Molecular Orientation and Performance of Nanoimprinted Polymer-Based Blend Thin Film Solar Cells

详细信息    查看全文

• 作者：Xinhui Lu ; Htay Hlaing ; Chang-Yong Nam ; Kevin G. Yager ; Charles T. Black ; Benjamin M. Ocko
• 刊名：Chemistry of Materials
• 出版年：2015
• 出版时间：January 13, 2015
• 年：2015
• 卷：27
• 期：1
• 页码：60-66
• 全文大小：405K
• ISSN：1520-5002

文摘

In this work, we have used synchrotron-based grazing incidence X-ray scattering to measure the molecular orientation and morphology of nanostructured thin films of blended poly(3-hexylthiophene)/[6,6]-phenyl C61-butyric acid methyl ester blends patterned with nanoimprint lithography. Imprinting the blend films at 150 掳C results in significant polymer chain orientational anisotropy, in contrast to patterning the film at only 100 掳C. The temperature-dependent evolution of the X-ray scattering data reveals that the imprint-induced polymer reorientation remains at high temperatures even after the patterned topographic features vanish upon melting. Photovoltaic devices fabricated from the blend films imprinted at 150 掳C exhibit a 鈭?1% improvement in power conversion efficiency compared to those imprinted at 100 掳C, consistent with a polymer chain configuration better suited to charge carrier collection.