Abstract
A single-phased white phosphor of α-Sr2P2O7: Dy3+, Tm3+ with low correlated color temperature (CCT) was synthesized by high temperature solid phase method. Our experimental results show that by co-doping Tm3+ and Dy3+ ions in the α-Sr2P2O7 matrix, the blue characteristic emission peak of Tm3+ ions can be used to effectively enhance the blue emission of the phosphor, and finally achieve high-quality white light emission. Moreover, since the emission spectrum of Tm3+ overlaps with the excitation spectrum of Dy3+ in the wavelength band from 445 to 465 nm, Tm3+ can transfer energy to Dy3+ ions, so the emission spectrum of Dy3+ can be further regulated and the emission intensity can be improved. Consequently, by optimizing the co-doping ratio of Tm3+ and Dy3+ ions, we achieved the optimal white light emission in α-Sr2P2O7: 0.01Tm3+, 0.01Dy3+ samples. Under the excitation of 351 nm ultraviolet light, the color coordinates of α-Sr2P2O7: 0.01Tm3+, 0.01Dy3+ emitting white light are (0.3292, 0.3521), and the CCT value is 5500 K, which are almost consistent with the color coordinates of standard white light and the color temperature of daylight. Therefore, α-Sr2P2O7: Dy3+, Tm3+ is a single-phased white phosphor material with great application potential for UV excitation.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call