کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7223404 | 1470559 | 2018 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Incorporation of CdSe quantum dots (QDs) in KH2PO4 (KDP) crystalline host: Processes of elaboration and characterization
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مهندسی (عمومی)
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چکیده انگلیسی
The aim of this work is to survey experimentally the effect of doping CdSe quantum dots (QDs) on structural and optical properties of Di-hydrogen phosphate KH2PO4 (KDP) single crystal, where we expose a simple and reproduced technic to obtain KDP:CdSe single crystal starting from aqueous solution phase. In order to characterize the samples comfortably, the obtained crystals were cleaved into pellets with suitable size each surface being parallel to the faces (100). The XRD results denote that the CdSe QDs inside KDP single crystal have only one preferred direction (110) and the estimated size as derived from Sheere's formula proved the nano-regime of guest material. On the other side, UV-vis absorption spectrums appear that a pure KDP crystal has transparence property in the visible range with a large window where Eg (KDP) â 7.17â¯eV. However, KDP:CdSe sample exhibits two bands located at 425â¯nm and 625â¯nm attributed to the transition band to band and excitonic, respectively. As an accordance result, photoluminescence (PL) measurements indicate that the band gap of CdSe QDs inside KDP single crystal appears a significant amount of blue-shift (ÎEg â¯=â¯0.284â¯eV) due to well recognized quantum confinement effect exerted by the CdSe QDs.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Optik - Volume 168, September 2018, Pages 174-178
Journal: Optik - Volume 168, September 2018, Pages 174-178
نویسندگان
Samyia Addala, Lazhar Bouhdjer, Ouahiba Halimi, Miloud Sebais, Boubaker Boudine, Aicha Bensouici,