Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1673878 | Thin Solid Films | 2008 | 5 Pages |
Abstract
Zinc oxide (ZnO) films were prepared on glass substrates by chemical bath deposition at 50 °C. A solution of zinc nitrate, ammonium citrate tribasic and sodium hydroxide was used, and various deposition conditions were investigated. The optimal ratio of [Zn(NO3)2]:[(NH4)3C6H5O7]:[NaOH] was 10.0:4.0:4.3, and the optimal annealing temperature was 400 °C. X-ray diffraction patterns showed that the annealed films prepared at the optimal ratio have a wurtzite structure. Scanning electron micrograph showed that the film consists of nanoparticles with a size of several decade nanometers. Transmittance spectra showed high optical absorption below 380 nm and transmittance over 80% in the range of 400-900 nm. The optical band gap of the film annealed at 400 °C was 3.26 eV, and the dark electrical resistivity was with an order of 103 Ωcm at room temperature.
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Physical Sciences and Engineering
Materials Science
Nanotechnology
Authors
Z.Y. Wu, J.H. Cai, G. Ni,