PL EN


Preferences help
enabled [disable] Abstract
Number of results
2006 | 110 | 2 | 211-217
Article title

Multiband GaN/AlGaN UV Photodetector

Content
Title variants
Languages of publication
EN
Abstracts
EN
We present optical and electrical measurements made on GaN/AlGaN photodetector structure capable to detect three UV ranges, tuned by external voltage. The highest band at energy of about 3.85 eV is nearly independent of bias applied to the Schottky contact. Photosensitivity of the second band at about 3.65 eV changes strongly with the bias. Signal in this range increases about 20 times when the bias changes from 0 V to -4 V. Photosensitivity of the third band (3.4 eV) appears for strong reverse bias (-3 V). Characteristics of the detector are in qualitative agreement with numerical model, however deep centers present in the AlGaN layers cause quantitative discrepancies. The concentration of defects of the order of 10^{16} cm^{-3} was estimated from current transients.
Keywords
EN
Year
Volume
110
Issue
2
Pages
211-217
Physical description
Dates
published
2006-08
received
2006-06-17
References
  • 1. F. Bernardini, V. Fiorentini, D. Vanderbilt, Phys. Rev. B, 56, R10024, 1997
  • 2. A. Drabińska, K.P. Korona, R. Bozek, J.M. Baranowski, K. Pakula, T. Tomaszewicz, Phys. Status Solidi C, 0, 329, 2003
  • 3. D. Jena, S. Heikman, J.S. Speck, A. Gossard, U.K. Mishra, A. Link, O. Ambacher, Phys. Rev. B, 67, 153306, 2003
  • 4. J. Hwang, M.H. Song, B. Park, S. Nishimura, T. Toyooka, J.W. Wu, Y. Takanishi, K. Ishikawa, H. Takezoe, Nature Mater., 4, 383, 2005
  • 5. K.P. Korona, A. Drabińska, A. Trajnerowicz, R. Bozek, K. Pakula, J.M. Baranowski, Acta Phys. Pol. A, 103, 675, 2003
  • 6. D.E. Aspnes, A.A. Studna, Phys. Rev. B, 7, 4605, 1973
  • 7. A. Drabińska, K.P. Korona, K. Pakula, J.M. Baranowski, submitted to Phys. Status Solidi A
Document Type
Publication order reference
YADDA identifier
bwmeta1.element.bwnjournal-article-appv110n214kz
Identifiers
JavaScript is turned off in your web browser. Turn it on to take full advantage of this site, then refresh the page.