Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9812188 | Thin Solid Films | 2005 | 8 Pages |
Abstract
ZnO thin films are prepared on glass substrate by sol-gel spin-coating method and the effect of preheating temperature on c-axis preferred orientation and optical properties of the films are investigated. The ZnO thin film that was preheated at 275 °C and post-heated at 650 °C using a sol with Zn concentration of 0.7 mol/l is highly oriented along the (002) plane. The transmittances of ZnO thin films preheated at 200â¼300 °C and post-heated at 650 °C are over 85% in visible range and exhibit absorption edges at about 368 nm. The optical band gap energy is evaluated to be 3.24â¼3.26 eV. The photoluminescence shows the ultraviolet emission at near band edge and broad green-yellow radiation at 490â¼620 nm. The effect of preheating temperature on structural and optical properties of ZnO thin films is discussed.
Related Topics
Physical Sciences and Engineering
Materials Science
Nanotechnology
Authors
Young-Sung Kim, Weon-Pil Tai, Su-Jeong Shu,