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Ca 5 Ga 6 O 14 :Eu 3+ : A novel phosphor with outstanding heat resistance for white light‐emitting diodes
Author(s) -
Liu Zhicong,
Shen Chenyang,
Yuan Lin,
Chen Ya,
Shen Linli,
He Meilin,
Yuan Rongrong,
Liang Xiaojuan,
Liu Jianping,
Xiang Weidong
Publication year - 2019
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.16352
Subject(s) - phosphor , light emitting diode , doping , excitation , analytical chemistry (journal) , luminescence , emission spectrum , diode , materials science , thermal stability , optoelectronics , europium , spectral line , chemistry , physics , organic chemistry , chromatography , quantum mechanics , astronomy
A novel red‐emitting phosphor Ca 5 Ga 6 O 14 :Eu 3+ has been synthesized using solid‐state method. The excitation and emission spectra show that the phosphor can emit the red light with the main peak at 611 nm under excitation of the 280 and 393 nm UV chip and the optimal Eu 3+ concentration is determined to be x = 0.07. Analysis of emission spectrum shows that Eu 3+ occupy the center of noninversion symmetry. With the increase of Eu 3+ doping concentration, the decay time is prolonged due to deeper energy trap arising from nonequivalent substitution. Additionally, the measured thermal stability with 0.539 eV activation energy and calculated 90.5% color purity of optimal phosphor indicate that the phosphor has an enormous application potential in w‐LEDs industry.