Preparation and luminescent properties of highly transparent Y3Ga5O12:M3+ (M = Dy, Cr) ceramics
Preparation and luminescent properties of highly transparent Y3Ga5O12:M3+ (M = Dy, Cr) ceramics
复制标题
高透明Y3Ga5O12:M3(M=Dy,Cr)陶瓷的制备及发光性能
DOI：
10.1016/j.jeurceramsoc.2019.08.028
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发表时间：
2019-12-01
影响因子：
5.7
通讯作者：
Qin, Haiming
中科院分区：
文献类型：
--
作者：
Hua, Hui;Wang, Xinjia;Qin, Haiming
通过固相反应-两步烧结方法制备了YGG:Dy和YGG:Cr多晶陶瓷。对所制备的透明陶瓷的晶体结构、相演化、形貌和发光性能进行了深入研究。 YGG:Dy和YGG:Cr透明陶瓷在1200 nm处的直线透过率分别可达70.6%和67.3%。对于YGG:Dy透明陶瓷，在353 nm激发下可以观察到以492 nm、581 nm和669 nm为中心的三个发射带。其在紫外线照射下的 CIE 色坐标为 (0.3182, 0.3326)，是 WLED 的有前途的紫外线转换候选者。而YGG:Cr透明陶瓷的发射峰在709 nm左右，可以作为具有优异显色指数的红光LED的候选材料之一。实验结果表明，Y3Ga5O12:M3+ (M = Dy, Cr) 透明陶瓷是有前途的新型 LED 发光材料。
YGG:Dy and YGG:Cr polycrystalline ceramics were prepared via a solid-state reaction-two step sintering approach. The crystalline structure, phase evolution, morphologies and luminescence properties of as prepared transparent ceramics were intensively investigated. In-line transmittance of YGG:Dy and YGG:Cr transparent ceramics can reach up to 70.6% and 67.3% at 1200 nm, respectively. For YGG:Dy transparent ceramic, three emission bands centered at 492 nm, 581 nm and 669 nm can be observed under excitation of 353 nm. Its CIE color coordinate is (0.3182, 0.3326) under UV irradiation, which is a promising UV-converting candidate for WLEDs. While the emission peak of YGG:Cr transparent ceramic is at about 709 nm, which can be one of the candidate materials applied in red-emitting LEDs with excellent color rendering index. The experimental results demonstrate that Y3Ga5O12:M3+ (M = Dy, Cr) transparent ceramics are promising novel luminescent materials for LEDs.