| Autor: |
V. Arivazhagan, M. Manonmani Parvathi, S. Rajesh, P. Predeep, Mrinal Thakur, M. K. Ravi Varma |
| Rok vydání: |
2011 |
| Předmět: |
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| Zdroj: |
AIP Conference Proceedings. |
| ISSN: |
0094-243X |
| DOI: |
10.1063/1.3646793 |
| Popis: |
Lead Selenide multilayer thin films were prepared by thermal evaporation technique by successive coatings of Lead and Selenium metals. The temperature of the substrates varied from low to high during the deposition. The optical characterization of the prepared films carried out using UV‐Vis‐NIR spectroscopy and Photoluminescence spectroscopy. The absorption edge towards shorter wavelength (300 nm) may be the quantum size effect at the interfaces of Lead and selenium layers. The films on low substrate temperature have the many linear regions in the optical band gap graph. The calculated band gap is larger than the bulk band gap value of the PbSe material. The room temperature Photoluminescence spectrum was studied under the excitation wavelength of 300 nm. The hot luminescence tail was observed at low temperature substrate. The Effective mass approximation and quantum mechanical models were used to study the quantum size effect of the prepared films and discussed in this paper. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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