Journal
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
Volume 42, Issue 6, Pages 1838-1843Publisher
ELSEVIER
DOI: 10.1016/j.physe.2010.02.005
Keywords
ZnO; PLD; Thin film; TCO
Funding
- DAE-BRNS
Ask authors/readers for more resources
Transparent conductive dysprosium doped ZnO (Dy:ZnO) thin films with preferential orientation in the (0 0 0 2) direction were deposited on (0 0 0 1) sapphire substrate by buffer assisted pulsed laser deposition. The experimental results show that the resistivity of Dy:ZnO thin films decreased to a minimum value of similar to 7.6 x 10(-4) Omega cm with increasing Dy concentration up to similar to 0.45 at%, then increased with the further increase of Dy concentration. On the contrary, the band gap and carrier concentration of Dy:ZnO thin films initially increased, then decreased with increase of Dy concentration. The blue shift of band gap of Dy:ZnO thin films with increasing carrier concentration was attributed to the competing effects of Burstein-Moss shift and band gap narrowing. A bright room temperature photoluminescence observed at similar to 575 nm in all the Dy:ZnO thin films, with maximum intensity at similar to 0.45 at% of Dy doping, was attributed to be due to intra-band transitions of Dy3+ in ZnO. Near band edge photoluminescence of ZnO was observed at similar to 380 nm with photoluminescence intensity decreasing with increase of Dy concentration. Such Dy:ZnO thin films are found to be suitable candidate for luminescent device applications. (C) 2010 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available