@inproceedings{dad521d4c7574769aefea514862803ad,
title = "Analysis of alloying and built-in voltage in thin film chalcogenide solar cells using modulation spectroscopy",
abstract = "Modulation spectroscopy has been performed on superstrate CdS/CdTe solar cells prepared by close-spaced sublimation. Photoreflectance (PR) measurements were conducted near the CdTe E0 band edge using a variable-wavelength probe beam in conjunction with a chopped pump beam. A fit to the observed PR spectrum was made using two third-derivative, low-field lineshapes. The band gap of the active material near the junction is 1.46 eV (CdTe1-xSx). The envelope function varied as 1 - V/Vbi· The PR spectrum shifted with a temperature coefficient of -0.31 meV/K. Photoreflectance spectroscopy offers a powerful method of determining absorber band gaps, alloying, and built-in voltage in thin-film solar cells.",
keywords = "CdTe, chalcogenide, photoreflectance, solar cell, spectroscopy, thin film",
author = "Delahoy, {Alan E.} and Zimeng Cheng and Jingong Pan and Shou Peng and Chin, {Ken K.}",
note = "Publisher Copyright: {\textcopyright} 2015 IEEE.; 42nd IEEE Photovoltaic Specialist Conference, PVSC 2015 ; Conference date: 14-06-2015 Through 19-06-2015",
year = "2015",
month = dec,
day = "14",
doi = "10.1109/PVSC.2015.7356019",
language = "English (US)",
series = "2015 IEEE 42nd Photovoltaic Specialist Conference, PVSC 2015",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
booktitle = "2015 IEEE 42nd Photovoltaic Specialist Conference, PVSC 2015",
address = "United States",
}