Evaluation and visualization of nano structure of reaction-active interface for organic polymer thin films

(1)采用波荡器型同步辐射光源和小角光散射系统，建立了有机聚合物薄膜掠入射小角/广角X射线散射（GISAXS/GIWAXS）测量系统，作为纳米尺度结构评价系统。(2)在聚（3-烷基噻吩）（P3 AT）和富勒烯衍生物（FD）的共混物的薄膜中，P3 HT链形成晶体/非晶，并且FD在非晶状态下形成纳米簇。对于具有不同光电转换效率的共混膜，基于GISAXS图案评估了共混膜的侧边型晶体的微晶尺寸和共混膜的面内界面形貌。结果表明，随着微晶尺寸的增大，光电转换效率变大。此外，有人建议，共混膜的面内界面形貌可能与光电转换效率。

(1) A grazing-incidence small-angle/wide-angle X-ray scattering (GISAXS/GIWAXS) measurement system was established for organic polymer thin films by using an undulator-type synchrotron light source and a small-angle optical scattering system as a nano-scale structure evaluation system. (2) In thin films of blends of a poly(3-alkylthiophene) (P3AT) and a fullerene derivative (FD), P3HT chains form crystals/amorphous and the FDs form nano clusters in the amorphous state. For the blend films having different photoelectric conversion efficiency, crystallite size of the edge-on type crystal and the in-plane interfacial topography of the blend films were evaluated on the basis of GISAXS patterns. As a result, it was indicated that the photoelectric conversion efficiency became larger with increasing the crystallite size. Also, it was suggested that the in-plane interface topography of the blend films might correlate with the photoelectric conversion efficiency.