Details

Autor(en) / Beteiligte

• Gu, Changdong
• Li, Jun
• Lian, Jianshe
• Zheng, Guoqu

Titel

Electrochemical synthesis and optical properties of ZnO thin film on In2O3:Sn (ITO)-coated glass

Ist Teil von

• Applied surface science, 2007-06, Vol.253 (17), p.7011-7015

Erscheinungsjahr

2007

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• ZnO thin films were electrochemically deposited onto the ITO-coated glass substrate from an electrolyte consisted of 0.1 M Zn(NO3)2 aqueous solution at 65 plus/minus 1 deg C. A compact ZnO film with (0 0 2) preferred orientation was obtained at the applied potential of - 1.3 V for 1200 s. It was also found that the morphology of the ZnO films grown at the potential of - 1.3 V was characterized of single or coalescent hexagonal platelets. However, the ZnO crystals grown at the potential of - 2.0 V was changed to be a bimodal size distribution. The band gap energy of the as deposited ZnO films, about 3.5 eV, was independent of both the applied potential and the deposition time, respectively. The minor amount of Zn(OH)2 might be co-deposited with the formation of ZnO revealed by the FT-IR spectroscopy. Three strategies to improve the ZnO crystal quality based on the photoluminescence properties were proposed in the paper, which were (a) adopting the lower deposition potential, (b) increasing the deposition time at a certain potential, and (c) annealing after as-deposition, respectively.