Vertical phase separation in poly(3-hexylthiophene): Fullerene derivative blends and its advantage for inverted structure solar cells

Zheng Xu, Li Min Chen, Guanwen Yang, Chun Hao Huang, Jianhui Hou, Yue Wu, Gang Li, Chain-Shu Hsu, Yang Yang*

*Corresponding author for this work

研究成果: Article同行評審

630 引文 斯高帕斯(Scopus)

摘要

A method which enables the investigation ofthe buried interfaces without altering the properties ofthe polymer films is used to study vertical phase separation of spin-coated poly(3-hexylthiophene) (P3HT):fullerene derivative blends. X-ray photoelectron spectroscopy (XPS) and atomic force microscopy (AFM) analysis reveals the P3HTenrichment atthefree (air) surfaces and abundance offullerene derivatives at the organic/substrate interfaces. The vertical phase separation is attributed to the surface energy difference ofthe components and their interactions with the substrates. This inhomogeneous distribution ofthe donor and acceptor components significantly affects photovoltaic device performance and makes the inverted device structure a promising choice.

原文English
頁(從 - 到)1227-1234
頁數8
期刊Advanced Functional Materials
19
發行號8
DOIs
出版狀態Published - 23 四月 2009

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