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Excitation spectra of self-activated luminescence in ZnSe crystals under pressure |
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| Authors: | P. Jaszczyn-Kopec B. Canny G. Syfosse G. Hamel |
| Affiliation: | Laboratoire de Luminescence, Université Pierre et Marie Curie, Tour 13, 4 place Jussieu, 75230 Paris Cedex 05, France;Départment des Hautes Pressions, Université Pierre et Marie Curie, Tour 22, 4 place Jussieu, 75230 Paris Cedex 05, France |
| Abstract: | A narrow excitation band observed for S-A luminescence in ZnSe crystal is attributed to free exciton absorption. Some overlap with a higher characteristic band of low intensity is considered for low temperature spectra.This band shifts under pressure toward higher energies with a coefficient dE/dP = (7.5±0.3) meV Kb-1 at 300 K and (7.4±0.5) meV Kb-1 at 85 K.The pressure shift of the excitation due to edge absorption is (7.0± 0.5) meV Kb-1. |
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