Experimental study of design parameters in silicon micropillar array solar cells produced by soft lithography and metal-assisted chemical etching

Jae Cheol Shin, Debashis Chanda, Winston Chern, Ki Jun Yu, John A. Rogers, Xiuling Li

Research output: Contribution to journalArticle

39 Citations (Scopus)

Abstract

Solar cells, consisting of core-shell p-n junction silicon micropillars on a thin membrane fabricated using soft lithography and metal-assisted chemical etching, are studied as a function of geometrical designs. Significant enhancement in absorption rate is found without much dependence on the pillar diameters in the range of 0.5-2 μm. However, the short-circuit current increases continuously with diameter, which is inversely proportional to the total surface area for a fixed diameter/pitch pillar array. This study provides unambiguous evidence that surface recombination is the dominant loss mechanism in nanowire- or micropillar-based solar cells.

Original languageEnglish
Article number6140534
Pages (from-to)129-133
Number of pages5
JournalIEEE Journal of Photovoltaics
Volume2
Issue number2
DOIs
Publication statusPublished - 2012 Jan 27

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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