Quantum confinement effect in ZnO thin films grown by pulsed laser deposition
2008; American Institute of Physics; Volume: 93; Issue: 17 Linguagem: Inglês
10.1063/1.3010376
ISSN1520-8842
AutoresJia-Cai Nie, Jack Yang, Yidan Piao, H. Li, Yuanping Sun, Qi Xue, C. M. Xiong, Rui Fen Dou, Qing Yun Tu,
Tópico(s)Copper-based nanomaterials and applications
ResumoHigh quality crystalline nanostructured ZnO thin films were fabricated by pulsed laser deposition on (0001) sapphire substrates. The films were investigated by x-ray diffraction, scanning electron microscopy, and optical absorption spectroscopy. The exciton peak energy from absorption spectra was used to determine the band gap energy Eg, which was found to increase systematically with the decrease in the mean grain size and ranged from 3.388to3.647eV. This is consistent with the quantum confinement model and, up until now, not observed in a convincing manner in the ZnO thin films.
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