Enhanced upconversion emissions in Er3+ doped perovskite BaTiO3 glass-ceramics via electric-stimulated polarization technique

International audienceIn this work, Er3+ doped ferroelectric glass ceramics containing high-content BaTiO3 nanoperovskite have been prepared successfully. Optical behaviors with structural dependence indicate that the perturbation of ligand field by tunable thermal condition in glass-ceramics is beneficial to boost upconversion efficiency, that is, the emission intensity possesses multifold improvement in both green band (2H11/2, 4S3/2 → 4I15/2) and red band (4F9/2 → 4I15/2). And adding voltage to stimulate polarization reversal of ferroelectric domains has been investigated as a physical mode to broaden luminescence emissions in visible range. Compared with the unpolarized glass-ceramics, over 1.5 folds higher luminescence intensity can be obtained by polarizing the samples. The multiple mechanisms to achieve upconversion enhancement in ferroelectric materials will stimulate and expand the use of innovative optoelectronic devices