Ce3+/Tb3+ Doped Alkaline-Earth Borate Glasses Employed in Enhanced Solar Cells
YANG Peng1, 2, ZHAO Xin1, WANG Zhi-qiang2, LIN Hai1, 2*
1. School of Information Science and Engineering, Dalian Polytechnic University, Dalian 116034, China 2. School of Textile and Material Engineering, Dalian Polytechnic University, Dalian 116034, China
Abstract：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→7F4and5D4→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.
Key words：Ce3+/Tb3+ doping;alkaline earth borate glasses;radiation conversion;enhanced solar cell
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