Exceeding 19% efficient 6 inch screen printed crystalline silicon solar cells with selective emitter

Eunjoo Lee, Kyeongyeon Cho, Dongjoon Oh, Jimyung Shim, Hyunwoo Lee, Junyoung Choi, Jisun Kim, Jeongeun Shin, Soohong Lee, Haeseok Lee

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

The process conditions for high efficiency industrial crystalline Si solar cells with selective emitter were optimized. In the screen printed solar cells, the sheet resistance must be 50-60Ω/sq. because of metal contact resistance. But the low sheet resistance causes the increase of the recombination and blue response at the short wavelength. Therefore, the screen printed solar cells with homogeneous emitter have limitations of efficiency, and this means that the selective emitter must be used to improve cell efficiency. This work demonstrates the feasibility of a commercially available selective emitter process, based on screen printing and conventional diffusion process. Previous work, we announced about 18.5% efficient selective emitter solar cell by variation of heavy emitter pattern width. Now, we improved cell efficiency from 18.5% to 19% by transition of heavy emitter pattern and shallow emitter doping condition. A maximum cell efficiency of 19.05% is obtained on a 156mm×156mm crystalline silicon solar cell.

Original languageEnglish
Pages (from-to)95-98
Number of pages4
JournalRenewable Energy
Volume42
DOIs
Publication statusPublished - 2012 Jun 1
Externally publishedYes

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Keywords

  • High efficiency
  • Screen printing
  • Selective emitter
  • Silicon solar cell

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment

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