Optical properties of CdS micro/nanocrystalline structures prepared via a thermal evaporation method
| Autor: | J.J. Hassan, Sha Shiong Ng, S. J. Kasim, Zainuriah Hassan, M.A. Mahdi |
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| Rok vydání: | 2014 |
| Předmět: |
Photoluminescence
Materials science Band gap Mechanical Engineering Nanowire Analytical chemistry Nanotechnology Condensed Matter Physics Microstructure Cadmium sulfide Nanocrystalline material chemistry.chemical_compound symbols.namesake chemistry Mechanics of Materials symbols General Materials Science Raman spectroscopy Wurtzite crystal structure |
| Zdroj: | Materials Science in Semiconductor Processing. 26:87-92 |
| ISSN: | 1369-8001 |
| DOI: | 10.1016/j.mssp.2014.04.015 |
| Popis: | Cadmium sulfide (CdS) micro/nanocrystalline structures were fabricated by thermal evaporation in the absence of a catalyst on ITO-coated glass and Si(100) substrates. The samples prepared at 520 °C showed two structures of CdS: nanowires (NWs) and necklace-like microstructures grown on Si(111) and ITO substrates, respectively. The crystalline structures of the grown CdS necklace-like microstructures and NWs were studied using XRD analysis. The CdS necklaces and NWs structures were formed with hexagonal (wurtzite) structure. Two emission bands (green and red) were observed in the photoluminescence spectra of the prepared samples. The green PL emission in both structures showed a strong blue-shift compared with the optical band gap of CdS. Raman spectra of the grown CdS micro/nanocrystalline structures show redshift in the fundamental (1LO) and overtone (2LO) peaks location compared with Raman bands of bulk CdS. |
| Databáze: | OpenAIRE |
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