We show that an electrically soft ferroelectric host can be used to tune the photoluminescence (PL) response of rare-earth emitter ions by external electric field. The proof of this concept is demonstrated by changing the PL response of the Eu³⁺ ion by electric field on a model system Eu-doped 0.94(Na1/2Bi1/2TiO₃)-0.06(BaTiO₃). We also show that new channels of radiative transitions, forbidden otherwise, open up due to positional disorder in the system, which can as well be tuned by electric field.
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Khatua et al. (2016) studied this question.
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