Grafting hole-transport precursor polymer brushes on ITO electrodes: Surface-initiated polymerization and conjugated polymer network formation of PVK

Timothy M. Fulghum, Prasad Taranekar, Rigoberto C. Advincula

Research output: Contribution to journalArticle

62 Citations (Scopus)

Abstract

We have utilized surface-initiated polymerization (SIP) to functionalize the conducting transparent electrode, indium tin oxide (ITO) with polyvinylcarbazole (PVK) brushes. Atomic force microscopy (AFM) imaging revealed smooth domains of grafted PVK and the composition, confirmed by X-ray photoelectron spectroscopy (XPS) measurements. The PVK is an electrochemically cross-linkable precursor by virtue of the pendant carbazole group and thus capable of forming conjugated polymer network (CPN) films. The electrochemical behavior and oligocarbazole CPN formation were evaluated by cyclic voltammetry (CV) measurements. The covalent linkage of the PVK brush allowed for a direct electroluminescent device preparation on SIP modified ITO in which PVK acts as a hole-transporting layer. In this case, the polyfluorene copolymer can be easily spin-casted on top of the grafted PVK without dissolution problems. This resulted in an improved polymer light-emitting diode (PLED) device behavior where the EL polymer layer can be simply solution cast on the modified ITO irrespective of solubility.

Original languageEnglish
Pages (from-to)5681-5687
Number of pages7
JournalMacromolecules
Volume41
Issue number15
DOIs
Publication statusPublished - 2008 Aug 12
Externally publishedYes

Fingerprint

Conjugated polymers
Brushes
Tin oxides
Indium
Polymers
Polymerization
Electrodes
Luminescent devices
Cyclic voltammetry
Light emitting diodes
Atomic force microscopy
Dissolution
X ray photoelectron spectroscopy
Copolymers
Solubility
Imaging techniques
Chemical analysis
indium tin oxide

ASJC Scopus subject areas

  • Materials Chemistry

Cite this

Grafting hole-transport precursor polymer brushes on ITO electrodes : Surface-initiated polymerization and conjugated polymer network formation of PVK. / Fulghum, Timothy M.; Taranekar, Prasad; Advincula, Rigoberto C.

In: Macromolecules, Vol. 41, No. 15, 12.08.2008, p. 5681-5687.

Research output: Contribution to journalArticle

Fulghum, Timothy M. ; Taranekar, Prasad ; Advincula, Rigoberto C. / Grafting hole-transport precursor polymer brushes on ITO electrodes : Surface-initiated polymerization and conjugated polymer network formation of PVK. In: Macromolecules. 2008 ; Vol. 41, No. 15. pp. 5681-5687.
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