A novel single-phase white phosphor NaBaBO 3 :Dy 3+ ,K + for near-UV white light-emitting diodes

Single-Composition White Light Emission from Dy3+ Doped Sr2CaWO6

“…Single-composition white light emitting phosphors with tunable correlated color temperature were successfully synthesized by adjusting the concentration of Dy 3+ ions. There are some single-composition white light emission phosphors materials can be obtained at near ultra-violet(n-UV), such as Ca 9 Gd(PO 4 ) 7 :Eu 2+ , Mn 2+ [25], NaBaBO 3 :Dy 3+ , K + [26], and Sr 3 Y(PO 4 ) 3 :Dy 3+ [27]. However, many materials need UV excitation under 300 nm to realize white light emission, such as Y(P,V)O 4 :Dy 3+ [28], β-GdB 3 O 6 :Bi 3+ , Tb 3+ , Eu 3+ [29], LaNbO 4 :Dy 3+ [30], and LuNbO 4 :Dy 3+ [31].…”

Crystal structure and luminescence properties of self-activated phosphor CsDyP 2 O 7

“…4f transitions of Dy 3+ . They can be assigned to the transitions from the ground 6 H 15/2 state to the excited 4 D 7/2 , 6 P 3/2 , 6 P 7/2 , 6 P 5/2 and 6 M 11/2 states, respectively [10,12]. On the other hand, in many Dy 3+ -activated phosphors, the intensity of the charge transfer (CT) band is usually much stronger than that of f !…”

“…Therefore, it is possible to obtain white luminescence with only Dy 3+ activated phosphors having suitable yellow/blue intensity ratio. In recent years, various phosphates [8,9], borates [10], and molybdates [11] have been reported as promising candidates for white phosphors with high performance. Among the various host materials, phosphates is a suitable one for its significant advantages, such as low sintering temperature, low cost, broad band gap, high luminous efficiency and high chemical stability [12,13].…”