New Manufacturing Approaches to Texture Formation and Thermal Expansion Matching in the Design of Highly Efficient Silicon Solar Photoconverters
- Authors: Nikitin S.E.1, Bobyl A.V.1,2, Avezova N.R.3, Terukov E.I.1
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Affiliations:
- Ioffe Institute
- St. Petersburg State Electrotechnical University “LETI”
- Physicotechnical Institute, Research-and-Production Association “Physics–Sun”, Uzbekistan Academy of Sciences
- Issue: Vol 52, No 13 (2018)
- Pages: 1782-1789
- Section: Fabrication, Treatment, and Testing of Materials and Structures
- URL: https://journals.rcsi.science/1063-7826/article/view/204963
- DOI: https://doi.org/10.1134/S1063782618130134
- ID: 204963
Cite item
Abstract
The causes of the failure of highly efficient silicon solar photoconverters are considered. About 30% of failures take place because of crack formation in silicon wafers and electrodes. Mechanical stresses leading to crack formation are associated with the pyramidal texture geometry and difference in the thermal expansion of the construction materials. A new procedure for silicon texturing is described, where SiOx precipitates perform the function of texture nuclei, which makes it possible to obtain a surface consisting of submicron concave spheroids, which sharply decreases reflection in the wavelength region of 330–550 nm. A new method of matching the thermal expansion of photoconverter design elements with the use of matching layers of iron–nickel alloys is proposed, which provides a substantial decrease in the failure probability by the crack-formation mechanism in silicon wafers and the delamination of electrodes.
About the authors
S. E. Nikitin
Ioffe Institute
Author for correspondence.
Email: nikitin@mail.ioffe.ru
Russian Federation, St. Petersburg, 194021
A. V. Bobyl
Ioffe Institute; St. Petersburg State Electrotechnical University “LETI”
Email: nikitin@mail.ioffe.ru
Russian Federation, St. Petersburg, 194021; St. Petersburg, 197376
N. R. Avezova
Physicotechnical Institute, Research-and-Production Association “Physics–Sun”, Uzbekistan Academy of Sciences
Email: nikitin@mail.ioffe.ru
Uzbekistan, Tashkent, 100084
E. I. Terukov
Ioffe Institute
Email: nikitin@mail.ioffe.ru
Russian Federation, St. Petersburg, 194021