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A new convenient calcium cyanamide (CaCN2) reduction route was developed to synthesize the Eu2+ activated Ca-α-SiAlON phosphors containing low oxygen content. The luminescence properties of the obtained products were investigated for white LEDs applica- tion. The critical Eu2+ concentration in various hosts and its effect on the photoluminescence properties were studied. The optimized sample (10at.% Eu2+ vs. Ca2+) could be efficiently excited by the current GaN/InGaN blue LED chips and provided emission intensity competitive with that of YAG:Ce3+ (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 Eu2 + activated Ca-α-SiAlON phosphors containing low oxygen content. The luminescence properties of the obtained products were investigated for white LEDs applications. The critical Eu2 + concentration in the various hosts and its effect on the photoluminescence properties were studied. The optimized sample (10 at.% Eu2 + vs. Ca2 +) could be excited excited by the current GaN / InGaN blue LED chips and provided emission intensity competitive with that of YAG: Ce3 + (P46- Y3) standard, revealing that this phosphor was a potential candidate for phosphor-converted white LEDs.