Er-Chien Wang, Sudha Mokkapati, Tom P. White, Thomas Soderstrom, Sergey Varlamov and Kylie R. Catchpole Light trapping with titanium dioxide diffraction gratings fabricated by nanoimprinting Progress in Photovoltaics: Research and Applications 22
In this paper, we present an experimental demonstration of photocurrent enhancement in thin film recrystallised silicon solar cells using TiO2 pillar arrays fabricated on the rear of the cells using nanoimprint lithography. A short circuit current enhancement of 19% is measured experimentally, and excellent agreement with numerical simulations is obtained. We show numerically that by replacing the Ag capping present on the cells with a detached rear Ag back reflector, the enhancement could reach 37%.
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