Double-side textured liquid phase crystallized silicon thin-film solar cells on imprinted glass

作者：Becker C^*; Preidel V; Amkreutz D; Haschke J; Rech B

来源：Solar Energy Materials and Solar Cells, 2015, 135: 2-7.

DOI：10.1016/j.solmat.2014.08.031

• Crystalline silicon thin-film solar cell
• Liquid phase crystallization
• Light trapping
• Nanoimprint lithography

Emerging liquid phase crystallization (LPC) techniques recently rendered a possible substantial progress in the fabrication of high quality crystalline silicon thin-film solar cells on glass. The implementation of an efficient light trapping texture into such LPC silicon devices is still challenging as an excellent bulk material quality and well-passivated interfaces have to be guaranteed. In this paper we present recent advances in light management for LPC silicon thin-film solar cells on imprinted glasses. A double-sided 2 mu m periodic texture is realized by sandwiching the silicon film during the electron-beam induced crystallization process between an imprinted glass substrate coated with silicon oxide and a silicon oxide capping layer. Amorphous-crystalline silicon (a-Si:H/c-Si) heterojunction solar cells with single sided contacting scheme are fabricated. Textured prototype devices and simultaneously processed planar solar cells exhibit a comparable electronic material quality featuring open circuit voltages above 550 mV and efficiencies up to 8.1%. Optical absorption properties of 10 mu m thick double-side textured silicon films even predict maximum achievable short circuit current densities in solar cells up to 38 mA/cm(2) assuming zero parasitic absorption.

• 出版日期2015-4