High efficiency AZO-InP nanopillar-based heterojunction solar cells

Seokhun Yun, Young Hun Paik, Sung Jin Kim, Doo Gun Kim, Taeksoo Ji, Jae Cheol Shin

Research output: Contribution to journalArticlepeer-review

10 Scopus citations


This paper reports heterojunction solar cells consisting of InP nanopillars and aluminum-doped zinc oxide (AZO). The AZO layer sputtered on an InP surface is used not only as a transparent electrode, but also as an excellent rectifying junction with InP. More importantly, the wide-bandgap-AZO functions as a window layer of solar cells, thereby suppressing carrier recombination loss at the AZO-InP heterointerface. The InP nanopillar array reduces the light reflectance and increases the optical path length of the solar cells. The AZO-InP nanopillar-based heterojunction solar cells exhibited an open-circuit voltage, short-circuit current density, fill-factor, and power-conversion efficiency of 0.68 V, 36.8 mA/cm2, 68%, and 17.1%, respectively, under air-mass 1.5 simulated solar illumination (100 mW/cm2).

Original languageEnglish (US)
Pages (from-to)726-730
Number of pages5
JournalCurrent Applied Physics
Issue number7
StatePublished - Jul 1 2016


  • AZO
  • Heterojunction
  • InP
  • Nanostructure
  • Solar cells

ASJC Scopus subject areas

  • Materials Science(all)
  • Physics and Astronomy(all)


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