• Corpus ID: 248525118

Ab initio theory of free-carrier absorption in semiconductors

@inproceedings{Zhang2022AbIT,
  title={Ab initio theory of free-carrier absorption in semiconductors},
  author={Xiao Zhang and Guangsha Shi and Joshua Leveillee and Feliciano Giustino and Emmanouil Kioupakis},
  year={2022}
}
The absorption of light by free carriers in semiconductors results in optical loss for all photon wavelengths. Since free-carrier absorption competes with optical transitions across the band gap, it also reduces the efficiency of optoelectronic devices such as solar cells because it does not generate electron-hole pairs. In this work, we develop a first-principles theory of free-carrier absorption taking both single particle excitations and the collective Drude term into account, and we… 

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Reference solar spectral irradiance: Air mass 1.5