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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-22 2:24 |
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Conference: Bucharest University Faculty of Physics 2010 Meeting
Section: Solid State Physics and Materials Science
Title:
Defects Generation in CdS/CdTe heterojunction Photovoltaic Cells by High-energy Proton Irradiation
Authors:
Sorina Iftimie (1), C. Tazlaoanu (1), M. Radu (1), Veta Ghenescu (2), Cristina Besleaga (1), T. L. Mitran (1), M. Gugiu (3), Nicoleta Dina (1), Oana Porumb (1), S. Antohe (1)
Affiliation:
(1) Faculty of Physics, University of Bucharest, 077125, Magurele-Ilfov, 405 Atomistilor, Romania
(2) Institute for Space Sciences, 077125, Magurele-Ilfov,409 Atomistilor,Romania
(3) ”Horia Hulubei” National Institute of Physics and Nuclear Engineering - IFIN HH, 077125, Magurele-Ilfov, 407 Atomistilor, Romania
E-mail
sorina.iftimie@fizica.unibuc.ro,
Keywords:
Solar cells, cadmium telluride, thin films, proton irradiation
Abstract:
Due to the small quantities of material required for their construction and their suitability for large scale manufacturing techniques, thin film CdTe/CdS solar cells have an enormous potential as a commercially viable source of electricity in the near future. With a direct bandgap of 1.45 eV at room temperature, CdTe is able to absorb a significant fraction of the solar spectrum under AM0 and AM1.5 conditions and seem to be a promising candidate for use in space technology. We report experimental results of high-energy proton irradiations with 3 MeV at 3x1014 protons/cm2 fluency on CdS/CdTe heterojunction solar cells. CdS/CdTe heterostructures have been prepared by conventional vacuum evaporation technique. The effects of irradiation were studied by investigating the changes in the electrical and optical properties of the cells. It was found that proton irradiation in the above mentioned conditions results mainly in the introduction of defects at the CdS/CdTe interface. A discussion about the possible origin of those defects is given.
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