Amorphous Silicon/Crystalline Silicon Heterojunction Solar Cells

Christophe Ballif, Stefaan De Wolf, Antoine Descoeudres, Zachary Holman

Research output: Contribution to journalArticlepeer-review

25 Scopus citations


Silicon heterojunction solar cells are crystalline silicon-based devices in which thin amorphous silicon layers deposited on the wafer surfaces serve as passivated, carrier-selective contacts. The success of this technology is attributable to the ability of amorphous silicon to passivate dangling bonds-thereby removing surface recombination sites-without blocking charge carrier transport. This unique combination allows the recombination-active metal contacts to be displaced from the wafer surfaces, enabling record-high open-circuit voltages of up to 750. mV and efficiencies of up to 25.6%. This chapter introduces the silicon heterojunction concept and discusses device fabrication, operation, and manufacturing. Active areas of research and likely future developments are identified throughout.

Original languageEnglish (US)
Pages (from-to)73-120
Number of pages48
JournalSemiconductors and Semimetals
StatePublished - 2014


  • Amorphous silicon
  • Heterojunction
  • Photovoltaics
  • Silicon
  • Solar cell
  • Transparent conductive oxide

ASJC Scopus subject areas

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


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