期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 724, 期 -, 页码 735-743出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2017.07.047
关键词
Photoluminescence; Energy transfer; Phosphor; Agricultural lighting
资金
- National Natural Science Foundation of China [51572200, 51102185, U1301242]
- Zhejiang Province [Y16E020041]
- Public Industrial Technology Research Projects of Zhejiang Province [2015C31142]
- Research Fund for the Doctoral Program of Higher Education of China [20130171130001]
- Key Laboratory of Optoelectronic Materials Chemistry and Physics, Chinese Academy of Sciences [2008DP173016]
Bi3+ and Eu3+ co-activated Ca14Al10Zn6O35 (CAZO) phosphors were synthesized by a solid state sintering method. X-ray diffraction (XRD), scan electron microscopy (SEM), photoluminescence (PL) and decay studies were employed to characterize the as-prepared phosphor samples. A dual-emission composed of blue and red luminescence is observed in Bi3+ and Eu3+ co-activated CAZO phosphors, which has potential application in artificial lighting to improve the plant growth. The highest intensities of emissions of CAZO: Bi3+ and CAZO: Bi3+, Eu3+ are obtained at the concentration of Bi3+ at 0.5 mol% and 1.0 mol%, respectively. The overall luminescence color can be tunable from blue, purple, to red by changing the molecular ratio of Bi3+ to Eu3+. The mechanism of energy transfer from Bi3+ to Eu3+ has been demonstrated by decay times of Bi3+ emissions which are varied with Eu3+ content doped in host lattice. The efficiency of energy transfer from Bi3+ to Eu3+ increases with the increase of Eu3+ concentration, which leads to that the internal quantum yields (QY) of both Bi3+ and Eu3+ co-activated CAZO are higher than either of Bi3+ or Eu3+ singly doped phosphor. (C) 2017 Elsevier B.V. All rights reserved.
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