Abstract
In this work, we report on the development of a reactive sputtering process for CdS:O for high efficiency CdTe solar cells. X-ray diffraction, UV-Vis-NIR spectrophotometry, and Rutherford backscattering spectrometry were used to characterize the crystal structure, composition, and optical properties, respectively. All films were slightly Cd-rich, while the bulk oxygen content increased up to 45 at. % in direct proportion to the O2 partial pressure. Optical absorption in cells was reduced by increasing the oxygen fraction in the sputtering ambient. Optimal performance was obtained from cells with CdS sputtered in a 6% O2/Ar ambient, yielding efficiency >14% and VOC >840 mV.
Original language | American English |
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Pages | 964-967 |
Number of pages | 4 |
DOIs | |
State | Published - 15 Oct 2014 |
Event | 40th IEEE Photovoltaic Specialist Conference, PVSC 2014 - Denver, United States Duration: 8 Jun 2014 → 13 Jun 2014 |
Conference
Conference | 40th IEEE Photovoltaic Specialist Conference, PVSC 2014 |
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Country/Territory | United States |
City | Denver |
Period | 8/06/14 → 13/06/14 |
Bibliographical note
Publisher Copyright:© 2014 IEEE.
NREL Publication Number
- NREL/CP-5K00-63726
Keywords
- cadmium sulfide
- cadmium telluride
- optical band gap
- sputtering
- thin-film photovoltaic cells