Physics – Condensed Matter – Materials Science
Scientific paper
2012-02-28
Physics
Condensed Matter
Materials Science
16 pages, 6 figures, submitted to Journal of Physics D
Scientific paper
We report on low temperature photoluminescence (PL) and EPR study of bulk polycrystalline ZnO . Variation of peak position of donor bound exciton transition (D1XA) and FXAn=1-1LO with pump intensity show red shift and blue shift respectively due to exciton-exciton scattering. EPR spectra reveals three peaks at g value of 1.985, 1.956 and 1.939 respectively, g=1.956 and g=1.985 is due to shallow donors Zn interstitial and oxygen vacancy respectively An EPR spectrum at 100 K reveals higher degree of asymmetry and hyperfine splitting due to crystal field and inhomogeneous relaxation of paramagnetic centers. Strength of crystal field splitting (CFS) and spin orbit coupling (SOC) in sample is discussed using PL peak position of various excitonic emissions. Whereas, inhomogeneous relaxation of paramagnetic centers is discussed in terms of their activation energy during thermal quenching process.
No associations
LandOfFree
Defect related photoluminescence and EPR study of sintered polycrystalline ZnO does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Defect related photoluminescence and EPR study of sintered polycrystalline ZnO, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Defect related photoluminescence and EPR study of sintered polycrystalline ZnO will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-612944