A novel blue-emitting NaSrPO4:Eu2+ phosphor for near UV based white light-emitting-diodes

作者：Yim Dong Kyun; Song Hee Jo; Cho In Sun; Kim Ju Seong; Hong Kug Sun^*

来源：Materials Letters, 2011, 65(11): 1666-1668.

DOI：10.1016/j.matlet.2011.03.033

• Phosphors
• Luminescence
• NaSrPO4
• LED

A novel blue-emitting phosphor based on a phosphate host matrix, NaSrPO4:Eu2+, was prepared by a conventional solid-state reaction method. The NaSrPO4:Eu2+ phosphor was efficiently excited at wavelengths of 250-450 nm, which is suitable for the emission band of near ultraviolet (n-UV) light-emitting-diode (LED) chips (350-430 nm). The NaSrPO4:Eu2+ phosphor exhibits a strong blue emission peaking at 453 nm and broadly weak green and red emission bands up to 700 nm. The effect of the activated Eu2+ concentration on the emission intensity of the NaSrPO4:Eu2+ was also investigated. Here, a phosphor-converted LED (pc-LED) was fabricated and exhibits bright blue emission under a forward bias of 20 mA. All of these characteristics suggest that the NaSrPO4:Eu2+ phosphors could be applicable to n-UV based white LEDs.

• 出版日期2011-6-15