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Investigation of size dependent structural and optical properties of thin films of CdSe quantum dots |
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| Authors: | Madhulika Sharma AB Sharma RK Pandey |
| Affiliation: | a Department of Physics, Bhopal University, Bhopal 462 026, India b Department of Metallurgical Engineering and Materials Science, Indian Institute of Technology, Bombay, Powai, Mumbai 400076, India c University Institute of Technology, Barkatullah University, Bhopal 462026, India |
| Abstract: | Cadmium selenide (CdSe) quantum dots were grown on indium tin oxide substrate using wet chemical technique for possible application as light emitting devices. The structural, morphological and luminescence properties of the as deposited thin films of CdSe Q-dot have been investigated, using X-ray diffraction, transmission electron microscopy, atomic force microscopy and optical and luminescence spectroscopy. The quantum dots have been shown to deposit in an organized array on ITO/glass substrate. The as grown Q-dots exhibited size dependent blue shift in the absorption edge. The effect of quantum confinement also manifested as a blue shift of photoluminescence emission. It is shown that the nanocrystalline CdSe exhibits intense photoluminescence as compared to the large grained polycrystalline CdSe films. |
| Keywords: | A Nanostructures B Luminescence B Chemical synthesis C X-ray diffraction C Atomic force microscopy C Electron microscopy |
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