Photovoltaic Materials Unit, National Institute of Materials Science, Tsukuba, Ibaraki 305-0047 (Japan).
ChemSusChem. 2014 Jan;7(1):172-8. doi: 10.1002/cssc.201300644. Epub 2013 Oct 15.
Hierarchical SnO2 microspheres with exposed {101} facets are synthesized by a one-pot solvothermal reaction and explored as a scattering layer on top of a SnO2 nanoparticle film for dye-sensitized solar cells (DSCs). The microspheres not only enhance photon harvesting by effective light scattering/reflecting but also improve the energy level of the conduction band edge of the SnO2 photoanode, which leads to a simultaneous increase of the short-circuit photocurrent by 17% and open-circuit photovoltage by 20%. An improved overall conversion efficiency of 3.46% is achieved for DSCs using the SnO2 microspheres, which is the highest value reported so far for pure-SnO2 DSCs. Moreover, the SnO2 -microsphere DSCs exhibit a better photostability than the conventional TiO2 DSCs under simulated full sunlight.
具有暴露的 {101} 面的分级 SnO2 微球通过一步溶剂热反应合成，并作为染料敏化太阳能电池 (DSC) 中 SnO2 纳米颗粒薄膜上的散射层进行了探索。这些微球不仅通过有效光散射/反射增强了光子捕获，还提高了 SnO2 光电阳极导带边缘的能级，从而使短路光电流同时增加了 17%，开路光电压增加了 20%。使用 SnO2 微球的 DSCs 的整体转换效率提高到 3.46%，这是迄今为止纯 SnO2 DSCs 的最高值。此外，在模拟全太阳光下，SnO2-微球 DSCs 比传统的 TiO2 DSCs 具有更好的光稳定性。
