Influence of self-assembled monolayer chain length on modified gate dielectric pentacene thin-film transistors

I. G. Hill, C. M. Weinert, L. Kreplak, B. P. Van Zyl

Producción científica: Contribución a una revistaArtículorevisión exhaustiva

34 Citas (Scopus)

Resumen

Self-assembled monolayers are widely used to modify the gate dielectric/semiconductor interface in organic thin-film transistors. By modifying the interaction between the molecular semiconductor and the substrate, thin-film ordering and the electronic properties of the semiconducting channel can be controlled. The modified semiconductor/dielectric properties result in macroscopically observed changes in the charge-carrier mobilities, threshold voltages, subthreshold swing and transfer characteristic hysteresis. The latter two are determined by the density of charge-trapping states at the interface. Here, we investigate the influence of the thickness of the self-assembled monolayer, via the alkyl chain length in n-alkyl phosphonic acid-based monolayers on SiO2, on the electronic properties of pentacene-based organic thin-film transistors. Rather than a monotonic increase or decrease in performance with increasing chain length, we have found that the optimum performance occurs with chains of 8-10 carbon atoms. Atomic force microscopy shows a correlation between pentacene crystalline grain size and transistor performance.

Idioma originalEnglish
Páginas (desde-hasta)81-87
Número de páginas7
PublicaciónApplied Physics A: Materials Science and Processing
Volumen95
N.º1
DOI
EstadoPublished - abr. 2009

ASJC Scopus Subject Areas

  • General Chemistry
  • General Materials Science

Huella

Profundice en los temas de investigación de 'Influence of self-assembled monolayer chain length on modified gate dielectric pentacene thin-film transistors'. En conjunto forman una huella única.

Citar esto