Tunable full-color-emitting La0.827Al11.9O19.09:Eu2+,Mn2+ phosphor for application to warm white-light-emitting diodes
Tunable full-color-emitting La0.827Al11.9O19.09:Eu2+,Mn2+ phosphor for application to warm white-light-emitting diodes
复制标题
DOI：
10.1063/1.2398887
复制
发表时间：
2006-12
影响因子：
4
通讯作者：
Y. Won;H. S. Jang;W. Im;D. Jeon;Jeong Soo Lee
中科院分区：
文献类型：
--
作者：
Y. Won;H. S. Jang;W. Im;D. Jeon;Jeong Soo Lee
La0.827Al11.9O19.09 Eu ~（2+）、Mn ~（2+）在紫外光激发下，出现三个发射带.蓝光发射源于Eu 2+，而绿色和红光发射都源于Mn 2+。从Eu ~（2+）→ Mn ~（2+）和Mn ~（2+）（四面体）→ Mn ~（2+）（八面体）的能量转移解释了发光机理。这种能量转移通过作为能量供体的蓝色和绿色发射的更快衰减时间来证实。La0.827Al11.9O19.09：Eu 2+，Mn 2+的发射颜色可以通过Mn 2+含量的变化从蓝色轻松定制为红色。通过紫外发光二极管（λpeak= 385 nm）与La0.827Al11.9O19.09：Eu ~（2+），Mn ~（2+）的组合制备的白光发光二极管显示温暖的白色光（Tc= 3559 K）。
La0.827Al11.9O19.09:Eu2+,Mn2+ showed three emission bands when excited by ultraviolet light. A blue emission originates from Eu2+, whereas both green and red emissions originate from Mn2+. The luminescent mechanism is explained invoking the energy transfer of Eu2+→Mn2+ and Mn2+(tetrahedralsite)→Mn2+(octahedralsite). This energy transfer was confirmed by faster decay times of the blue and green emissions as energy donors. The emitted color of La0.827Al11.9O19.09:Eu2+,Mn2+ can be easily tailored from blue to red through variations of the Mn2+ content. The white-light-emitting diode fabricated via a combination of an ultraviolet light-emitting diode (λpeak=385nm) with La0.827Al11.9O19.09:Eu2+,Mn2+ showed a warm white light (Tc=3559K).