On-line experiments concerning surface-enhanced Raman scattering (SERS) were performed on organic light-emitting diodes based on poly(3-octylthiophene) (P3OT). A simultaneous reduction of the emitted power and an increase in the SERS signal were observed above an 8-V bias voltage. The enhancement of the Raman signal was partly thermal and partly electromagnetic in origin, with clear evidence of cathode roughening induced by current flow. Only a weak chemical interaction between the P3OT film and the cathode was detected.
On-line monitoring of poly(3-octylthiophene)- based light emitting diodes by surface-enhanced Raman Scattering
Giorgetti E.;Margheri G.;Sottini S.;Muniz-Miranda M.;
2005
Abstract
On-line experiments concerning surface-enhanced Raman scattering (SERS) were performed on organic light-emitting diodes based on poly(3-octylthiophene) (P3OT). A simultaneous reduction of the emitted power and an increase in the SERS signal were observed above an 8-V bias voltage. The enhancement of the Raman signal was partly thermal and partly electromagnetic in origin, with clear evidence of cathode roughening induced by current flow. Only a weak chemical interaction between the P3OT film and the cathode was detected.File in questo prodotto:
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