Investigation of Al back contacts and BSF formation by in situ TEM for silicon solar cells

Sungeun Park, Jooyoung Song, Sung Ju Tark, Young Do Kim, Chel Jong Choi, Soonwoo Kwon, Sewang Yoon, Chang Sik Son, Donghwan Kim

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Back contacts for Si solar cells made by Al evaporation and screen printing Al paste were studied by transmission electron microscopy. Si was found to diffuse into the Al during heating. Si diffusion formed vacancies in the Si wafer and Al could then penetrate the Si wafer in spiked formations. The Al spikes retracted during cooling, leaving a doped back surface field region.

Original languageEnglish
Pages (from-to)863-869
Number of pages7
JournalProgress in Photovoltaics: Research and Applications
Volume22
Issue number8
DOIs
Publication statusPublished - 2014 Jan 1

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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