Nanoscale functional interlayers formed through spontaneous vertical phase separation in polymer photovoltaic devices

Fang-Chung Chen*, Shang Chieh Chien

*Corresponding author for this work

Research output: Contribution to journalArticle

71 Scopus citations

Abstract

A nanoscale interlayer formed through spontaneous vertical phase separation enhances the efficiency and stability of polymer solar cells. Poly(ethylene glycol) molecules blended into the photoactive layer spontaneously migrate to the surface of the polymer blend to form the interfacial buffer, thereby reducing the contact resistance after undergoing chemical reactions with the Al atoms of the cathode. The vertical phase separation of PEG molecules in the device were investigated by using depth profiling scanning electron microscopy and atomic force microscopy.

Original languageEnglish
Pages (from-to)6865-6869
Number of pages5
JournalJournal of Materials Chemistry
Volume19
Issue number37
DOIs
StatePublished - 25 Sep 2009

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