Yang Peng, Zhao Xin, Wang Zhi-qiang, Lin Hai
Guang Pu Xue Yu Guang Pu Fen Xi. 2015 Dec;35(12):3291-5.
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⁺ emit- ting 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--4ƒ 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 conver- sion layer.
制备并研究了Ce³⁺和Tb³⁺掺杂的碱土硼酸盐（LKZBSB）玻璃及其玻璃体系的光致发光特性，观察到的紫光和绿光荧光分别源自Ce³⁺和Tb³⁺发射中心。在487、543、586和621nm处出现的四个发射带分别归因于Tb³⁺的⁵D₄-->⁷F₆、⁵D₄-->⁷F₅、⁵D₄-->⁷F₄和⁵D₄-->⁷F₃发射跃迁，并且还包括一个在389nm处出现的归因于Ce³⁺的5d--4ƒ电偶极允许跃迁的宽发射带。随着Ce³⁺的引入，LKZBSB玻璃中Tb³⁺的有效激发波长范围显著扩大，与Tb³⁺单掺杂情况相比，在中波紫外（UVB）激发区域中，Ce³⁺/Tb³⁺共掺杂的LKZBSB玻璃中Tb³⁺的绿色荧光增强因子高达73倍。结果表明，在Ce³⁺/Tb³⁺掺杂的LKZBSB玻璃中，紫外（UV）辐射到可见光的转换是有效的，这表明该玻璃在开发作为转换层的增强型太阳能电池方面具有潜在价值。
