Low-temperature steady-state photoconductivity in amorphous selenium films

N. Qamhieh, M. L. Benkhedir, M. Brinza, G. J. Adriaenssens

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)


Steady-state photocurrents are measured in amorphous selenium (a-Se) films as function of illumination intensity for temperatures between 210 K and 297 K. The Lux-Ampère characteristic, Iph ∝ Gy, shows a maximum exponent of 1.08 ± 0.06 around 250 K while lower values are measured at room temperature and 210 K. The photocurrent overshoots its steady-state value upon initial turn-on of a high light intensity by an amount that has a minimum in the 250 K region. Both phenomena indicate the presence of a deep electron trap near the a-Se equilibrium Fermi level.

Original languageEnglish
Pages (from-to)1781-1784
Number of pages4
JournalJournal of Optoelectronics and Advanced Materials
Issue number4
Publication statusPublished - Aug 2005


  • Lux-Ampère characteristic
  • Photoconductivity
  • Selenium

ASJC Scopus subject areas

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


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