摘要
采用溶胶-凝胶法制备了TiO2/Eu3+下转换薄膜,并对其光学特性和光电性能进行了分析。将其应用到染料敏化太阳能电池(DSSC)中,利用其下转换特性将部分紫外光转换为能被染料吸收利用的可见光,提高了DSSC的光照强度,促进了短路电流的增大。荧光光谱显示,下转换薄膜在受到394 nm紫外光照射时可发射出550~640 nm的可见光,具有下转换功能特性。下转换薄膜可以增加电池对太阳光的吸收范围,当涂有二层下转换薄膜时,短路电流密度从8.05 mA·cm-2提高到9.62 mA·cm-2,光电转换效率从3.67%提高到4.32%,转换效率相对提高了17.7%。
TiO2/Eu3 +down-conversion film was prepared by sol-gel method,and its optical and photoelectric properties were analyzed. Applying it to dye-sensitized solar cells( DSSC),partial UV light can be converted to visible light and absorbed by dye according to its down-conversion feature,as thus,the visible light intensity and short circuit currents are improved. The fluorescence spectra show that the down-conversion film can emit 550- 640 nm visible light under 394 nm UV light excitation,which indicates a down-conversion feature of the film. The down-conversion film can increase the wavelength range of DSSC absorption. When bilayer down-conversion films are coated on DSSC,the short circuit current increases from 8. 05 mA·cm- 2to 9. 62 mA·cm- 2,the photoelectric conversion efficiency increases from 3. 67% to 4. 32%.
出处
《发光学报》
EI
CAS
CSCD
北大核心
2014年第10期1182-1187,共6页
Chinese Journal of Luminescence
基金
国家(863)高技术研究发展计划(2006AA05Z417)
大连市科技平台建设项目(2010-354)资助
