Effect of Silicon Surface for Perovskite/Silicon Tandem Solar Cells: Flat or Textured?


KANDA H., Shibayama N., ÜZÜM A. , Umeyama T., Imahori H., Ibi K., ...More

ACS APPLIED MATERIALS & INTERFACES, vol.10, no.41, pp.35016-35024, 2018 (Journal Indexed in SCI) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 10 Issue: 41
  • Publication Date: 2018
  • Doi Number: 10.1021/acsami.8b08701
  • Title of Journal : ACS APPLIED MATERIALS & INTERFACES
  • Page Numbers: pp.35016-35024

Abstract

Perovskite and textured silicon solar cells were integrated into a tandem solar cell through a stacking method. To consider the effective structure of silicon solar cells for perovskite/silicon tandem solar cells, the optic and photovoltaic properties of textured and flat silicon surfaces were compared using mechanical-stacking-tandem of two- and four-terminal structures by perovskite layers on crystal silicon wafers. The reflectance of the texture silicon surface in the range of 750-1050 nm could be reduced more than that of the flat silicon surface (from 2.7 to 0.8%), which resulted in increases in average incident photon to current conversion efficiency values (from 83.0 to 88.0%) and current density (from 13.7 to 14.8 mA/cm(2)). Using the texture surface of silicon heterojunction (SHJ) solar cells, the significant conversion efficiency of 21.4% was achieved by four-terminal device, which was an increase of 2.4% from that of SHJ solar cells alone.