期刊
JOURNAL OF PHYSICAL CHEMISTRY C
卷 114, 期 20, 页码 9459-9468出版社
AMER CHEMICAL SOC
DOI: 10.1021/jp911553s
关键词
-
资金
- Science and Engineering Research Council, Agency for Science, Technology and Research (A*STAR), Singapore
Unoptimized morphology in an all-polymer solar cell is often caused by the strong interaction between polymeric chains. Due to this interaction, the organization of the first component may be disrupted by the second one in the blend, which eventually leads to poor solar cell device performance. Here, for the first time we show the use of highly crystalline poly(3-hexylthiophene) (P3HT) nanofibers as a way to control the morphology in an all-polymer blend. We observe an improvement in the short-circuit current (J(sc)) by a factor of 10 when P3HT nanofibers are incorporated into the blends with polyfluorene copolymers as compared to as-cast blends. These nanofiber blends perform even better than devices subjected to thermal annealing, which is a common technique to optimize blend morphology. This enhanced current density in nanofiber system comes from better optical absorption and improved charge transport-both improvements being the manifestation of a high degree of crystallinity as evident from grazing incidence X-ray diffraction (GIXRD) measurement. Finally, this work demonstrates the potential of using polymer nanofiber to improve the efficiency of all-polymer solar cell devices.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据