Electrical Conduction of Organic Thin Film with Copper/Thiol-based Self-Assembled Monolayer Anode

Abstract

We have improved lifetime and low driving voltage of the device using an electrode modified by a silane-based fluorinated self-assembled monolayer (FSAM) on ITO (transparent electrode). In the process of fabricating organic light-emitting diodes (OLEDs) devices using Ag or Cu electrode modified by a fluorinated thiol-based SAM, anomalous current saturation phenomena was observed on current-voltage characteristics only when using a thiol-SAM-modified Cu anode. When the performance of the OLED with thiol-SAM-modified Cu or Ag anode were compared with that of the OLED with FSAM-modified ITO, the thiol-SAM-modified Ag anode showed more excellent performance than the FSAM-modified ITO. The OLED with thiol-SAM-modified Cu anode also showed the strange EL efficiency behavior in the saturation current region.

Fluoroalkylsilanes with Embedded Functional Groups as Building Blocks for Environmentally Safer Self-Assembled Monolayers

“…Moreover, we exploited the concomitant presence of trimethoxysilane, more reactive than ethoxysilane, as a monolayer-forming agent . To the best of our knowledge, very few examples of fluorinated self-assembled FSAM-modified/ITO are reported in the literature up to date, , and this investigation is the first one devoted to the behavior of silanes containing short, environmentally safer perfluorinated groups.…”

Estimation of Electron Current in Organic Light-Emitting Diodes Using an Operating Point Model

“…We investigated the stability of film morphology [20], the carrier injection and device properties [21][22][23][24][25][26][27], and the formation of nano-dot [28] by preparation of fluorinated alkyl silole derivative on indium-tin-oxide (ITO). Especially it is important that the introduction of fluorinated self-assembled monolayer (FSAM) based on alkyl silole derivative improves the hole injection from ITO into a hole-transport material as a hole injection layer.…”