Improved LDSE processing for the avoidance of overplating yielding 19.2% efficiency on commercial grade crystalline Si solar cell

Eunjoo Lee, Hyunwoo Lee, Junyoung Choi, Dongjun Oh, Jimyung Shim, Kyungyeun Cho, Jisun Kim, Soohong Lee, Brett Hallam, Stuart R. Wenham, Haeseok Lee

Research output: Contribution to journalArticle

35 Citations (Scopus)

Abstract

A record in laser doped selective emitter (LDSE) solar cells with an efficiency η=19.2% is reported. In this study, we investigate the effect of SiNx films for laser doped selective emitter solar cells with plated front contacts. It is observed that the condition of processes such as silicon nitride and laser doping (LD) is of critical importance prior to light induced plating. If these processes are not performed optimally, localized shunts may form during the light induced plating (LIP) process that then inhibit plating in the surrounding areas. In the previous work an efficiency of 18.3% has been achieved, even though the fill factor was only 74.2% and the cell suffered from additional shunting and shading losses due to overplating. However, in this work, we demonstrate that with the optimization of the PECVD SiNx and metallization processes, cells have reached efficiencies of more than 19% on commercial grade p-type CZ Si substrates.

Original languageEnglish
Pages (from-to)3592-3595
Number of pages4
JournalSolar Energy Materials and Solar Cells
Volume95
Issue number12
DOIs
Publication statusPublished - 2011 Dec
Externally publishedYes

Keywords

  • Laser doping
  • Plating
  • Selective emitter
  • Silicon
  • Solar cell

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Renewable Energy, Sustainability and the Environment
  • Surfaces, Coatings and Films

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