The effect of preparation procedure on the optical properties of CdTe semiconductor nanoparticles (NPs) has been investigated. CdTe NPs have been prepared via two different methods, organometallic pyrolysis method and microwave assisted aqueous based method. The nanostructure for the prepared NPs via both methods was confirmed by transmission electron microscopy, absorption and photoluminescence spectroscopy. Comparison between the quantum yield emissions of the as-prepared NPs of both methods is presented. The results shows that CdTe NPs which prepared via microwave assisted aqueous method yielded a much higher quantum efficiency (>41%). Amplified stimulated emission is investigated at room temperature (300K) and at low temperature (10K). Lifetime is also measured.
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