|
|||||
|
|
Efficient cerium-based sol-gel derived phosphors in different garnet matrices for light-emitting diodes |
|
| Authors: | Arturas Katelnikovas Jonas Jurkevi?ius Karolis KazlauskasPranciškus Vitta Thomas JüstelAivaras Kareiva Artūras ?ukauskasGintautas Tamulaitis |
| Affiliation: | a Department of General and Inorganic Chemistry, Vilnius University, Naugarduko 24, LT-03225 Vilnius, Lithuania b Semiconductor Physics Department and Institute of Applied Research, Vilnius University, Sauletekio 9, LT-10222 Vilnius, Lithuania c Department of Chemical Engineering, University of Applied Sciences Münster, Stegerwaldstr. 39, D-48565 Steinfurt, Germany |
| Abstract: | Efficiency of sol-gel derived Y3−xAl5O12:Cex3+ (YAG:Ce) and Y3−xMg2AlSi2O12:Cex3+ (YMASG:Ce) phosphors, which are prospective for application in white light emitting diodes (LED), is studied. Sets of samples containing different cerium amount x from 0.015 to 0.06 and sintered at different temperatures (1400-1550 °C) were investigated. Importance of absorption peculiarities in agglomerates of phosphor nanocrystals is demonstrated by studying the excitation wavelength dependence of quantum efficiency and by applying PL measurements in confocal mode. Emission saturation is demonstrated to occur at higher excitation intensities than those typical for operating white LEDs. |
| Keywords: | Phosphors Sol-gel processes Optical properties Luminescence |
| 本文献已被 ScienceDirect 等数据库收录！ | |
