期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 785, 期 -, 页码 169-177出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2019.01.155
关键词
Bismuth oxy chloride; Sm3+ ion; Phosphors; Photo-luminescent; Color purity
资金
- Council of Scientific and Industrial Research (CSIR), New Delhi, India
We report, synthesis of orange red light emitting Sm3+ activated BiOCl phosphors at relatively low temperature (400 degrees C) and shorter duration of 1 h. Rietveld refined results confirmed that all the compounds crystallized in the tetragonal structure with space group P4/nmm (No. 129). Functional group analysis were carried out by Fourier transform infrared (FT-IR) and Raman spectroscopy. The Photoluminescent (PL) experiment results reveal that, an intense PL transition at 598 nm ((4)G(5/2) -> H-6(7/2)) corresponds to orange red emission at lambda(ex) = 408 nm. The maximum emission intensity was observed for BiOCl: Sm3+ (3 mol%) phosphor, above this concentration quenching takes place due to charge exchange with neighboring Sm3+ ions. Time resolved fluorescence spectroscopic result reveals that, the decay curve is bi-exponential in nature and having long lifetime (tau = 0.58 ms). The obtained CIE and CCT values suggest that these phosphors having excellent color purity (similar to 90%) and low correlated color temperature. These results suggest that, Sm3+ activated BiOCl can be a potential red phosphor materials for WLEDs and other optoelectronics applications. (C) 2019 Elsevier B.V. All rights reserved.
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