디스플레이실험-Photoluminescence property of Lu3Al5O12Ce3+ phosphor by addition of GdO2 for white LED applications
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추천 연관자료
- 목차
-
1.Introduction
2.Experimental Method
3.Results
4.Conclusion
5.References
- 본문내용
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Introduction
Problems of YAG
Difficult to control CRI
Wavelength between blue light and yellow light
The samples were ground with an agate mortar, then fired at 1550 ℃ for 10hours.
Result Analysis
Intensity according to fraction of Ce3+ ion : 0.15 > 0.21 > 0.09 > 0.03
Intensity is largest at 0.15. Why?
* Concentration Quenching :
Too much activator concentration
->Reabsorption of light increases
->non-radiactive transition increases
->Light emission decreases
* Red shift
Ionic radius :
Lu3+ : 0.86Å, Ce3+ : 1.06Å
Lu3+ is substituted by Ce3+
->Decrease band gap
->Lower emission energy
->Increase wave length
- 참고문헌
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Liu Y, Zhang X, Hao Z, Wang X, Zhang J. Chem commun 2011;47;10677
Blasse G, Bril A. Appl Phys Lett 1967;11:53
Lee SH, Yi JH, Kim JH, Ko YN, Kang YC. Opt Mater 2011;33:538
Nag A, Kutty TRN. J Alloys Compd 2003;54:221
Li HL, Liu XJ, Huang LP. Opt mater 2007;29:1138
Nersisyan Hayk, Won Hyung Il, Won chang Whan. Chem Commun 2011;47:11897
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