کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5348541 | 1388083 | 2016 | 23 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Light-emitting structures of CdS nanocrystals in oxidized macroporous silicon
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Light-emitting structures of CdS nanocrystals in oxidized macroporous silicon Light-emitting structures of CdS nanocrystals in oxidized macroporous silicon](/preview/png/5348541.png)
چکیده انگلیسی
Structured silicon substrates (macroporous silicon) with SiO2 nanolayers and CdS nanocrystals were proposed to reduce the flow of electrons and recombination outside the nanoparticle layer. It was found that the resonance electron scattering in samples with low concentration of SiOSi states transforms into ordinary scattering on ionized impurities for samples with high concentration of SiOSi states. The maximal intensity of photoluminescence was measured for a structure with maximum strength of the local electric field at the SiSiO2 interface, indicating a significant decrease of non-radiative recombination in CdS nanocoating due to the flow of electrons from the silicon matrix towards the CdS nanocrystal layer. The quantum yield of photoluminescence increases with time due to evaporation of water molecules.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Surface Science - Volume 388, Part A, 1 December 2016, Pages 288-293
Journal: Applied Surface Science - Volume 388, Part A, 1 December 2016, Pages 288-293
نویسندگان
L. Karachevtseva, S. Kuchmii, O. Stroyuk, O. Lytvynenko, O. Sapelnikova, O. Stronska, Wang Bo, M. Kartel,