Studies on Optical Properties of CdS/ZnO Quantum Dots Prepared by Sol-Gel Method

Liyana Mohd Lawi Ruhana; Taqiyuddin Mawardi Ayob Muhammad; Radiman Shahidan; Irman Abdul Rahman; Bohari M. Yamin

doi:10.4028/www.scientific.net/AMR.364.129

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 364Studies on Optical Properties of CdS/ZnO Quantum...

Studies on Optical Properties of CdS/ZnO Quantum Dots Prepared by Sol-Gel Method

Abstract:

CdS/ZnO quantum dots (QDs) were prepared at a temperature of 293 K by the sol-gel method with Triethanolamine (TEA) as a capping agent. The effect of CdS/ZnO mixture ratio of 1:9, 1:1 and 9:1 on the optical absorption and fluorescence spectra were investigated by UV-Vis and Fluorescence spectroscopy. By increasing ZnO composition, a blue-shift of absorption edge and emission spectra were observed. The band gap for 1:9, 1:1 and 9:1 were found to be 4.13, 3.93 and 3.11 eV, respectively. The morphology of the CdS/ZnO QDs for each mixing ratio was obtained by transmission electron microscope (TEM). The size of the QDs was found to be in the range of 5-10 nm with some agglomerated particles.

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Advanced Materials Research (Volume 364)

Pages:

129-133

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.364.129

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Online since:

October 2011

Authors:

Liyana Mohd Lawi Ruhana, Taqiyuddin Mawardi Ayob Muhammad, Radiman Shahidan, Irman Abdul Rahman, Bohari M. Yamin

Keywords:

CdS/ZnO, Optical Property, Quantum Dot (QD), Sol-Gel (SG)

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