Effect of radiative energy transfer and direct excitation on the up-conversion and down-shifting emission properties of Er3+-doped Zn3(VO4)2
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2021 ◽
Vol 557
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pp. 120580
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1997 ◽
Vol 71
(3)
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pp. 221-228
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1989 ◽
Vol 49
(1)
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pp. 59-64
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