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Abstract: Following the recent surge of interest in n-doped strontium titanate as apossible blue light emitter, a time-resolved photoluminescence analysis wasperformed on nominally pure, Nb-doped and oxygen-deficient single-crystalSrTiO3 samples. The doping-effects on both the electronic states involved inthe transition and the decay mechanism are respectively analyzed by comparingthe spectral and dynamic features and the yields of the emission. Ourtime-resolved analysis, besides shedding some light on the basic recombinationmechanisms acting in these materials, sets the intrinsic bandwidth limit of theproposed blue light emitting optoelectronic devices made of Ti-basedperovskites heterostructures in the GHz range.



Author: A. Rubano, D. Paparo, M. Radovic, A. Sambri, F. Miletto Granozio, U. Scotti di Uccio, L. Marrucci

Source: https://arxiv.org/



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