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
标签：

评论

发表评论

此博客中的热门博文

Does Immigration Promote the Investment of the Monopolistic Firm?

In the present paper, we examine the effect of increasing uncertainty of immigrants’ growth on the optimal timing of investment of a firm that has a monopolistic power over the labor market. It is revealed that when the uncertainty of immigrants’ growth is more than a threshold level, increasing uncertainty of immigrants’ growth accelerates the optimal timing of firms’ investment and enhances the economic growth, even if the uncertainty of immigrants’ growth is formulated by the geometric Brownian motion, which is in sharp contrast to the standard result that an increase in the uncertainty postpones the optimal timing. With an increase in the immigrants over the past ten years, workforces in the host countries have been growing significantly to the extent that the immigrants represent 70% of the increase in the workforce in Europe, and 47% in the United States as OECD indicates. In the present paper, we attempted to investigate the effect of increased uncertainty caused by the growi...
发表评论
阅读全文

Education Policy Implementation: A Mechanism for Enhancing Primary Education Development in Zanzibar

Education is one of the fundamental rights of individuals; therefore, the government of a country needs to develop and strengthen educational policy and quality as well as to ensure that everyone has equal access to basic education. The improvement of access and quality of education in the world is becoming as an essential factor in development, whereas the basic education (primary school), is acknowledged as a foundation of the higher educational development for every country. To fulfill this goal, governments introduce several policies and procedures; however, it requires some reforms and participation from the politician, policymakers, and other stakeholders to re-examine educational policy so that it can lead to multiplication and betterment of the reforms. Educational reforms actually focus on accountability. A positive educational development and reform is very challenging and needs more effort and strategy on how to use and utilize the resources effectively as such it can achie...
发表评论
阅读全文