Synthesis of Cubic and Hexagonal CdTe Nanoparticles Dispersed in SiO2 Films: Role of Oxygen during Sintering
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概要
- 論文の詳細を見る
Cadmium telluride nanoparticles dispersed in SiO2 films have been grown by the co-sputtering of elemental Cd, Te and SiO2 targets in argon atmosphere. The role of oxygen during annealing on the structural and optical properties of CdTe nanoparticles dispersed in SiO2 films has been studied. Formation of a CdTeO3 layer around the CdTe nanoparticle core due to ambient oxygen present in air results in structural defects and thus the formation of hexagonal CdTe nanoparticles in air-annealed samples. In vacuum-annealed samples, defect free and well-crystallized cubic CdTe nanoparticles are formed which show excitonic features in the absorption spectra. These results have been confirmed by carrying out i) annealing in vacuum and air ambiences in a sequence on the same sample and ii) by depositing an additional layer of SiO2 on the CdTe:SiO2 samples to prevent the diffusion of ambient oxygen.
- Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
- 2005-11-15
著者
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Dayal Padullaparthi
Thin Film Laboratory Department Of Physics Indian Institute Of Technology-delhi
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Mehta Bodh
Thin Film Laboratory Department Of Physics Indian Institute Of Technology (iit)
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Mehta Bodh
Thin Film Laboratory, Department of Physics, Indian Institute of Technology-Delhi, New Delhi-110016, India
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Shivaprasad Sonnada
Surface Physics and Nanostructures Group, National Physical Laboratory, Dr. K. S. Krishnan Road, New Delhi-110012, India
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Shivaprasad Sonnada
Surface Physics Group, National Physical Laboratory, New Delhi-42, India
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