کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5402943 | 1392746 | 2009 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Silicon-rich/silica multilayers: A means to provide a link between the excitonic 1D quantum confinement and the photoluminescence parameters
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The photoluminescence properties-intensity IPL, emission energy EPL and decay lifetime ÏPL-of silicon-rich silicon oxide (SRSO)/silica (SO) multilayers are investigated as a function of the optical pump flux (Ï) of an argon laser and the measurement temperature in four kinds of samples corresponding to different SRSO sublayer thicknesses (namely 0.7, 1.4, 3.3 and 4.5Â nm). The excitons created by the incident laser light mainly within the SRSO layers or at the SRSO/silica interface are confined in the multilayer growth direction (normal to the layers). This so-called 1D exciton quantum confinement effect has been independently described by two models (the state filling, the electron-hole exchange interaction). It is shown in this paper that both models are complementary since we have been able to reproduce, on the one hand, flux dependence of main PL features (energy, intensity and lifetime) of all fabricated samples and on the other hand, the evolution of the singlet-triplet energy splitting as a function of the SRSO sublayer thickness.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Luminescence - Volume 129, Issue 1, January 2009, Pages 73-80
Journal: Journal of Luminescence - Volume 129, Issue 1, January 2009, Pages 73-80
نویسندگان
C. Dufour, S. Chausserie, F. Gourbilleau,