POSITIVE SIDE OF DISORDER: STATISTICAL FLUORENE-CARBAZOLE-TTBTBTT TERPOLYMERS SHOW IMPROVED OPTOELECTRONIC AND PHOTOVOLTAIC PROPERTIES COMPARED TO THE REGIOREGULAR

Авторы: Akkuratov A.V., Susarova D.K., Razumov V.F., Troshin P.A., Mühlbach S., Seßler M., Zimmermann B.Würfel U
Сборник: STRUCTURES Solar Energy Materials & Solar Cells
Том: 160
Год издания: 2017
Первая страница: 346
Последняя страница: 354
DOI: 10.1016/j.solmat.2016.10.039
Аннотация: We report a systematic study of a family of statistical fluorene-carbazole-TTBTBTT terpolymers with a variable fluorene-to-carbazole ratio. It has been shown that changing the molecular composition of the polymers affects significantly their characteristics such as absorption spectrum, extinction coefficients, position of the frontier energy levels and charge carrier mobility. Power conversion efficiencies of 6.4–7.0% were obtained for the best-performing carbazole-rich and fluorene-rich terpolymers. Most importantly, we showed that optoelectronic properties (particularly, the extinction coefficients defining the light harvesting ability) and photovoltaic performances of conventional regioregular copolymers in the blends with [70]PCBM can be significantly improved simply by introducing a “rational disorder” in the polymer chains using statistical copolymerization of certain building blocks taken in appropriate ratios.
Добавил в систему: Разумов Владимир Федорович

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