Title:
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Study of the refractive index change in a-Si:H thin films patterned by 532 nm laser radiation for photovoltaic applications
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Author:
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Colina Brito, Mónica Alejandra; Molpeceres Alvarez, Carlos; Holgado, Miguel; Gandía, Javier; Nos, Oriol; Ocaña, José L.
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Other authors:
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Universitat Politècnica de Catalunya. Departament d'Enginyeria Electrònica; Universitat Politècnica de Catalunya. MNT - Grup de Recerca en Micro i Nanotecnologies |
Abstract:
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Laser scribing of hydrogenated amorphous silicon (a-Si:H) is a crucial step in the fabrication of thin film photovoltaic modules. During such process, inherent thermo-mechanical effects associated to laser ablation mechanisms lead to thermal damages. In that sense, the state of the material remaining in the vicinity of the
ablated area has a critical influence on the electrical properties of the final devices. In this work, a comprehensive analysis of refractive index variations for the material surrounding the ablated area by means
of Infrared–Visible Fourier transform spectrometry is proposed. Besides, in order to evaluate the material microstructure, Raman spectroscopy is employed as a complimentary technique. It was seen that the
refractive index variation decreased as the distance from the center of the ablated groove was increased.
Likewise, a clear transition from highly crystalline to amorphous material could be also observed as a function of the distance from the groove. |
Subject(s):
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-Àrees temàtiques de la UPC::Enginyeria electrònica -Àrees temàtiques de la UPC::Energies::Energia solar fotovoltaica -Photovoltaic cells -Photovoltaic power generation. -Energia solar -- Aparells i accessoris -Silicones -Bateries solars |
Rights:
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Document type:
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Article - Published version Article |
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