TY - GEN
T1 - Impact of degenerate n-doping on the optical absorption edge in transparent conducting cadmium oxide
AU - Farahani, S. K.Vasheghani
AU - McConville, C. F.
AU - Veal, T. D.
AU - Schleife, A.
PY - 2013
Y1 - 2013
N2 - 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.
AB - 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.
KW - Bandgap renormalization
KW - Burstein-Moss shift
KW - Cadmium oxide
KW - Effective mass
KW - Electronic structure
KW - Optical absorption
KW - Parameter-free calculations
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U2 - 10.1117/12.2004359
DO - 10.1117/12.2004359
M3 - Conference contribution
AN - SCOPUS:84878183560
SN - 9780819493958
T3 - Proceedings of SPIE - The International Society for Optical Engineering
BT - Oxide-Based Materials and Devices IV
T2 - Oxide-Based Materials and Devices IV
Y2 - 3 February 2013 through 6 February 2013
ER -