Synthesis, Structure, and Photoluminescence Properties of Ce3+-Doped Ca2YZr2Al3O12: A Novel Garnet Phosphor for White LEDs

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• 作者：Xicheng Wang ; Yuhua Wang
• 刊名：Journal of Physical Chemistry C
• 出版年：2015
• 出版时间：July 16, 2015
• 年：2015
• 卷：119
• 期：28
• 页码：16208-16214
• 全文大小：474K
• ISSN：1932-7455

文摘

A novel garnet phosphor Ca₂YZr₂Al₃O₁₂:Ce³⁺ (CYZA:Ce³⁺) has been successfully designed and synthesized via the solid state method. The crystal structure, morphology, as well as their photoluminescence properties were investigated in detail. Under near-ultraviolet (n-UV) excitation, CYZA:Ce³⁺ exhibits cyan to green emission with the maxima from 484 to 503 nm when varying the Ce³⁺ concentration. The internal quantum efficiency of the optimal sample is 56%. The concentration quenching of Ce³⁺ emission occurs via the energy transfer among the nearest-neighbor ions. The thermal stability is superior compared with the Ba₂SiO₄:Eu²⁺ commercial phosphor. These results suggest that CYZA:Ce³⁺ can be considered as a potential candidate for white LEDs.