Optical absorption and emission spectra are the important quantifiable properties for CuI as a promising optoelectronic material. Previous research on the sputter deposition of CuI focuses on room‐temperature growth. Herein, the effect of growth temperature on the selected optical features of sputtered CuI thin films is investigated. An enhanced visible light transparency and a steeper absorption edge are achieved for CuI thin films by optimizing the growth temperature. The PL intensity ratio of free exciton to defect‐related emission increases with increasing substrate temperature. These results suggest a strategy of growth temperature optimization for the enhanced absorption and emission of CuI for advanced optoelectronic applications.

中文翻译：

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溅射碘化铜薄膜的光吸收和发射的控制

光学吸收和发射光谱是作为有前途的光电材料的CuI的重要可量化特性。CuI溅射沉积的先前研究主要集中在室温下。在此，研究了生长温度对溅射的CuI薄膜的选定光学特性的影响。通过优化生长温度，CuI薄膜获得了增强的可见光透明度和更陡峭的吸收边缘。自由激子与缺陷相关发射的PL强度比随衬底温度的升高而增加。这些结果提出了一种生长温度优化的策略，以增强用于先进光电应用的CuI的吸收和发射。