Effect of Different Substrate Temperature on Sb-Doped ZnO Thin Films Prepared by Pulsed Laser Deposition on Sapphire Substrates
Zhao Zi-Wen; Hu Li-Zhong; Zhang He-Qiu; Sun Jing-Chang; Bian Ji-Ming; Sun Kai-Tong; Chen Xi; Zhao Jian-Ze; Li Xue; Zhu Jin-Xia
Журнал:
Chinese Physics Letters
Дата:
2010-01-01
Аннотация:
Sb-doped ZnO thin films are deposited on c-plane sapphire substrates by pulsed laser deposition. Hall results indicate that the conductivity of the Sb-doped ZnO thin films is strongly dependent on the substrate temperature. The sample deposited at the temperature of 550°C exhibits p-type conductivity. It gives a resistivity of 15.25 Ω · cm, with a Hall mobility of 1.79cm<sup>2</sup>V<sup>−1</sup>s<sup>−1</sup> and a carrier concentration of 2.290 × 10<sup>17</sup> cm<sup>−3</sup> at room temperature. The x-ray diffraction indicates that the Sb-doped ZnO thin films deposited in the range of 450–650°C are high c-axis oriented. Low-temperature photoluminescence spectra indicate that the sample deposited at 550°C shows the strong acceptor-bound exciton (A<sup>0</sup>X) emission.
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