Impact of degenerate n -doping on the optical absorption edge in transparent conducting cadmium oxide
Impact of degenerate n -doping on the optical absorption edge in transparent conducting cadmium oxide
复制标题
简并n掺杂对透明导电氧化镉光吸收边的影响
DOI：
10.1117/12.2004359
复制
发表时间：
2013
期刊：
影响因子：
--
通讯作者：
Vasheghani Farahani S
中科院分区：
文献类型：
--
作者：
Vasheghani Farahani S
为了促进下一代显示设备或现代太阳能电池的开发，材料性能至关重要。在光谱范围内的高透明度和在环境条件下的高电导率的组合对于许多应用来说是有吸引力的，如果不是至关重要的话。虽然掺杂诱导的CdO导带中的自由电子的存在可以将电导率提高到技术应用所需的值，但是，预计它同时会影响光学性质。更具体地说，已经报道了带隙、有效电子质量和光吸收起始的变化。在这项工作中，从现代理论光谱技术的最新结果进行比较，以讨论不同的影响，是相关的准确理解的吸收边的存在下，具有不同浓度的自由电子的光学带隙的实验值。
In order to facilitate the development of next-generation display devices or modern solar cells, material performance is critically important. A combination of high transparency in the optical spectral range and high electrical conductivity under ambient conditions is attractive, if not crucial, for many applications. While the doping-induced presence of free electrons in the conduction bands of CdO can increase the conductivity up to values desired for technological applications, it is, however, expected to impact the optical properties at the same time. More specifically, variations of the band gap, effective electron mass, and optical-absorption onset have been reported. In this work recent results from modern theoretical spectroscopy techniques are compared to experimental values for the optical band gap in order to discuss the different effects that are relevant for an accurate understanding of the absorption edge in the presence of free electrons with different concentrations.