Effects of Intercalation on the Hole Mobility of Amorphous Semiconducting Polymer Blends

Nichole C. Cates, Roman Gysel, Jeremy E. P. Dahl, Alan Sellinger, Michael D. McGehee

Research output: Contribution to journalArticlepeer-review

69 Scopus citations

Abstract

Fullerenes have been shown to intercalate between the side chains of many crystalline and semicrystalline polymers and to affect the properties of polymer:fullerene bulk heterojunction solar cells. Here we present the first in-depth study of intercalation in an amorphous polymer. We study blends of the widely studied amorphous polymer poly(2-methoxy-5-(3studied amorphous polymer poly(,7·studied amorphous polymer poly(-dimethyloctyloxy)-p-phenylene vinylene) (MDMO-PPV) with a variety of molecules using photoluminescence measurements, scanning electron microscopy, and space-charge limited current mobility measurements. The blends with elevated hole mobilities exhibit complete photoluminescence quenching and show no phase separation in a scanning electron microscope. We conclude that intercalation occurs in MDMO-PPV:fullerene blends and is responsible for the increase in the MDMO-PPV hole mobility by several orders of magnitude when it is blended with fullerenes, despite the dilution of the hole-conducting polymer with an electron acceptor. © 2010 American Chemical Society.
Original languageEnglish (US)
Pages (from-to)3543-3548
Number of pages6
JournalChemistry of Materials
Volume22
Issue number11
DOIs
StatePublished - Jun 8 2010
Externally publishedYes

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