Singh, Gajendra and Verma, Amit and Jeyakumar, R.
(2014)
Fabrication of c-Si solar cells using boric acid as a spin-on dopant for back surface field.
RSC Advances, 4 (9).
pp. 4225-4229.
ISSN 2046-2069
Abstract
Cost effective solar cells are paramount for solar power to compete with traditional power generation. Here we present results on two low cost, both side textured c-Si solar cells. One solar cell had an Al back surface field (BSF), while the other had boron BSF fabricated by using spin-on boric acid as a p-type dopant. As compared to the Al-BSF solar cell, an improvement in efficiency of 1.7% was observed for a solar cell with boron BSF. Since boron BSF is stronger than Al-BSF, an improvement in efficiency can be attributed to an increase in long wavelength response, collection efficiency and reduced back surface recombination. The boron BSF solar cell showed an efficiency of 12.9% with V-oc of 0.56 V, J(sc) of 32.2 mA cm(-2) and FF of 0.72. These parameters are expected to significantly increase further with the addition of layers such as anti-reflection/passivation layers at the front side, and back surface passivation with local back surface field, etc.
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