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采用溶胶-凝胶法制备了TiO2/Sm3+下转换薄膜,利用其下转换特性将紫外光转换为可见光,提高了可见光光照强度。利用X射线衍射和荧光光谱对TiO2/Sm3+粉体进行了表征,并对TiO2/Sm3+下转换薄膜进行了荧光光谱测试和紫外-可见分光光度计测试。荧光光谱显示,TiO2/Sm3+薄膜在受到395 nm紫外光照射时可发射出540~600 nm连续波长的可见光,具有下转换特性。二层TiO2/Sm3+下转换薄膜的可见光透过率与单纯的TiO2薄膜基本相同,利用其下转换特性使电池短路电流提高了13.2%,光电转换率提高了16.2%。
The TiO2 / Sm3 + conversion film was prepared by the sol-gel method. The UV-visible light was converted into visible light by the down-conversion property, which improved the visible light intensity. The TiO2 / Sm3 + powders were characterized by X-ray diffraction and fluorescence spectroscopy. Fluorescence spectra and UV-Vis spectrophotometer tests were performed on TiO2 / Sm3 + films. Fluorescence spectra show that the TiO2 / Sm3 + thin film can emit visible light with a continuous wavelength of 540-600 nm when it is exposed to 395 nm UV light, and has the characteristics of down conversion. The visible light transmittance of the second TiO2 / Sm3 + downconverting film is almost the same as that of pure TiO2 film. With its downconversion property, the short-circuit current of the battery is increased by 13.2% and the photoelectric conversion rate is increased by 16.2%.