Evaluation of Optical Properties of Dye-sensitized Solar Cell Incorporating Mesoscopic Interfacial Roughness

结合介观界面粗糙度的染料敏化太阳能电池的光学性能评估

基本信息

批准号：
16360312
负责人：
ISHIGURO Takashi
金额：
$ 9.47万
依托单位：
Nagaoka University of Technology
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2004
资助国家：
日本
起止时间：
2004 至 2006
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-16360312/
关键词：
solar energy mesoscopic structure solar cell dye-sensitized solar cell surface roughness solar energy conversion photo-catalyst nanostructure メゾスコッピク構造

项目摘要

Dye-sensitized solar cell (DSC) has usually a laminated structure. Optical energy loss due to the reflection at the interface is inevitable because of the difference in the intrinsic refractive index between mediums. The accumulation of these losses results in the considerable amount of the decrease of photo-electric conversion efficiency. In this study, the effect of mesoscopic interfacial rough-structure has been examined in a sense of optical impedance-matching due to the gradient-refractive index caused by the surface roughness.The structure concerned in a DSC is "air/ glass/ transparent conductive film (ITO electrode)/ dye adsorption TiO_2 film" and "Pt counter electrode". ITO and Pr films are prepared by the rf sputtering method. Optical properties of the specimens were measured using an ultraviolet-visible-near infrared spectrometer in the wavelength (λ) range of 0.24-2.60 μm. Surface morphology was observed using an atomic force microscope (AFM). Based on these observed data, the simulation of finite-difference time-domain (FDTD) method has been performed in a range of λ=0.4-1.0μm. The reductions of 3.6%, 0.5% and 0.5% in reflectance of respective roughened interfaces of air/ glass, glass/ ITO and ITO/ dye adsorption TiO_2 have been estimated. The roughened Pt film showed large diffusive reflectance.In this study, it has been confirmed that the suitable roughness is useful for the depression of reflectance at the interfaces in the DSC.

染料敏感的太阳能电池（DSC）通常具有层压结构。由于介质之间的固有折射率差异，由于界面反射而导致的光能损失是不可避免的。这些损失的积累导致考虑光电转换效率降低的考虑量。在这项研究中，由于表面粗糙度引起的梯度反射指数，介观界面粗糙结构的效果已在光学阻抗匹配的意义上进行了检查。DSC中所关心的结构是“空气/玻璃/透明导电膜（ITO电极）/ dye exterode）/ dye dye adsorptignt tio adsorptignt tio tio tio tio tio tio tio tio tio tio tio tio tio film film film film film film film''pt courterd''pt ptirode。 ITO和PR膜是通过RF溅射方法制备的。使用0.24-2.60μm的波长（λ）范围内的紫外线可见性新红外光谱仪测量该物种的光学特性。使用原子力显微镜（AFM）观察到表面形态。基于这些观察到的数据，在λ=0.4-1.0μm的范围内进行了有限差分时间域（FDTD）方法的模拟。估计，估计了相对粗糙的界面，玻璃/ ITO和ITO/ ITO/染料吸附TIO_2的相对粗糙界面的反射率3.6％，0.5％和0.5％。粗糙的PT膜显示出很大的反射率。在这项研究中，已经证实，合适的粗糙度可用于DSC界面处的反射率降低。