制备并研究了Ce3+和Tb3+掺杂碱土硼酸盐(LKZBSB)玻璃及该体系玻璃的光致发光特性, 观察到起源于Ce3+和Tb3+发光中心的蓝紫色和绿色荧光。 波长为487, 543, 586和621 nm的发射峰分别归属于Tb3+的5D4→7F6, 5D4→7F5, 5D4→7F4和5D4→7F3发射跃迁, 389 nm的宽带发射峰归属于Ce3+的5d→4f电偶级允许跃迁。 通过Ce3+引入, LKZBSB玻璃中Tb3+可见光发射的有效激发波长范围显著扩大, 尤其在中波紫外激发下, Ce3+/Tb3+共掺样品中Tb3+的绿光发射强度相对于Tb3+单掺样品, 增强系数高达73倍。 结果表明, 在Ce3+/Tb3+掺杂LKZBSB玻璃中, 紫外辐射可有效转换成可见光, 作为光转换层对增强型太阳能电池的研发具有重要的应用价值。

Ce3+ and Tb3+ doped alkaline earth borate (LKZBSB) glasses and the photoluminescence properties of glass system have been fabricated and investigated, and the observed violet and green fluorescences are originated from Ce3+ and Tb3+ emitting centers, respectively. Four emission bands peaked at 487, 543, 586 and 621 nm are attributed to the emission transitions 5D4→7F6, 5D4→7F5, 5D4→7F4 and 5D4→7F3 of Tb3+, respectively, and consists of a broad emission band peaking at 389 nm attributed to 5d→4f electric dipole allowed transition of Ce3+. With the introduction of Ce3+, the effective excitation wavelength range of Tb3+ in LKZBSB glasses are remarkably expanded, and the enhanced factor of green fluorescence of Tb3+ in Ce3+/Tb3+ co-doped LKZBSB glasses is up to 73 times in medium-wavelength ultraviolet (UVB) excitation region, compared with that in Tb3+ single-doped case. The results show that the conversion from ultraviolet (UV) radiation to visible light is efficient in Ce3+/Tb3+ doped LKZBSB glasses, demonstrating that the glasses have potential values in developing enhanced solar cell as a conversion layer.