科研之友
微信
新浪微博
Facebook
分享链接
摘要
Novel sugar apple-shaped SnO2 microspheres with no additives were prepared by facile hydrothermal method and morphological modification was achieved by adding urea as an additive agent at 160 degrees C. Photoanode materials were characterized using X-ray diffraction, scanning electron microscope, transmission electron microscope, Raman analysis, Fourier transform infrared spectrum, diffuse reflectance spectroscopy, and electrochemical impedance spectroscopy techniques. Sugar apple SnO2 microspheres and urea-assisted SnO2 microspheres had rutile crystalline phase with a diameter of 2-3 mu m and optical studies showed that the light scattering was observed at a wavelength of 400-800 nm. The novel sugar apple morphology changed into SnO2 microspheres composed of nanoparticles with an addition of 0.3 M urea, that is, from pyramidal crystal facets (210 nm) to nanoparticles (22 nm). Dye-sensitized solar cells photoanode film was prepared by doctor blade technique which was dipped in N719 dye. Obtained SnO2 microspheres were also used as a scattering layer on top of P25 film, and the efficiencies were compared. From I-V curve, the high efficiency of eta = 2.76% at a recombination rate of 22.81 ms was obtained for P25/sugar apple SnO2 microspheres which was because of high light scattering effect of the crystal and the combination of P25.
- 出版日期2017-7
