We investigated the effects of the inter- and intra-particle porosity of TiO₂ nanoparticles (NPs) on the resulting photovoltaic performance of DSSCs. Solid and porous TiO₂ NPs with controlled intra-particle porosity were fabricated using Brij-58-templated aerosol-gel and calcination processes. The fabricated solid and porous TiO₂ NPs were stacked as thin films with inter-particle porosity using ethyl cellulose-templated screen-printing and calcination processes. Controlling the inter-particle porosity of TiO₂ NPs was found to be much more effective than controlling the intra-particle porosity of TiO₂ NPs for supporting the maximization of the number of dye molecules. The DSSCs composed of porous photoactive layer with porous TiO₂ NPs were found to have the best power conversion efficiency. This suggests that the TiO₂ NPs with porous structures, due to the controlled formation of both inter- and intra-particle porosity, can maximize the light harvesting of DSSCs through better dye adsorption and effective light trapping.

我们研究了TiO ₂纳米颗粒（NPs）的颗粒间和颗粒内孔隙率对所得DSSC光伏性能的影响。使用Brij-58模板气溶胶凝胶和煅烧工艺制备了具有可控颗粒内孔隙率的固体和多孔TiO ₂ NP。使用乙基纤维素模板丝网印刷和煅烧工艺，将制成的固体和多孔TiO ₂ NPs堆叠成具有颗粒间孔隙率的薄膜。发现控制TiO ₂ NPs的颗粒间孔隙度比控制TiO ₂的颗粒内孔隙度要有效得多。用于支持染料分子数量最大化的NP。发现由具有多孔TiO ₂ NP的多孔光敏层组成的DSSC具有最佳的功率转换效率。这表明具有多孔结构的TiO ₂ NPs，由于颗粒间和颗粒内孔隙率的受控形成，可以通过更好的染料吸附和有效的光捕获来最大化DSSC的光收集。