디스플레이실험-Photoluminescence property of Lu3Al5O12Ce3+phosphor by addition of GdO2for white LED applications

디스플레이실험-Photoluminescence property of Lu3Al5O12Ce3+phosphor by addition of GdO2for white LED applications

디스플레이실험-Photoluminescence property of Lu3Al5O12Ce3+ phosphor by addition of GdO2 for white LED applications.pptx

목차 1.Introduction 2.Experimental Method 3.Results 4.Conclusion 5.References 본문 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 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 키워드 실험, 디스플레이, 디스플레이실험