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采用高温固相反应法制备了Ba1.97Ca1-x(B3O6)2∶Eu2+,Mnx2+(x=0,0.03,0.06,0.15)荧光粉,研究了其相组成与荧光特性。结果表明,样品具有单相Ba2Ca(B3O6)2晶体结构。Eu2+同时占据Ba2+格位和Ca2+格位。在317 nm波长的紫外光激发下,Eu2+辐射出峰值在450 nm附近的宽谱蓝光。通过能量传递作用,Mn2+辐射峰值为600 nm左右的宽谱红光。蓝光和红光叠加形成色坐标为(x=0.371,y=0.282)的近白光发射。样品的激发光谱分布在250~400 nm的波长范围,有望在紫外激发的白光LED中获得应用。
Ba1.97Ca1-x (B3O6) 2Eu2 +, Mnx2 + (x = 0,0.03,0.06,0.15) phosphors were prepared by high-temperature solid-state reaction and their phase compositions and fluorescence properties were studied. The results show that the sample has a single-phase Ba2Ca (B3O6) 2 crystal structure. Eu2 + occupies both Ba2 + and Ca2 + sites. Under the excitation of 317 nm UV light, Eu2 + emits broad-spectrum blue light with a peak near 450 nm. Through energy transfer, Mn2 + radiation has a broad spectrum of red light with a wavelength of about 600 nm. The blue and red light superposition creates a near-white light emission with a color coordinate of (x = 0.371, y = 0.282). The excitation spectrum of the sample is distributed in the wavelength range of 250-400 nm, and it is expected to be used in the UV-excited white LED.