Scanning laser-beam-induced current measurements of lateral transport near-junction defects in silicon heterojunction solar cells

Michael G. Deceglie, Hal S. Emmer, Zachary C. Holman, Antoine Descoeudres, Stefaan De Wolf, Christophe Ballif, Harry A. Atwater

Research output: Contribution to journalArticle

4 Scopus citations

Abstract

We report the results of scanning laser-beam-induced current (LBIC) measurements on silicon heterojunction solar cells that indicate the length scale over which photogenerated carriers are sensitive to local defects at the amorphous silicon/crystalline silicon heterojunction interface. The defects were intentionally created with focused ion beam irradiation, enabling us to study how defects at a predefined and known location affect carrier collection and transport in neighboring regions where the device remains pristine. The characteristic length scale over which carriers in the pristine areas of the device are vulnerable to loss via recombination in the adjacent defective region increases to over 50 μm as the device is forward biased. For photocarriers generated near the amorphous-crystalline interface, LBIC measurements suggest that lateral transport in the near-junction inversion layer in the c-Si is an important transport mechanism.

Original languageEnglish (US)
Article number6670680
Pages (from-to)154-159
Number of pages6
JournalIEEE Journal of Photovoltaics
Volume4
Issue number1
DOIs
StatePublished - Jan 1 2014
Externally publishedYes

Keywords

  • Carrier transport
  • device physics
  • heterojunction with intrinsic thin layer (HIT)
  • laser-beam-induced current (LBIC)
  • silicon heterojunction (SHJ)

ASJC Scopus subject areas

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

Fingerprint Dive into the research topics of 'Scanning laser-beam-induced current measurements of lateral transport near-junction defects in silicon heterojunction solar cells'. Together they form a unique fingerprint.

  • Cite this