Electronic properties at gold/conjugated-polyelectrolyte interfaces

Jung Hwa Seo, Renqiang Yang, Jacek Z. Brzezinski, Bright Walker, Guillermo C. Bazan, Thuc Quyen Nguyen

Research output: Contribution to journalArticlepeer-review

135 Scopus citations

Abstract

The electronic structure of neutral conjugated polymer and conjugated polyelectrolytes (CPE) was investigated using X-ray (XPS) and UV photoelectron spectroscopy (UPS). Control of film thickness was done by changing spin-casting speed and the solution concentration. Spin coating from a suitable solvent and an appropriate spin speed was selected for the deposition of polymers. Atomic force microscopy (AFM) and XPS were used to determine the film thickness, while molecular orbital alignment and band bending at the interface were determined using XPS and UPS spectra. XPS spectra showed the absence of chemical bond formation between the CPEs and the Au surfaces. The study opened new opportunities to understand the function of these materials in PLEDs, device performance, and the design of new materials for polymer-based optoelectronic devices.

Original languageEnglish
Pages (from-to)1006-1011
Number of pages6
JournalAdvanced Materials
Volume21
Issue number9
DOIs
StatePublished - 6 Mar 2009

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