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CdS quantum dots in hybrid sol–gel matrix; absorption and room-temperature photoluminescence

2003; American Institute of Physics; Volume: 95; Issue: 2 Linguagem: Inglês

10.1063/1.1633651

1520-8850

Kwang‐Sun Kang, K. Daneshvar,

Nanocluster Synthesis and Applications

Strong room-temperature luminescence spectra for cadmium sulfide (CdS) nanometer quantum dots (NQDs) were obtained using a xenon lamp. The samples were fabricated of various concentrations of semiconductor NQDs in the hybrid sol–gel matrix. Concentration dependent total absorption showed a linear relationship following the Beer–Lambert law. An excess H2S source reduced the luminescence intensity, shifted the spectra peak to the red, and broadened the spectra. These excess H2S phenomena disappeared after a certain period of time in ambient conditions. The result showed that strong luminescence in CdS in hybrid-sol–gel matrix can be achieved without any casing.