摘要
A new convenient calcium cyanamide (CaCN2) reduction route was developed to synthesize the Eu^2+ activated Ca-α-SiAION phosphors containing low oxygen content. The luminescence properties of the obtained products were investigated for white LEDs application. The critical Eu^2+ concentration in various hosts and its effect on the photoluminescence properties were studied. The optimized sample (10at.% Eu^2+ vs. Ca^2+) could be efficiently excited by the current GaN/InGaN blue LED chips and provided emission intensity competitive with that of YAG:Ce^3+ (P46-Y3) standard, revealing that this phosphor was a potential candidate for phosphor-converted white LEDs.
A new convenient calcium cyanamide (CaCN2) reduction route was developed to synthesize the Eu^2+ activated Ca-α-SiAION phosphors containing low oxygen content. The luminescence properties of the obtained products were investigated for white LEDs application. The critical Eu^2+ concentration in various hosts and its effect on the photoluminescence properties were studied. The optimized sample (10at.% Eu^2+ vs. Ca^2+) could be efficiently excited by the current GaN/InGaN blue LED chips and provided emission intensity competitive with that of YAG:Ce^3+ (P46-Y3) standard, revealing that this phosphor was a potential candidate for phosphor-converted white LEDs.
基金
a Grant-in-Aid for the Scientific Research (No16080210) on Priority Areas (440) from the Ministry of Education, Culture, Sports, Science and Technology of Japan