Photoluminescence Studies Of Microwave Assisted Synthesized Zno Micro Structures


Autoria(s): Junaid, Bushiri M; Gopakumar, V
Data(s)

12/08/2014

12/08/2014

05/01/2012

Resumo

ZnO micro particles in the range 0.4-0.6 μm were synthesized by microwave irradiation method. The XRD analysis reveals that the sample is in the wurtzite phase with orientation along the (101) plane. SAED pattern of the sample reveals the single crystalline nature of the micro grains. TEM images show the formation of cylindrical shaped ZnO micro structures with hexagonal faces. The optical phonon modes were slightly shifted in the Raman spectrum,attributed to the presence of various crystalline defects and laser induced local heating at the grain boundaries. A broad transmission profile was observed in the FTIR spectrum from 1550-3400 cm-1 which falls in the atmospheric transparency window region. PL spectrum centered at 500 nm with a broad band in the region 420-570 nm comprised of different emission peaks attributed to transition between defect levels. Various emission levels in the sample were expliained with a band diagram

Journal of Optoelectronics and Biomedical Materials Vol. 4, Issue 1, January-March 2012, p. 1 - 7

Cochin University of Science and Technology

Identificador

http://dyuthi.cusat.ac.in/purl/4563

Idioma(s)

en

Palavras-Chave #ZnO #Microwave assisted synthesis #Raman spectra #Photoluminescence
Tipo

Article