hearoplane's function [7 articles]

Abstract

Using the vibrating capacitor Kelvin probe technique, we have determined the contact potential difference (CPD) between a reference electrode and various metals acting as charge carrier injecting contacts in organic light-emitting devices (OLEDs). These investigations show that the work function of anode materials for OLEDs such as Pt, Au, and indium tin oxide depends strongly on the surface treatment and can be increased by more than 1 eV via oxygen plasma or UV-ozone cleaning. The device performance of multilayer OLEDs consisting ...

Abstract

In order to reduce the burning off of electrodes in electric arc furnaces, it is necesary to decrease the specific thermal load at the tip in the arc attachment area. This can be achieved by minimizing the work function of the electrode materials, whereby the peak temperature is reduced. The work function of doped graphite electrodes was investigated under conditions prevailing during standard industrial practice in order to achieve transferrable results. The measurement equipment developed to meet this requirement is based ...

Abstract

Electrostatic force measurements were performed by the Kelvin probe force microscopy, which consists of the atomic force microscopy and a conductive tip. Sample surface potential was evaluated through the electrostatic force, which works between the sample and the tip when we apply an AC bias at a frequency fs with a DC offset. If the DC offset voltage is equal to the surface potential difference between the sample and the tip, the amplitude of the fs component in the electrostatic force ...