Kim Woo-Byoung, Lee Jai-Sung
Department of Energy Engineering, DanKook University, 119 Dandae-ro, Dongnam-gu, Cheonan, Chungnam, 330-714, Korea.
J Nanosci Nanotechnol. 2013 Jul;13(7):4622-6. doi: 10.1166/jnn.2013.7772.
To investigate the microstructural effects of the synthesized TiO2 nanopowders such as particle size, specific surface area, pore size and pore distributions for the application of an anode material of dye-sensitized solar cells (DSSC), size-controlled and well-dispersed TiO2 nanopowders were synthesized by chemical vapor condensation (CVC) process in the range of 800-1000 degreesC under a pressure of 50 mbar. The average particle size of synthesized TiO2 nanopowders was increased with increasing temperature from 13 nm for 800 degreesC, 15 nm for 900 degreesC and 26 nm. The specific surface area of synthesized nanoparticles were measured as 119.1 m2/g for 800 degreesC, 104.7 m2/g for 900 degreesC and 59.5 m2/g for 1000 degreesC, respectively. The conversion efficiency values (eta%) of DSSC with the synthesized TiO2 nanopowders at 800 degreesC, 900 degreesC, and 1000 degreesC were 2.59%, 5.96% and 3.66%, respectively. The highest conversion efficiency obtained in the 900 degreesC (5.96%) sample is thought to be attributable to homogeneous particle size and pore distributions, large specific surface area, and high transmittance in regions of dye absorption wavelength.
为了研究合成的TiO₂纳米粉末的微观结构效应，如粒径、比表面积、孔径和孔隙分布，以用于染料敏化太阳能电池（DSSC）阳极材料的应用，在50毫巴的压力下，通过化学气相冷凝（CVC）工艺在800 - 1000℃范围内合成了尺寸可控且分散良好的TiO₂纳米粉末。合成的TiO₂纳米粉末的平均粒径随着温度升高而增大，800℃时为13纳米，900℃时为15纳米，1000℃时为26纳米。合成纳米颗粒的比表面积分别测得800℃时为119.1平方米/克，900℃时为104.7平方米/克，1000℃时为59.5平方米/克。使用在800℃、900℃和1000℃合成的TiO₂纳米粉末的DSSC的转换效率值（η%）分别为2.59%、5.96%和3.66%。在900℃（5.96%）样品中获得的最高转换效率被认为归因于均匀的粒径和孔隙分布、大的比表面积以及在染料吸收波长区域的高透过率。
