Lee Ji-Hye, Ahn Kyun, Kim Soo-Hyung, Jeong Se-Young, Bae Jong-Sung, Hong Tae-Eun, Kim Hyun-Gyu, Cho Chae-Ryong
J Nanosci Nanotechnol. 2015 Jan;15(1):244-7. doi: 10.1166/jnn.2015.8399.
In this study, we present dye-sensitized solar cells (DSSCs) with improved efficiencies by using SnO2/TiO2 composite photoanodes containing SnO2 at various concentrations. The composites consisted of hollow nanofibers (h-NFs) of SnO2 and TiO2 nanoparticles (NPs). The combination of the large surface area of the NPs and the efficient charge transport in the h-NFs make the use of the SnO2/TiO2 composites advantageous. DSSCs in which composite photoanodes with 50 wt% h-NFs were incorporated showed enhanced efficiencies that were 20% higher than the efficiencies of cells containing TiO2 NP-based photoanodes. These results indicated the improved electron diffusion length and shorter electron transfer time in the composite structures due to the crosslinking between h-NFs and NPs.
在本研究中，我们展示了通过使用含有不同浓度SnO2的SnO2/TiO2复合光阳极来提高效率的染料敏化太阳能电池（DSSC）。该复合材料由SnO2空心纳米纤维（h-NF）和TiO2纳米颗粒（NP）组成。NP的大表面积与h-NF中高效的电荷传输相结合，使得SnO2/TiO2复合材料具有优势。掺入50 wt% h-NF复合光阳极的DSSC显示出效率提高，比含有TiO2 NP基光阳极的电池效率高20%。这些结果表明，由于h-NF与NP之间的交联，复合结构中的电子扩散长度得到改善，电子转移时间缩短。
