基于黄色咔唑发光体到蓝色发光基质中的掺杂和非掺杂有机发光二极管

在发光层中具有取代咔唑化合物的高效多层有机纯蓝光发光二极管

Highly efficient multilayer organic pure-blue-light emitting diodes with substituted carbazoles compounds in the emitting layer

描述了基于1，4，5，8，N-五甲基咔唑（PMC）和N-乙基咔唑（N，N ′-二乙基-3，3 ′-联咔唑）的二聚体（DEC）作为发光层或作为4，4 ′-双（2，2 ′-二苯基乙烯基）-1，1 ′-联苯（DPVBi）基质中的掺杂剂的亮蓝色有机发光二极管（OLED）。获得了C. I.E.坐标x = 0.153 y = 0.100的纯蓝光，电致发光效率η EL为0.4 cd/A，外量子效率η ext.在五层发光器件中，以PMC为发光体，2，9-二甲基-4，7-二苯基-1，10-菲咯啉（BCP）为空穴阻挡材料，获得了0.6%的发光效率和236 cd/m2的亮度L（60 mA/cm 2）.最高效率η_{EL.}采用四层结构和掺杂DPVBi DEC的有源层（CIE坐标x = 0.158，y=0.169，λ peak = 456 nm），获得了4.7 cd/A，η ext = 3.3%的器件性能。η_{ext.}值是在该波长下对于蓝色OLED报道的最高值之一，并且与高达20%的内部量子效率相关。

黄色的飞秒激光刻写掺镝、掺铽的LiLuF4波导激光

Yellow diode-pumped lasing of femtosecond-laser-written Dy,Tb:LiLuF4 waveguide

首次实现基于掺镝材料的黄色波导激光，通过飞秒激光刻写技术获得高效率和稳定输出。

白光有机电致发光器件中色度的微调

White Organic Light-Emitting Diodes with fine chromaticity tuning via ultrathin layer position shifting

描述了使用红荧烯（5，6，1,1，12-四苯基萘）的泛黄发光层的非掺杂白色有机发光二极管，所述泛黄发光层插入空穴传输NPB（4，4 ′-双[N-（1-萘基）-N-苯基氨基]联苯）层和蓝光发光DPVBi（4，4 ′-双（2，2 ′-二苯基乙烯基）-1，1 ′-联苯）层之间的界面的任一侧。红荧烯层的厚度和位置均可实现从深蓝色到纯黄色、通过亮白色的精细色度调节，具有CIE坐标（x= 0.33，y= 0.32），外量子效率为1.9%，显色指数为70。这种结构还提供了精确的感测工具来测量DPVBi和NPB中的激子扩散长度（分别为8.7和4.9 nm）。

Diode pumped silicate fiber for visible laser emission

We demonstrate yellow laser emission using silicate glass fiber as the gain medium. By employing core pumping using widely available GaN diode lasers with emission at 445 nm, we show that Dy3+-doped aluminosilicate glass fiber can be readily excited creating sufficient gain at 581 nm. In this proof of concept demonstration, the maximum output power generated was 3 mW with a slope efficiency approximately 1.8% with respect to injected pump.

Yellow Light Energy Transfer Emitting Diodes Based on mixed Quasi-2D Perovskites

The new class of hybrid organic-inorganic semiconductor (HOIS) materials, based on halide perovskites, is constantly being pursued for applications such as Light Emitting Diodes (LEDs) and solar cells, due to their momentous optoelectronic properties. In this work, we present a single layer LED that operates due to energy transfer effects as well as a simple, instant and low cost method for its fabrication. A LED device based on a mixture of zero dimensional (OD) (CH 3 NH 3 ) 4 PbI 6, two dimensional (2D) (F- C 6 H 4 CH 2 CH 2 NH 2 ) 2 PbI 4 and three dimensional (3D) (CH 3 NH 3 )PbI 3 HOIS, i…

Yellow laser performance of Dy$^{3+}$ in co-doped Dy,Tb:LiLuF$_4$

We present laser results obtained from a Dy$^{3+}$-Tb$^{3+}$ co-doped LiLuF$_{4}$ crystal, pumped by a blue emitting InGaN laser diode, aiming for the generation of a compact 578 nm source. We exploit the yellow Dy$^{3+}$ transition $^{4}$F$_{9/2}$ $\Longrightarrow$ $^{6}$H$_{13/2}$ to generate yellow laser emission. The lifetime of the lower laser level is quenched via energy transfer to co-doped Tb$^{3+}$ ions in the fluoride crystal. We report the growth technique, spectroscopic study and room temperature continuous wave (cw) laser results in a hemispherical cavity at 574 nm and with a high…