Yao Hai-Long, Ma Jun-Hua, Yang Guan-Jun, He Xue-Long, Fan Sheng-Qiang, Li Cheng-Xin, Li Chang-Jiu
J Nanosci Nanotechnol. 2014 Apr;14(4):2829-35. doi: 10.1166/jnn.2014.8602.
A nano-porous TiO2 layer was produced by spray-deposition using ultrafine anatase nano-particles for the blocking layer for the dye-sensitized solar cells (DSCs). The microstructure and the electrochemical properties of the spray-deposited TiO2 layer were examined. The results of electrochemical properties showed that the spray-deposited TiO2 layer was capable to suppress the I3- ions diffusion to FTO substrate, reducing the electron recombination between the electrons on FTO substrate and I3- ions in electrolyte. In addition, the connection between TiO2 film and FTO substrate was improved by the TiO2 layer. Therefore, the short circuit current density and thereby the photo-to-electric energy conversion efficiency were improved by this blocking layer. The blocking effect of the porous layer was attributed to both the complicated pore structure of the spray-deposited layer and the enhanced connections between TiO2 film and FTO substrate. The low temperature characteristic of spray deposition approach indicates that it is suitable to the flexible-based DSCs.
采用超细锐钛矿纳米颗粒通过喷雾沉积法制备了用于染料敏化太阳能电池（DSC）阻挡层的纳米多孔TiO₂层。对喷雾沉积的TiO₂层的微观结构和电化学性能进行了研究。电化学性能结果表明，喷雾沉积的TiO₂层能够抑制I₃⁻离子向FTO基板的扩散，减少FTO基板上的电子与电解质中I₃⁻离子之间的电子复合。此外，TiO₂层改善了TiO₂薄膜与FTO基板之间的连接。因此，该阻挡层提高了短路电流密度，从而提高了光电能量转换效率。多孔层的阻挡作用归因于喷雾沉积层复杂的孔结构以及TiO₂薄膜与FTO基板之间增强的连接。喷雾沉积方法的低温特性表明它适用于柔性基DSC。
