研究目的
Investigating the fabrication of copper indium gallium diselenide (CIGS) thin films by RF magnetron sputtering without an additional selenization process and the effects of substrate temperature on the physical properties of these films.
研究成果
The study demonstrated that CIGS thin films with stable chemical composition ratios can be deposited using a one-step sputtering process without any additional post-selenization process. The crystallinity of the CIGS thin film was greatly improved as the substrate temperature increased. However, the CIGS solar cell showed poor device performance, which was attributed to the unstable compositions locally present in the film as well as the Cu-rich and Se-poor characteristics. The study suggests that the one-step sputtering process can be a promising route for high-efficiency CIGS solar cells by the fine-tuning of the sputtering target.
研究不足
The CIGS solar cell made using the film showed a degraded cell efficiency of 2.5%, which might be caused by Cu-rich and Se-poor compositions and the locally unstable composition in the CIGS films. The study suggests that precise tuning is required for the target composition and process conditions to improve the composition uniformity of the CIGS thin film and the performance of the CIGS device.
