Impact of degenerate n-doping on the optical absorption edge in transparent conducting cadmium oxide

S. K.Vasheghani Farahani, C. F. McConville, T. D. Veal, A. Schleife

Research output: Chapter in Book/Report/Conference proceedingConference contribution


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.

Original languageEnglish (US)
Title of host publicationOxide-Based Materials and Devices IV
StatePublished - 2013
Externally publishedYes
EventOxide-Based Materials and Devices IV - San Francisco, CA, United States
Duration: Feb 3 2013Feb 6 2013

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X


OtherOxide-Based Materials and Devices IV
Country/TerritoryUnited States
CitySan Francisco, CA


  • Bandgap renormalization
  • Burstein-Moss shift
  • Cadmium oxide
  • Effective mass
  • Electronic structure
  • Optical absorption
  • Parameter-free calculations

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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