Investigation of photoelectrochemical etching of textured silicon in solar cells

  • Jinchuan You
  • , Jing Shi
  • , Bobo Peng
  • , Lianwei Wang*
  • , Paul K. Chu
  • *Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Light trapping is an important method to increase the efficiency of solar cells. In this work, we study the combined effects of photoelectrochemical etching and texturing to enhance light trapping. Porous silicon (PSi) as an antireflection coating is fabricated on the surface of a textured silicon layer by photoelectrochemical etching. The effects of different electrochemical conditions such as acidic solutions, illumination, current densities, and etching time on the solar cell parameters and surface reflectance from the silicon are evaluated. Our results indicate that the average reflectance of the surface is lower when electrochemical etching is combined with texturing and the PSi thus formed can serve as an antireflection layer in single-crystal silicon solar cells. Our SEM results acquired from samples prepared under different conditions show that the morphology of the textured surface can be improved by electrochemical etching.

Original languageEnglish
Title of host publicationPhotonics and Optoelectronics Meetings (POEM) 2009 - Solar Cells, Solid State Lighting, and Information Display Technologies
DOIs
StatePublished - 2009
EventPhotonics and Optoelectronics Meetings (POEM) 2009 - Solar Cells, Solid State Lighting, and Information Display Technologies - Wuhan, China
Duration: 8 Aug 200910 Aug 2009

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume7518
ISSN (Print)0277-786X

Conference

ConferencePhotonics and Optoelectronics Meetings (POEM) 2009 - Solar Cells, Solid State Lighting, and Information Display Technologies
Country/TerritoryChina
CityWuhan
Period8/08/0910/08/09

Keywords

  • PSi
  • Photoelectrochemical etching
  • Solar cell
  • Surface antireflection coating (ARC)
  • Texturing

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