Publications Repository - Helmholtz-Zentrum Dresden-Rossendorf
1 PublicationEnhanced blue-violet emission by inverse energy transfer to the Ge-related oxygen deficiency centers via Er3+ ions in metal-oxide semiconductor structures
Kanjilal, A.; Rebohle, L.; Voelskow, M.; Skorupa, W.; Helm, M.
Abstract
It is generally believed that the 1.5 um Er luminescence is enhanced by transferring energy from Si nanocrystals to the nearest Er3+ ions in Er-doped Si-rich SiO2 layers during optical pumping. Here, the influence of Ge nanocrystals instead of excess Si in the same environment is studied using electroluminescence technique on metal-oxide-semiconductor structures. An increase of the 400 nm electroluminescence intensity with a concomitant reduction of the Er-related emission is observed. This is explained in the light of an inverse energy transfer process from Er3+ to the Ge-related oxygen-deficiency centers.
Keywords: EL; Er; Ge; Nanocrystals; MOS
-
Applied Physics Letters 94(2009), 051903-1-051903-3
DOI: 10.1063/1.3077169
Cited 26 times in Scopus
Permalink: https://www.hzdr.de/publications/Publ-12478