Journal
SOLAR ENERGY MATERIALS AND SOLAR CELLS
Volume 95, Issue 10, Pages 2848-2854Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.solmat.2011.05.047
Keywords
Cu2O; Cuprous oxide; Optical properties; Exciton absorption
Funding
- Fondazione Cassa di Risparmio di Trento e Rovereto
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The optical absorption coefficient of thin film and bulk Cu2O at room temperature is obtained from an accurate analysis of their transmittance and reflectance spectra. These absorption spectra are modeled, together with the low temperature data reported in the literature, using an analytical expression to assess and quantify the role of the different absorption mechanisms. The results suggest that direct forbidden transitions and indirect transitions play an almost equally relevant role. A table of the optical constants of Cu2O single crystal is given for reference. (C) 2011 Elsevier B.V. All rights reserved.
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