Electronic structure and photoluminescence properties of Ca2GeO4 ∶Eu3+ in ultraviolet and vacuum ultraviolet region | Zendy

Qingsong Qin | Zendy; Minghui Yu | Zendy; Zhou Hong-Liang | Zendy; Meijiao Zhou | Zendy; Xiang Xiao-Tian | Zendy; Xiaodi Li | Zendy; Zeng Jun-Xi | Zendy; Zhang Jiachi | Zendy

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Electronic structure and photoluminescence properties of Ca2GeO4 ∶Eu3+ in ultraviolet and vacuum ultraviolet region

Author(s) -

Qingsong Qin,

Minghui Yu,

Zhou Hong-Liang,

Meijiao Zhou,

Xiang Xiao-Tian,

Xiaodi Li,

Zeng Jun-Xi,

Zhang Jiachi

Publication year - 2011

Publication title -

acta physica sinica

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.199

H-Index - 47

ISSN - 1000-3290

DOI - 10.7498/aps.60.067802

Subject(s) - photoluminescence , phosphor , ultraviolet , excited state , materials science , density functional theory , vacuum ultraviolet , optoelectronics , excitation , photoluminescence excitation , ion , diode , ultraviolet light , atomic physics , molecular physics , physics , chemistry , computational chemistry , quantum mechanics

Red emitting Ca2GeO4 ∶Eu3+ phosphors are synthesized by solid state method. The ultraviolet and vacuum ultraviolet excited photoluminescence properties are investigated in detail. The phenomenon of reduction of Eu3+ ions in air and the color switches are discovered and explained. The Ca2GeO4 ∶Eu3+ presents intense excitation intensities at 163—230, 301 and 466 nm, showing the potential applications in plasma display panels and light emitting diodes. The excitation spectra are studied to identify the photoluminescence mechanism of Ca2GeO4 ∶Eu3+ . First principles calculation within the local density approximation of the density functional theory is used to calculate the electronic structure and the linear optical properties of Ca2GeO4.

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