標題: Vertical Phase Separation in Poly(3-hexylthiophene): Fullerene Derivative Blends and its Advantage for Inverted Structure Solar Cells
作者: Xu, Zheng
Chen, Li-Min
Yang, Guanwen
Huang, Chun-Hao
Hou, Jianhui
Wu, Yue
Li, Gang
Hsu, Chain-Shu
Yang, Yang
應用化學系
Department of Applied Chemistry
公開日期: 23-Apr-2009
摘要: A method which enables the investigation of the buried interfaces without altering the properties of the 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 P3HT enrichment at the free (air) surfaces and abundance of fullerene derivatives at the organic/substrate interfaces. The vertical phase separation is attributed to the surface energy difference of the components and their interactions with the substrates. This inhomogeneous distribution of the donor and acceptor components significantly affects photovoltaic device performance and makes the inverted device structure a promising choice.
URI: http://dx.doi.org/10.1002/adfm.200801286
http://hdl.handle.net/11536/7347
ISSN: 1616-301X
DOI: 10.1002/adfm.200801286
期刊: ADVANCED FUNCTIONAL MATERIALS
Volume: 19
Issue: 8
起始頁: 1227
結束頁: 1234
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