跳至主要内容

On the Temperature Dependent Excitation and Reflection Spectra of Ln3Al5O12:Ce3+ Ceramics (Ln = Y, Lu) for White LEDs

Read full paper at:
http://www.scirp.org/journal/PaperInformation.aspx?PaperID=52816#.VKnykMnQrzE

Yttrium aluminum garnet (YAG) and Lutetium aluminum garnet (LuAG) doped with Ce3+ are widely applied phosphor powders or ceramics for the conversion of blue into green to yellow light in the rapidly expanding market of white light emitting high power LEDs. Surprisingly, the temperature dependent reflection and excitation spectra of these well-established materials have not been investigated until today. In this work, we report the temperature dependence of the reflection and excitation spectra of Ce3+ doped YAG and LuAG in the temperature range from 300 to 800 K.
Cite this paper
Jansen, T. and Jüstel, T. (2014) On the Temperature Dependent Excitation and Reflection Spectra of Ln3Al5O12:Ce3+ Ceramics (Ln = Y, Lu) for White LEDs. Materials Sciences and Applications, 5, 1074-1078. doi: 10.4236/msa.2014.514110.
 

[1] Blasse, G. (1967) A New Phosphor for Flying-Spot Cathode-Ray Tubes for Color Television: Yellow-Emitting Y3Al5O12:Ce3+. Applied Physics Letters, 11, 53.
http://dx.doi.org/10.1063/1.1755025
[2] Yan, B., You, J.-P., Tran, N.T. and Shi, F.G. (2013) Influence of Phosphor Configuration on Thermal Performance of High Power White LED Array. 2013 IEEE International Symposium on Advanced Packaging Materials, Irvine, 27 February 2013-1 March 2013, 274-289.
http://dx.doi.org/10.1109/ISAPM.2013.6510411
[3] Feldmann, C., Jüstel, T., Ronda, C.R. and Schmidt, P.J. (2003) Inorganic Luminescent Materials: 100 Years of Research and Application. Advanced Functional Materials, 13, 511-516.
http://dx.doi.org/10.1002/adfm.200301005
[4] Schubert, E.F. (2006) Light-Emitting Diodes. 2nd Edition, Cambridge University Press, Cambridge.
http://dx.doi.org/10.1017/CBO9780511790546
[5] Nakamura, S., Pearton, S. and Fasol, G. (2000) The Blue Laser Diode. The Complete Story. 2nd Edition, Springer Berlin Heidelberg, Berlin.
http://dx.doi.org/10.1007/978-3-662-04156-7
[6] Ivanovskikh, K.V., Ogieglo, J.M., Zych, A., Ronda, C.R. and Meijerink, A. (2012) Luminescence Temperature Quenching for Ce3+ and Pr3+d-f Emission in YAG and LuAG. ECS Journal of Solid State Science and Technology, 2, R3148-R3152.
http://dx.doi.org/10.1149/2.011302jss
[7] Okada, F., Togawa, S., Ohta, K. and Koda, S. (1994) Solid-State Ultraviolet Tunable Laser: A Ce3+ Doped LiYF4 Crystal. Journal of Applied Physics, 75, 49.
http://dx.doi.org/10.1063/1.355828                        eww150105lx

评论

此博客中的热门博文

Electron Spin and Proton Spin in the Hydrogen and Hydrogen-Like Atomic Systems

Read full paper at: http://www.scirp.org/journal/PaperInformation.aspx?PaperID=52202#.VIj7tMnQrzE Author(s) Stanisław Olszewski * Affiliation(s) Institute of Physical Chemistry, Polish Academy of Sciences, Warsaw, Poland . ABSTRACT The mechanical angular momentum and magnetic moment of the electron and proton spin have been calculated semiclassically with the aid of the uncertainty principle for energy and time. The spin effects of both kinds of the elementary particles can be expressed in terms of similar formulae. The quantization of the spin motion has been done on the basis of the old quantum theory. It gives a quantum number n = 1/2 as the index of the spin state acceptable for both the electron and proton ...

Incorporation of High-Altitude Balloon Experiment in High School Science Classrooms

High-altitude balloon is a balloon, filled usually with helium or hydrogen that ascends into an area called “near space” or stratosphere. The most common type of high-altitude balloons are weather balloons. Other purposes include use as a platform for experiments in the upper atmosphere. Modern balloons generally contain electronic equipment such as radio transmitters, cameras, or satellite navigation systems, such as GPS receivers. The mission of the High-Altitude Balloon Experiment (HABE) is to acquire supporting data, validate enabling technologies, and resolve critical acquisition, tracking, and pointing (ATP) and fire control issues in support of future space-based precision pointing experiments. The use of high-altitude balloons offers a relatively low-cost, low-vibration test platform, a recoverable and reusable payload, worldwide launch capability, and a 'near- space' emulation of the future space systems operational scenarios. More recently, several university...

Fermented Brown Sugar Residue Prolongs the Caenorhabditis elegans Lifespan via DAF-16

Fermented brown sugar residue (FBSR) is generated in the course of purifying biomass ethanol from the yeast fermentation products of brown sugar. It contains abundant nutrition and is used in various industrial applications including as fertilizer and feed. Meanwhile, brown sugar has attracted attention as a health food and is thought to prevent cardiovascular diseases, hypertension, and brain stem diseases. Furthermore, polyphenol, contained in brown sugar, reduces oxidative stress and inhibits glucose absorption. DAF-16 is a transcription factor regulated downstream of the insulin signaling pathway and is one of the main factors contributing to aging and lifespan in C. elegans . Therefore, to determine the precise roles of the DAF-16 transcription factor in stress tolerance and life span, it is necessary to elucidate the signaling pathways involved in DAF-16 activation. This study was designed to elucidate the molecular mechanisms controlling the physiological stress toleran...