Abstract
| Original language | English |
|---|---|
| Pages (from-to) | 315-319 |
| Journal | Applied surface science |
| Volume | 421 |
| Issue number | Part B |
| DOIs | |
| Publication status | Published - 1 Nov 2017 |
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Keywords
- Cr doped ZnS
- dielectric function
- Ellipsometry
- ZnS
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Ellipsometric study of the optical response of ZnS:Cr for PV applications. / Brakstad, Thomas; Hope, Benjamin R.; Nematollahi, Mohammadreza; Kildemo, Morten; Podraza, Nikolas J.; Ghimire, Kiran; Reenaas, Turid W.
In: Applied surface science, Vol. 421, No. Part B, 01.11.2017, p. 315-319.Research output: Contribution to journal › Article › Academic › peer-review
TY - JOUR
T1 - Ellipsometric study of the optical response of ZnS:Cr for PV applications
AU - Brakstad, Thomas
AU - Hope, Benjamin R.
AU - Nematollahi, Mohammadreza
AU - Kildemo, Morten
AU - Podraza, Nikolas J.
AU - Ghimire, Kiran
AU - Reenaas, Turid W.
PY - 2017/11/1
Y1 - 2017/11/1
N2 - Optical properties of highly chromium doped (2–4 at.%) zinc sulfide made by pulsed laser deposition have been studied by spectroscopic ellipsometry in the spectral range of 0.73–5.90 eV. The characteristic optical features of the ZnS are a direct bandgap with absorption onset at 3.6 eV, with E0, E1 and E2 critical points around 3.7, 5.7 and 7 eV. Excitonic effects were observed to be strong in this material – in line with the literature. The sub-bandgap absorption accredited to the chromium doping appears as a broad sub-bandgap feature increasing monotonously with increased doping concentration at a given growth temperature. In this report, we discuss three different approaches to extract and analyze the optical properties in terms of the complex dielectric function.
AB - Optical properties of highly chromium doped (2–4 at.%) zinc sulfide made by pulsed laser deposition have been studied by spectroscopic ellipsometry in the spectral range of 0.73–5.90 eV. The characteristic optical features of the ZnS are a direct bandgap with absorption onset at 3.6 eV, with E0, E1 and E2 critical points around 3.7, 5.7 and 7 eV. Excitonic effects were observed to be strong in this material – in line with the literature. The sub-bandgap absorption accredited to the chromium doping appears as a broad sub-bandgap feature increasing monotonously with increased doping concentration at a given growth temperature. In this report, we discuss three different approaches to extract and analyze the optical properties in terms of the complex dielectric function.
KW - Cr doped ZnS
KW - dielectric function
KW - Ellipsometry
KW - ZnS
U2 - 10.1016/j.apsusc.2016.10.157
DO - 10.1016/j.apsusc.2016.10.157
M3 - Article
VL - 421
SP - 315
EP - 319
JO - Applied surface science
JF - Applied surface science
SN - 0169-4332
IS - Part B
ER -