Enhanced red emission of CaMoO 4 :Eu 3+  phosphor by structural adjustment for white light‐emitting diodes application | Zendy

Zhang Zhan Hui | Zendy; Huang Qiang | Zendy; Zhao Xu | Zendy; Huang Zhi Liang | Zendy

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Enhanced red emission of CaMoO 4 :Eu 3+ phosphor by structural adjustment for white light‐emitting diodes application

Author(s) -

Zhang Zhan Hui,

Huang Qiang,

Zhao Xu,

Huang Zhi Liang

Publication year - 2009

Publication title -

physica status solidi (a)

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.532

H-Index - 104

eISSN - 1862-6319

pISSN - 1862-6300

DOI - 10.1002/pssa.200925086

Subject(s) - phosphor , luminescence , emission intensity , light emitting diode , materials science , analytical chemistry (journal) , diode , crystal structure , chemistry , optoelectronics , crystallography , chromatography

Na + was incorporated into red‐emitting CaMoO 4 :Eu 3+ phosphor to form solid solutions and reduce the crystal symmetry. For a fixed Eu 3+ concentration, the luminescent properties as a function of Na + concentrations were systematically studied under near‐ultraviolet (UV) excitation. Enhanced red emission at 613 nm was observed and the strongest intensity was 4.5 times that of the sample without Na + . Differing from the charge‐compensation mechanism, this enhancement was related to the structural distortion and decreasing centrosymmetry. The increased ratios of red emission ( 5 D 0 → 7 F 2 ) to orange ( 5 D 0 → 7 F 1 ) in intensity revealed that the structural adjustment was achieved in the phosphors via the incorporation of Na + .

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