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Electronic and optical properties of Cd1-xZnxS nanocrystals |
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| Authors: | N Safta A Sakly H Mejri Y Bouazra |
| Institution: | (1) Laboratoire de Physique des Semi-conducteurs et des Composants électroniques, Faculté des Sciences, Avenue de l'environnement, 5000 Monastir, Tunisia;(2) Unité de Physique Quantique, Faculté des Sciences, Avenue de l'environnement, 5000 Monastir, Tunisia;(3) école Préparatoire aux Académies Militaires, Avenue Maréchal Tito, 4029 Sousse, Tunisia |
| Abstract: | We report a numerical simulation of the conduction and valence band edges of Cd1-xZnxS nanocrystallites using a one — dimensional potential model. Electron — hole pairs are assumed to be confined in nanospheres of finite barrier heights. Optical absorption measurements are used to fit the bandgap of the Cd1-xZnxS nanocrystal material. A theoretical analysis is also made to calculate the energy location of bound excitons and the oscillator strength of interband transitions as a function of zinc composition. The aim of the latter study is to investigate the optical behavior of Cd1-xZnxS nanocrystals. An attempt to explain all the results is presented. |
| Keywords: | 73 21 La Quantum dots 73 22 -f Electronic structure of nanoscale materials: clusters nanoparticles nanotubes and nanocrystals 71 55 Gs II-VI semiconductors |
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