太阳能电池用稀土铽掺杂二氧化硅减反射和光波转换薄膜

SiO_2: Tb^(3+) nanoparticle based anti-reflection and wavelength conversion bi-functional films for solar cells

采用凝胶溶胶法,在玻璃片上镀制了稀土铽掺杂的SiO_2薄膜,讨论了稀土Tb^(3+)和金属Zn^(2+)掺杂及掺杂量对薄膜样品透过率曲线、发光和太阳能电池光电转换效率的影响。实验结果表明稀土Tb^(3+)和金属Zn^(2+)掺杂量均为0.4%时,薄膜样品的发光及太阳能输出功率最高,太阳能电池转换效率提高了6.25%。实现了减少反射和紫外可见光波转换的双重功能。

Tb^3＋ doped SiO2 nanoparticle films were successfully prepared via sol-gel and dip-coating method on K9 glass. The relationship between optical transmittance spectra, luminescence performance, photoelectric conversion efficiency and doped amount of Tb^3＋ and Zn^2＋ was discussed. As a result, the photoelectric con- version efficiency could improve 6. 25% and the prepared films had a strong luminescence intensity when the doped amount of Tb^3＋ and Zn^2＋ were both 0. 4%. This indicates that anti-reflection and wavelength conversion bi-function could be well demonstrated by SiO2： Tb^3＋ based nanoparticle films.