Electrical Conduction Behavior of Organic Light-Emitting Diodes Using Inhomogeneous Fluorinated Self-Assembled Monolayer as a Hole-Injection Layer

Abstract

The modification of a fluorinated self-assembled monolayer (FSAM) on an indium–tin-oxide (ITO) anode enhances hole-injection from ITO and prolongs the lifetime of organic light-emitting diodes (OLEDs). The effect of inhomogeneous modification by shortening the fabrication time can be expressed as the superposition of unmodified and FSAM-modified surface conditions. The FSAM coverage is estimated to be 20–40% by contact angle, work function, atomic force microscopy phase image and current characteristics measurements. The device performance of OLEDs with inhomogeneous FSAMs exhibited intermediate behavior, which suggests that the anode interface condition plays an important role in the conduction and degradation mechanisms of OLEDs.

Electrical Conduction and Luminescence for Inverted-Type Organic Light-Emitting Diodes with Polyethyleneimine

“…Luminance-current-voltage characteristics were measured using a source measure unit (Keithley 2400 Source Measure Unit) and a luminance meter (TOPCON BM-8). The measurements of luminance-current-voltage characteristics were carried out under vacuum of ~0.1 Pa. [18] and is higher than the above values. In the FSAM-modified ITO, the dipole moments of FSAM molecules are facing down to the ITO substrate since each FSAM molecule is adsorbed to ITO via silanol group.…”

Organic-Inorganic Hybrid Perovskite Solar Cells Using Hole Transport Layer Based on α-Naphthyl Diamine Derivative

“…We have previously employed α-NPD as HTL for the fabrication of organic light emitting diode (OLED) [26][27][28] and inspired by the quest to fabricate efficient and low-cost PSCs, we studied the use of α-naphthyl diamine derivative of…”

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

“…The introduction of FSAM suppressed the polycrystallization of a hole transport material, lowered the driving voltage and improved the lifetime of device [1][2][3]. In addition, we introduced the new process of organic nano-dot by growing FSAM [4].…”