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- W2949221569 abstract "A series of rare-earth zirconate RE2Zr2O7 nanocrystals (RE = La, Nd, Eu and Y) were prepared by a simple combustion method. These compounds possess either a pyrochlore structure (P-RE2Zr2O7) or a defect fluorite structure (F-RE2Zr2O7), which depends on the ionic radius of RE3+. The photoluminescence (PL) property of the as-prepared RE2Zr2O7 nanocrystals was studied, and the observed emissions in the UV and visible range were attributed to different transition mechanisms for RE2Zr2O7 with different RE ion. A PL mechanism has been proposed, associated with the transition between the valence band and a mid-gap state related to oxygen vacancies. Divalent Pb ions were introduced into RE2Zr2O7 nanocrystals and the luminescence of the Pb2+-doped samples was also recorded for comparison. The PL property of RE2Zr2O7 was found to be intimately related to their intrinsic defect structure, and PL was thought as a new method to estimate the degree of disorder in the A2B2O7 structure (from pyrochlore structure to defect fluorite structure)." @default.
- W2949221569 created "2019-06-27" @default.
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- W2949221569 date "2008-01-01" @default.
- W2949221569 modified "2023-10-17" @default.
- W2949221569 title "Systematic research on RE2Zr2O7 (RE=La, Nd, Eu and Y) nanocrystals: Preparation, structure and photoluminescence characterization" @default.
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- W2949221569 doi "https://doi.org/10.1016/j.solidstatesciences.2007.07.037" @default.
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