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Colloidal quantum dots InP@ZnS: Inhomogeneous broadening and distribution of luminescence lifetimesстатья
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: 24 октября 2018 г.
- Авторы: Brichkin S.B., Spirin M.G., Tovstun S.A., Gak V.Yu, Mart'yanova E.G., Razumov V.F.
- Журнал: High Energy Chemistry
- Том: 50
- Номер: 5
- Год издания: 2016
- Издательство: Pleiades Publishing, Ltd
- Местоположение издательства: Road Town, United Kingdom
- Первая страница: 395
- Последняя страница: 399
- DOI: 10.1134/S0018143916050064
- Аннотация: Indium phosphide colloidal quantum dots with a zinc sulfide shell, an average core diameter of 3 nm, a luminescence peak position of 600 nm, and a luminescence quantum yield up to 50% have been synthesized. By analyzing the stationary absorption and luminescence spectra in terms of the Kennard-Stepanov relationship, the values of homogeneous width and inhomogeneous broadening have been obtained, which determine the resulting width of the spectra: the corresponding full widths at half maximum (FWHM) were 31, 63, and 70 nm. From the value of inhomogeneous broadening and the sizing curve of indium phosphide, polydispersity of the synthesized particles has been estimated as 11%. Analysis of the luminescence decay kinetics has revealed three reproducible peaks with maxima near 4.35, 35 (main) and 200 ns in the lifetime distribution. It has been found that although repeated washing of the synthesized particles with methanol can decrease the quantum yield, the lifetime distribution observed remains constant, which in the context of the "blinking" effect indicates a very short luminescence decay time of the particles in the OFF-state.
- Добавил в систему: Разумов Владимир Федорович