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Structural and photoluminescence properties of Zn1-xMnxO nanoparticles for optoelectronic device applications

D. SREEKANTHA REDDY1,* , S. K. SHARMA2, Y. D. REDDY3, B. S. REDDY3, K. R. GUNASEKHAR2, P. SREEDHARA REDDY3

Affiliation

  1. Department of Physics, Chungbuk National University, Cheongju 361-763, Republic of Korea
  2. Department of Instrumentation, Indian Institute of Science, Bangalore-560012, India
  3. Department of Physics, Sri Venkateswara University, Tirupati-517502, India

Abstract

High intense photoluminescence Zn1-xMnxO powder samples were prepared by simple solid state reaction method. All the samples were studied for their morphological, structural and photoluminescence properties. X-ray diffraction (XRD) results showed that all the samples were polycrystalline with wurtzite structure. The lattice parameters ‘a’ and ‘c’ varied linearly with composition following Vegard’s law in this composition range. Scanning Electron Microscopy (SEM) studies showed that all the samples investigated were in nanoparticles form with the particle size lying in the range 25 – 50 nm. The room temperature photoluminescence spectra show that the UV emission gradually shifted towards the higher energy side. A blue-shift in the position along with an intense blue emission band was observed with the Mn concentrations, which are ascribed to the quantum confinement effect..

Keywords

Diluted Magnetic semiconductors; Optoelectronics; Nanoparticles; Photoluminescence.

Submitted at: March 12, 2008
Accepted at: Oct. 7, 2008

Citation

D. SREEKANTHA REDDY, S. K. SHARMA, Y. D. REDDY, B. S. REDDY, K. R. GUNASEKHAR, P. SREEDHARA REDDY, Structural and photoluminescence properties of Zn1-xMnxO nanoparticles for optoelectronic device applications, Journal of Optoelectronics and Advanced Materials Vol. 10, Iss. 10, pp. 2607-2610 (2008)