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• W2022743953 endingPage "9857" @default.
• W2022743953 startingPage "9850" @default.
• W2022743953 abstract "We report on the mechanism of photoemission from Bi3+-related centers in ScVO4. In this material, an unusually strong red photoluminescence was recently observed and was related to hypothetic interactions between oxygen vacancies and Bi3+ species, denoted as oxygen vacancy perturbation. Here, we provide further experimental evidence for the existence of an interrelation between the availability of oxygen and the blue-shift of Bi3+ photoluminescence. For this, the effect of preparation conditions and the temperature-dependence of the spectroscopic properties of ScVO4:Bi3+ are studied. Under a reducing atmosphere, as a result of vanadate reduction from V5+ to V3+, a structural change occurs at high temperature from ScVO4 to ScVO3. However, this transition is avoided through mild treatment for short times. Then, instead of a crystallographic change, different types of defects, which assumedly partition in the vicinity of the Bi3+ dopants, could be locally generated at the expense of oxygen vacancies. As a result, Bi3+ luminescence occurs at higher energy. Similar but considerably smaller blue-shift is confirmed due to thermal inversion from 3P0 to 3P1 because the Bi3+ photoluminescence was measured at elevated temperature. On the basis of these results, we believe that the careful engineering of the local defect environment around Bi3+ and the distribution between the excited states of 3P0 and 3P1 can tailor the spectral properties of future Bi3+-based phosphor materials." @default.
• W2022743953 created "2016-06-24" @default.
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• W2022743953 date "2014-10-02" @default.
• W2022743953 modified "2023-09-27" @default.
• W2022743953 title "Processing-dependence and the nature of the blue-shift of Bi³⁺-related photoemission in ScVO₄at elevated temperatures" @default.
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• W2022743953 doi "https://doi.org/10.1039/c4tc01623h" @default.
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