Ba2B2O5:Eu3+: A novel red emitting phosphor for white LEDs

• Ba2B2O5:Eu3+ can produce red emission under the n-UV radiation excitation.
• The intensity of Ba2B2O5:Eu3+ is appreciably stronger than that of Y2O2S:Eu3+.
• The CIE chromaticity coordinates of Ba2B2O5:Eu3+ locate in the red region.

A novel red emitting phosphor Ba2B2O5:Eu3+ is synthesized by a high temperature solid state method, and its luminescent properties are investigated. Ba2B2O5:Eu3+ can be excited by the 393 nm radiation excitation, and produce the red emission. For the dominating 618 nm emission, the excitation spectrum has one broad band at 295 nm and several narrow bands at 318, 362, 382, 393, 416, 465 and 526 nm, respectively. The emission intensity of Ba2B2O5:Eu3+ is influenced by the Eu3+ doping content, and the concentration quenching effect of Eu3+ in Ba2B2O5 is also observed. The CIE color coordinates of Ba2B2O5:0.06Eu3+ are about (0.636, 0.362), and locate in the red region.

Ba2B2O5:Eu3+ can produce red emission under the 393 nm radiation excitation. The emission intensity of Ba2B2O5:0.06Eu3+ is appreciably stronger than that of Y2O2S:Eu3+. This means that Ba2B2O5:Eu3+ may be a promising red phosphor for white LEDs.Figure optionsDownload high-quality image (87 K)Download as PowerPoint slide