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Abstract
Boron and gallium co-doped ZnO (BGZO) films were prepared by radio-frequency (RF) magnetron sputtering under different RF powers (50–250W) at room temperature and 200°C, respectively. The influence of sputtering power and substrate temperature on the structural, morphological, electrical and optical properties of BGZO films was investigated. The results indicated that all the films showed preferentially c-axis orientation and structure of hexagonal wurtzite. The grain size decreased at higher sputtering power above 150W. The carrier concentration and optical band gap (Eg) increased with the increasing of RF sputtering power. At RF power of 150W, the films showed higher mobility and lower resistivity. Average optical transmittance of all the BGZO films is greater than 85% in the visible wavelength and did not change obviously with the sputtering power or substrate temperature.
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