Наукова електронна бібліотека
періодичних видань НАН України
періодичних видань НАН України
Photoluminescence of ZnSe nanocrystals at high excitation level
Репозиторій DSpace/Manakin
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Photoluminescence of ZnSe nanocrystals at high excitation level
Тема:
Квантовые эффекты в полупpоводниках и диэлектриках
Інший ID:
PACS: 78.67.Bf, 78.67.Hc, 78.55.Et
Посилання:
Photoluminescence of ZnSe nanocrystals at high excitation level / V.V. Tishchenko, A.V. Kovalenko // Физика низких температур. — 2009. — Т. 35, № 5. — С. 524-527. — Бібліогр.: 12 назв. — англ.
Підтримка:
Support of this work by Fundamental Research State
Fund of Ukraine (Ô25.4/207 Project) is gratefully acknowledged.
Дата:
2009
Переглядів:
626
Завантажень:
448
Анотація:
The excitation-dependent photoluminescence (PL) of ZnSe nanocrystals (NC) grown on GaAs (100) substrate was studied. The PL spectra observed corroborate previous observations of a bimodal size distribution of NC grown, and, in addition, evidence the existence of spectral diffusion with extend dependent on excitation power. Besides, it was also shown that at relatively intense excitation an extra band has arose in luminescence spectra due to biexcitons confined in NC of 3.5–4.0 nm size. The binding energy of these biexcitons was as large as 23 meV.
