Center for Energy Efficient Materials, Departments of Chemistry & Biochemistry, Center of Polymers and Organic Solids, University of California, Santa Barbara, CA, 93106, USA.
Adv Mater. 2014 Jun 25;26(24):4168-72. doi: 10.1002/adma.201400497. Epub 2014 Apr 7.
The addition of small quantities of polystyrene (PS) is a simple and economically viable process that improves the power conversion efficiency of one of the most efficient small molecule donors. Addition of PS increases the solution viscosity, thereby providing thicker layers, and allows the formation of a desirable bulk heterojunction morphology. Moreover, the PS spontaneously accumulates as phase separated domains, away from the electrodes, so as not to interfere with charge extraction.
添加少量的聚苯乙烯（PS）是一种简单且经济可行的方法，可以提高最有效的小分子供体之一的功率转换效率。添加 PS 会增加溶液的粘度，从而提供更厚的层，并允许形成理想的体异质结形态。此外，PS 会自动聚集形成相分离区域，远离电极，以免干扰电荷提取。
