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Surface states effect on photoluminescence of CdS colloidal nanocrystalsстатья
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: 25 сентября 2013 г.
- Авторы: Katsaba A.V., Ambrozevich S.A., Vitukhnovsky A.G., Fedyanin V.V., Lobanov A.N., Krivobok V.S., Vasiliev R.B., Samatov I.G.
- Журнал: Journal of Applied Physics
- Том: 113
- Год издания: 2013
- Издательство: AIP Publishing
- Местоположение издательства: United States
- Первая страница: 184306-1
- Последняя страница: 184306-6
- DOI: 10.1063/1.4804255
- Аннотация: CdS colloidal nanocrystals with an average size of 4.5 nm and oleic acid as surfactant were studied using photoluminescence spectroscopy and time-correlated single photon counting technique at different temperatures. Observed spectra revealed three thermally activated luminescence bands at 2.15, 1.76, and 1.37 eV in addition to conventional band edge recombination of the nanocrystals. We present a kinetic model based on concept of single emitters which quantitatively describes the luminescence of the ensemble of the nanocrystals in the temperature range 10–300K. We determined activation energies (18.2 and 8.6 meV) for transitions responsible for the luminescence. The 1.76 eV band most probably emerges from the intrinsic defects on the surface of CdS, whereas bands at 2.15 and 1.37 eV result from the influence of oleic acid bonded to the surface of the nanocrystals.
- Добавил в систему: Васильев Роман Борисович