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Annealing effect on structural and optical properties of diluted magnetic semiconducting Zn1-xMnxS nanostructured films

Reddy, D. Sreekantha and Reddy, M. Maheswara and Kang, Byeongwon and Yu, Seong-Cho and Rao, K. Narasimha and Gunasekhar, K. R. and Reddy, B. K. and Reddy, P. Sreedhara (2008) Annealing effect on structural and optical properties of diluted magnetic semiconducting Zn1-xMnxS nanostructured films. Solid State Sciences, 10 (8). pp. 1068-1073. ISSN 1293-2558

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Abstract

Nanostructured Zn1−xMnxS films (0 ≤ x ≤ 0.25) were deposited on glass substrates by simple resistive thermal evaporation technique. All the films were deposited at 300 K and the films were annealed at 573 K for 2 h in a vacuum of 2 × 10−6 mbar. All the deposited films were characterized by chemical, structural, morphological, optical and photoluminescence studies. Scanning Electron Microscopy (SEM) and Atomic Force Microscopy (AFM) studies showed that all the films investigated were in nanocrystalline form with the particle size lying in the range 10–25 nm. All the films exhibited cubic structure and the lattice parameter varied linearly with composition. The Zn1−xMnxS films showed an absorption coefficient >104 cm−1 with the energy band gap 3.44–4.04 eV measured at room temperature. The nanostructured Zn0.90Mn0.10S films exhibit high photoluminescence intensity at room temperature.

Item Type:Article
Subjects:Physical Science > Nanophysics
Material Science > Nanofabrication processes and tools
Physical Science > Nano objects
Material Science > Nanostructured materials
Physical Science > Photonics
Divisions:Faculty of Engineering, Science and Mathematics > School of Physics
Faculty of Engineering, Science and Mathematics > School of Chemistry
ID Code:3936
Deposited By:JNCASR
Deposited On:27 Jan 2009 03:56
Last Modified:26 Mar 2009 16:58

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