Thermal-lens study of thermo-optical properties of CdSe/ZnS quantum dots embedded into PMMA matrix

Viviane Pilla; Egberto Munin; Leandro P. Alves; Marcos T. T. Pacheco

doi:10.1117/12.701118

5 February 2007 Thermal -lens study of thermo-optical properties of CdSe/ZnS quantum dots embedded into PMMA matrix

Viviane Pilla, Egberto Munin, Leandro P. Alves, Marcos T. T. Pacheco

Proceedings Volume 6481, Quantum Dots, Particles, and Nanoclusters IV; 648105 (2007) https://doi.org/10.1117/12.701118
Event: Integrated Optoelectronic Devices 2007, 2007, San Jose, California, United States

Abstract

Thermal Lens (TL) and spectroscopic characterizations were performed in CdSe/ZnS core-shell nanoparticles embedded into the underlying polymethyl methacrylate (PMMA) dissolved in chloroform (CHCl₃). TL measurements were accomplished in function of the CdSe/ZnS quantum-dot concentration (12-60 mg/ml). The average value obtained for the thermal diffusivity was (0.85 ± 0.02) x 10^-3 cm²/s. The absolute nonradiative quantum efficiency φ and the fluorescence quantum efficiency η were determined by the TL method. Higher values of φ were obtained with the increase of the core-shell nanoparticles concentrations in PMMA-chloroform solutions. These results are in agreement with the behavior of fluorescence spectra that decrease with CdSe/ZnS concentration increase.

Citation Download Citation

Viviane Pilla, Egberto Munin, Leandro P. Alves, and Marcos T. T. Pacheco "Thermal -lens study of thermo-optical properties of CdSe/ZnS quantum dots embedded into PMMA matrix", Proc. SPIE 6481, Quantum Dots, Particles, and Nanoclusters IV, 648105 (5 February 2007); https://doi.org/10.1117/12.701118

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