论文标题
水吸附增强了透明p型CUI中的电导率
Water adsorption enhances electrical conductivity in transparent p-type CuI
论文作者
论文摘要
最近，CUI被重新发现为具有高功绩的P型透明导体。即使许多金属碘化物都是吸湿性的，尚未阐明水分对CUI电气性能的影响。在这项工作中，我们观察到暴露于环境湿度5小时后CUI的电导率增加了两倍，然后长期降解。同时，CUI的工作函数减少了近1 eV，这可以解释先前报道的工作函数值中的较大传播。电导率的增加是可逆的，并且在中间湿度水平上最大化。基于通过THZ光谱法测得的大晶体内迁移率，我们建议晶界的水合可能对整个孔迁移率有益。
CuI has been recently rediscovered as a p-type transparent conductor with a high figure of merit. Even though many metal iodides are hygroscopic, the effect of moisture on the electrical properties of CuI has not been clarified. In this work, we observe a two-fold increase in the conductivity of CuI after exposure to ambient humidity for 5 hours, followed by slight long-term degradation. Simultaneously, the work function of CuI decreases by almost 1 eV, which can explain the large spread in the previously reported work function values. The conductivity increase is partially reversible and is maximized at intermediate humidity levels. Based on the large intra-grain mobility measured by THz spectroscopy, we suggest that hydration of grain boundaries may be beneficial for the overall hole mobility.
