高性能聚合物太阳能电池的纳米级形态

Nanoscale morphology of high-performance polymer solar cells.

作者信息

Yang Xiaoniu, Loos Joachim, Veenstra Sjoerd C, Verhees Wiljan J H, Wienk Martijn M, Kroon Jan M, Michels Matthias A J, Janssen René A J

机构信息

Group Polymer Physics, Laboratory of Materials and Interface Chemistry, Eindhoven University of Technology, P.O. Box 513, NL-5600 MB Eindhoven, The Netherlands.

出版信息

Nano Lett. 2005 Apr;5(4):579-83. doi: 10.1021/nl048120i.

DOI:10.1021/nl048120i

PMID:15826090

Abstract

Transmission electron microscopy and electron diffraction are used to study the changes in morphology of composite films of poly(3-hexylthiophene) (P3HT) and a methanofullerene derivative (PCBM) in bulk heterojunction solar cells. Thermal annealing produces and stabilizes a nanoscale interpenetrating network with crystalline order for both components. P3HT forms long, thin conducting nanowires in a rather homogeneous, nanocrystalline PCBM film. Both the improved crystalline nature of films and increased but controlled demixing between the two constitutes therein after annealing explains the considerable increase of the power conversion efficiency observed in these devices.

摘要

透射电子显微镜和电子衍射被用于研究体异质结太阳能电池中聚（3-己基噻吩）（P3HT）和一种甲烷富勒烯衍生物（PCBM）复合膜的形态变化。热退火产生并稳定了一种纳米级互穿网络，两种组分都具有晶体有序性。P3HT在相当均匀的纳米晶PCBM膜中形成长而细的导电纳米线。退火后薄膜晶体性质的改善以及两种组分之间增加但可控的相分离解释了在这些器件中观察到的功率转换效率的显著提高。