At low temperature, ZnSe emits strongly the near-band-edge luminescence consisting of the excitonic emissions and defect-related ones. However, it was observed that these emission lines are strongly fatigued under ultraviolet irradiation. Based on various experiments, we propose a mechanism of photo-induced traps to explain the photoluminescence fatigue phenomenon. These traps are created or enhanced in ZnSe by irradiation of the ultraviolet light with photon energy much above the band gap energy of cubic ZnSe.
|Number of pages||6|
|Journal||Journal of Crystal Growth|
|Publication status||Published - 2000 Jun 2|
|Event||The 9th International Conference on II-VI Compounds - Kyoto, Jpn|
Duration: 1999 Nov 1 → 1999 Nov 5
Bibliographical noteFunding Information:
The authors are grateful to Dr. P.V. Phuc for his help in X-ray diffraction measurement. This work was supported by Vietnam-NCST and National creative Research Initiatives of Ministry of Science and Technology of Korea. NQL thanks the KOSEF for a fellowship.
All Science Journal Classification (ASJC) codes
- Condensed Matter Physics
- Inorganic Chemistry
- Materials Chemistry