Yum J H, Moon S J, Humphry-Baker R, Walter P, Geiger T, Nüesch F, Grätzel M, Nazeeruddin M D K
Laboratory for Photonics and Interfaces, Institute of Chemical Sciences and Engineering, School of basic Sciences, Swiss Federal Institute of Technology, CH-1015 Lausanne, Switzerland.
Nanotechnology. 2008 Oct 22;19(42):424005. doi: 10.1088/0957-4484/19/42/424005. Epub 2008 Sep 25.
The effect of chenodeoxycholic acid as the coadsorbent with a squaraine sensitizer on TiO(2) nanocrystalline solar cells was investigated, and it was found that the coadsorbent prevents the squaraine sensitizer from aggregating on the TiO(2) nanoparticles but reduces dye loading leading to an interdependent photovoltaic performance. Analysis of the absorption spectra, and incident monochromatic photon-to-current conversion efficiency data showed that the load of squaraine sensitizer as well as the appearance of H-aggregates is strongly dependent on the molar concentration of chenodeoxycholic acid coadsorbent. The open circuit voltage of the solar cells with chenodeoxycholic acid increases due to the enhanced electron lifetime in the TiO(2) nanoparticles coupled with the band edge shift of TiO(2) to negative potentials.
研究了鹅去氧胆酸作为共吸附剂与方酸菁敏化剂对TiO(2)纳米晶太阳能电池的影响，发现该共吸附剂可防止方酸菁敏化剂在TiO(2)纳米颗粒上聚集，但会降低染料负载量，从而导致相互依赖的光伏性能。对吸收光谱和入射单色光子-电流转换效率数据的分析表明，方酸菁敏化剂的负载量以及H-聚集体的出现强烈依赖于鹅去氧胆酸共吸附剂的摩尔浓度。含有鹅去氧胆酸的太阳能电池的开路电压增加，这是由于TiO(2)纳米颗粒中电子寿命的延长以及TiO(2)的能带边缘向负电位的移动所致。
