Abstract
To clarify the mechanism of the dip and hump during the photoquenching process observed in the time-dependent piezoelectric photoacoustic (PPA) signal, the PPA spectra were measured by changing the illumination time of the quenching-light of 1.12 eV at 80 K. It was found that a distinctive peak appeared around 1.1 eV and moved to higher photon energy side with increasing the illumination time. A contribution of the deep level that changes the activation energy during the photoquenching process is considered.
Original language | English |
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Pages (from-to) | 255-259 |
Number of pages | 5 |
Journal | Journal of Crystal Growth |
Volume | 210 |
Issue number | 1 |
DOIs | |
Publication status | Published - 2000 Mar 1 |
Event | 8th International Conference on Defects-Recognition, Imaging and Physics in Semiconductors - Narita, Jpn Duration: 1999 Sep 15 → 1999 Sep 18 |
ASJC Scopus subject areas
- Condensed Matter Physics
- Inorganic Chemistry
- Materials Chemistry