Pool–Frenkel thermoelectric modulation of exciton photoluminescence in GaSe crystals
Yazarlar (4)
Prof. Dr. Hüseyin ERTAP
Kafkas Üniversitesi, Türkiye
G. M. Mamedov
Kafkas Üniversitesi, Türkiye
M. Karabulut
Kafkas Üniversitesi, Türkiye
A. Bacoglu
Hacettepe Üniversitesi, Türkiye
| Makale Türü | Özgün Makale (SSCI, AHCI, SCI, SCI-Exp dergilerinde yayınlanan tam makale) | ||
| Dergi Adı | Journal of Luminescence (Q2) | ||
| Dergi ISSN | 0022-2313 Wos Dergi Scopus Dergi | ||
| Dergi Tarandığı Indeksler | SCI-Expanded | ||
| Makale Dili | İngilizce | Basım Tarihi | 07-2011 |
| Cilt / Sayı / Sayfa | 131 / 7 / 1376–1379 | DOI | 10.1016/j.jlumin.2011.03.037 |
| Makale Linki | http://dx.doi.org/10.1016/j.jlumin.2011.03.037 | ||
| Özet |
| Effect of external field on the exciton photoluminescence of GaSe crystals has been investigated and it has been observed that the PL is quenched with the applied field. The changes observed in the PL spectra have been analyzed with impact exciton, FranzKeldysh and PoolFrenkel effects. From the analyses of the experimental data, it has been found that the intensity of direct free, indirect free and bound exciton peaks decreased exponentially with the square root of applied field as I∼expβ√E. The energy positions of emission peaks were found to shift to longer wavelength with the applied field as ΔE∼β√E. From these findings, the PoolFrenkel thermoelectric field effect is seen to be the dominant mechanism in the variation of exciton PL with the applied field even though the impact exciton and FranzKeldysh effects contribute. © 2011 Elsevier B.V. All rights reserved. |
| Anahtar Kelimeler |
| GaSe | Bridgman | Exciton photoluminescence | Pool-Frenkel |