Journal
OPTICAL MATERIALS
Volume 97, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.optmat.2019.109384
Keywords
Florescent materials; Composite ceramics; Al2O3-Ce:Tb3Al5O12; White light illumination
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Funding
- International Partnership Program of Chinese Academy of Sciences [181231KYSB20160005]
- National Key R&D Program of China [2017YFB0403700]
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Al2O3-Ce:Tb3Al5O12(TAG) composite ceramics have been synthesized by solid-state vacuum sintering for the application of high efficiency warm white light illumination. The microstructures and fluorescent properties were investigated systematically. Through the introduction of Al2O3 particles, the luminous efficiency (LE) of Ce:TAG ceramics based LED can be largely promoted by similar to 40%. When the molar ratio of Al2O3/Ce:TAG is 0.4, the photoelectric properties can be modified by the scattering from both Al2O3 and residual pores. Moreover, a high color-rendering index(CRI) of 63 and a low color correlated temperature(CCT) of 3580 K can also be obtained at the same time. The results indicate that Al2O3-Ce:TAG composite ceramics are very promising candidates for the application of high-quality white-lighting.
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