic field spin effect technique was applied. This technique shows that the charge photogeneration mechanism is essentially different in the blends compared to pristine MEH-PPV. Furthermore, photoconductivity in the blends strongly increases compared to pristine MEH-PPV and the photocurrent action spectrum closely follows to the extended absorption tail. We discuss photoinduced charge-transfer and relaxation of photoexcited CTC as possible mechanisms of mobile charge generation.
- Добавил в систему: Паращук Дмитрий Юрьевич