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 SM ISO690:2012MONAICO, Eduard, URSACHI, Veaceslav, TIGINYANU, Ion, DASHEVSKY, Zinovi, KASIYAN, Vladimir, BOYD, Robert W.. Porosity-induced blueshift of photoluminescence in CdSe. In: Journal of Applied Physics, 2006, vol. 100, p. 0. ISSN 0021-8979. DOI: https://doi.org/10.1063/1.2338833 |
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  Journal of Applied Physics |
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| Volumul 100 / 2006 / ISSN 0021-8979 /ISSNe 1089-7550 | ||||||
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| DOI:https://doi.org/10.1063/1.2338833 | ||||||
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Porous CdSe layers have been fabricated by anodic etching of n-type single crystalline substrates with different values of conductivity. The morphology and porosity of the layers thus produced were found to be controlled by the conductivity of the material, anodization voltage, and conditions of in situ UV illumination. The porosity-induced changes in the photoluminescence spectra were studied. The decrease of the skeleton size down to 10-20 nm was found to result in a blueshift of the excitonic emission lines by 10 meV which was attributed to quantum-size effects in the nanocrystalline CdSe porous skeleton. An increase of the exciton-LO-phonon interaction by a factor of 1.5 in a weak-to-intermediate confinement regime was deduced from the analysis of temperature dependence of the free exciton luminescence line. |
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| Cuvinte-cheie Engineering controlled terms Anodic oxidation, Cadmium compounds, Electric conductivity, Excitons, Light emission, Porous materials Engineering uncontrolled terms Photoluminescence spectra, Porosity-induced changes, Quantum-size effects, Single crystalline substrates Engineering main heading Photoluminescence |
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