Periodic and Random Substrate Textures for Liquid-Phase Crystallized Silicon Thin-Film Solar Cells

Grit Koppel, Daniel Amkreutz, Paul Sonntag, Guangtao Yang, Rene Van Swaaij, Olindo Isabella, Miro Zeman, Bernd Rech, Christiane Becker

Research output: Contribution to journalArticleScientificpeer-review

10 Citations (Scopus)

Abstract

A major limitation in current liquid-phase crystallized (LPC) silicon thin-film record solar cells is optical losses caused by their planar glass-silicon interface. In this study, silicon is grown on nanoimprinted periodically, as well as randomly textured glass substrates, and successfully implemented into state-of-the-art LPC silicon thin-film solar cells. Compared with an optimized planar reference device, both textures enhance absorption of light. Interlayer and process optimization allowed achieving a material quality comparable with the planar reference device. On the random texture, an open-circuit voltage above 630 mV was obtained, as well as an external quantum efficiency exceeding the planar reference device by +3 mA/cm2.
Original languageEnglish
Pages (from-to)85-90
Number of pages6
JournalIEEE Journal of Photovoltaics
Volume7
Issue number1
DOIs
Publication statusPublished - 2017

Keywords

  • Absorption enhancement
  • light management
  • silicon
  • thin-film solar cells

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