Synthesis and Characterization of Semiconductor Nanocrystals: Photoluminescence and Size Tunability
Neelam Hazoor Zaidi

Dr. Neelam Hazoor Zaidi, Department of Chemistry, School of Science, College of Engineering Science and Technology, Fiji National University, Samabula-3722, Fiji.
Manuscript received on December 22, 2014. | Revised Manuscript Received on December 24, 2014. | Manuscript published on December 18, 2014. | PP: 19-21 | Volume-2, Issue-1, December 2014.
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Abstract: Semiconductor nanoparticles are presently of great interest for their practical applications such as zero-dimensional quantum confined materials and for their applications in optoelectronics and photonics. The optical properties get modified dramatically due to the confinement of charge carriers within the nanoparticles. Similar to the effects of charge carriers on optical properties, confinement of optical and acoustic phonons leads to interesting changes in the phonon spectra. In the present work, we have synthesized nanoparticles of CdSe using thermal decomposition technique. Transmission electron Microscopy (TEM), Absorption spectroscopy and fluorescence spectroscopy have been used for characterization. Under room temperature condition highly luminescent particles emit in visible region, can be synthesized. Broadening of this photoluminescence spectra is due to the defects such as vacancies, which are probably located close to the surface in case of nanoparticles.
Keywords: Nanoparticles, optical properties, photoluminescence,