Department of Chemical Engineering, National Taiwan University, Taipei, Taiwan 10617.
ACS Appl Mater Interfaces. 2009 Dec;1(12):2821-8. doi: 10.1021/am900573q.
We have systematically studied the self-organization of poly(3-hexylthiophene) (P3HT), an electrochromic material, upon control of the solvent evaporation rate. We characterized these polymer films using atomic force microscopy and X-ray diffraction measurements. Well-ordered P3HT structures were developed after solvent annealing; these highly crystalline structures exhibited enhanced electrochromic contrast and reduced resistance within the film, leading to larger coloration efficiencies and faster switching times. The optical contrast (Delta%T), coloration efficiency, and switching time of the P3HT films increased from 54.2%, 182.6 cm(2) C(-1), and 5.3 s, respectively, prior to solvent annealing to 64.8%, 293.5 cm(2) C(-1), and 3.2 s, respectively, after application of the solvent-annealing conditions.
我们系统地研究了聚（3-己基噻吩）（P3HT）的自组织，这是一种电致变色材料，通过控制溶剂蒸发速率来实现。我们使用原子力显微镜和 X 射线衍射测量来表征这些聚合物薄膜。在溶剂退火后，开发了有序的 P3HT 结构；这些高结晶结构表现出增强的电致变色对比度和降低的膜内电阻，从而导致更大的着色效率和更快的开关时间。P3HT 薄膜的光学对比度（Delta%T）、着色效率和开关时间分别从溶剂退火前的 54.2%、182.6 cm(2) C(-1)和 5.3 s 增加到溶剂退火后的 64.8%、293.5 cm(2) C(-1)和 3.2 s。
