通过模板辅助回流法合成的大孔 SnO2 用于高效染料敏化太阳能电池。

Macroporous SnO2 synthesized via a template-assisted reflux process for efficient dye-sensitized solar cells.

机构信息

MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, KLGHEI of Environment and Energy Chemistry, School of Chemistry and Chemical Engineering, Sun Yat-sen University, Guangzhou 510275, P R China.

出版信息

ACS Appl Mater Interfaces. 2013 Jun 12;5(11):5105-11. doi: 10.1021/am4009727. Epub 2013 Jun 3.

DOI:10.1021/am4009727

PMID:23692298

Abstract

Macroporous SnO2 composed of small SnO2 nanoparticles with diameters around 10 nm is prepared via a reflux process. This novel structure is designed as the photoanode in dye-sensitized solar cells (DSSCs), intending to improve the light utilization efficiency with its excellent light scattering ability. Though the dye adsorption of macroporous SnO2 (14.00 × 10(-8) mol cm(-2)) is lower than that of SnO2 nanoparticles (19.24 × 10(-8) mol cm(-2)), the photovoltaic performance of the DSSCs based on the former is 4.87% compared to 4.41% for SnO2 nanoparticles, showing over 10% increment than the latter. This improvement is mainly due to the enhanced light scattering ability and charge collection efficiency of the macroporous structure, both of which contribute to a higher short current density and hence for the better power conversion efficiency. Furthermore, a double-layer structure composed of SnO2 nanoparticles (active layer) and macroporous SnO2 (scattering layer) possess both large dye adsorption (22.82 × 10(-8) mol cm(-2)) and scattering property, thus leads to a significant overall conversion efficiency of 5.78%.

摘要

通过回流过程制备了由直径约为 10nm 的小 SnO2 纳米粒子组成的大孔 SnO2。这种新型结构被设计为染料敏化太阳能电池（DSSC）的光阳极，旨在通过其优异的光散射能力提高光利用效率。尽管大孔 SnO2（14.00×10-8 mol cm-2）的染料吸附量低于 SnO2 纳米粒子（19.24×10-8 mol cm-2），但基于前者的 DSSC 的光伏性能为 4.87%，而 SnO2 纳米粒子为 4.41%，后者的效率提高了 10%以上。这种改进主要是由于大孔结构增强了光散射能力和电荷收集效率，这两者都有助于提高短电流密度，从而提高了更好的功率转换效率。此外，由 SnO2 纳米粒子（活性层）和大孔 SnO2（散射层）组成的双层结构具有较大的染料吸附量（22.82×10-8 mol cm-2）和散射性能，因此导致整体转换效率显著提高，达到 5.78%。