Influence of synthetic temperature and heating time on the luminescence behavior of M sub(5)(PO sub(4)) sub(3) Cl:Eu super(2+), Mn super(2+) (M=Ca, Sr) phosphors

To further understand the energy loss mechanism of the "charge transfer process" that was proposed in our previous work on Eu super(2+)-Mn super(2+) co-doped phosphors, the influence of synthetic temperature and heating time on the photoluminescence (PL) behavior of M sub(5)(PO sub(4)) sub...

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Bibliographic Details
Published in:Journal of rare earths 2015-11, Vol.33 (11), p.1129-1136
Main Authors: Yang, Fengli, An, Wei, Li, Hongyan, Hu, Yunsheng, Xu, Huibing, Ye, Xinyu, Zhuang, Weidong, Jing, Xiping
Format: Article
Language:English
Subjects:
Blocking
Charge transfer
Clusters
Heating
Luminescence
Phosphors
Rare earth metals
Spectra
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Summary:To further understand the energy loss mechanism of the "charge transfer process" that was proposed in our previous work on Eu super(2+)-Mn super(2+) co-doped phosphors, the influence of synthetic temperature and heating time on the photoluminescence (PL) behavior of M sub(5)(PO sub(4)) sub(3) Cl:Eu super(2+), Mn super(2+) (M=Ca, Sr) phosphors was investigated by analyzing their PL spectra and decay curves. For the Ca phase, an increase in the synthetic temperature resulted in an increase in the loss from the "charge transfer process" since more Eu super(2+) ions were involved in the Eu super(2+)-Mn super(2+) clusters. This was contrary to the thermodynamic expectation. To solve this contradiction, we proposed that the formation of Eu super(2+)-Mn super(2+) clusters was kinetically blocked at lower synthetic temperatures. With an increase in heating time for the phosphors synthesized at lower temperature (such as 1100 [degrees]C) the PL intensity decreased, which supported the above assertion.
ISSN:1002-0721
DOI:10.1016/S1002-0721(14)60536-6