[5a-A301-1~11] 15.4 III-V-group nitride crystals

△ [5a-A301-1] Study on light emission mechanism in Eu-doped GaN by the initial signal analysis of time-resolved spectroscopy

〇(D)Tomohiro Inaba¹, Takanori Kojima¹, Jun Tatebayashi¹, Genki Yamashita², Eichi Matsubara^2,3, Masaaki Ashida², Yasufumi Fujiwara¹ (1.Osaka univ. Eng., 2.Osaka univ. Eng. Sci., 3.Osaka dent. univ.)

Keywords:europium, GaN

A deep understanding of the light emission mechanism is indispensable for increasing the light output for practical use of Eu-doped GaN red LED. In this study, we measured the sample with the different V / III ratio by the initial signal analysis of time resolved PL. We found that the ratio of the energy transfer rate from GaN to Eu ion and the nonradiative recombination rate of GaN is the key factor of the improved emission efficiency.