| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1786191 | Current Applied Physics | 2015 | 5 Pages |
•Electronic energy structures of hybrid electrodes with AgNWs were investigated.•Hybrid electrodes have a higher mobility than AgNWs.•The work functions of hybrid electrodes are similar to ITO.•OLED performances were related to the electric properties of hybrid electrodes.
In this study, we investigated the electronic properties of nano-composite structured transparent conductive electrodes (TCEs) based on silver nanowires (NWs) and mostly crystalline indium tin oxide (c-ITO). The analysis results by Hall measurements revealed the improvement of the charge carrier mobility (μ) and sheet charge density (n) of the nano-composite TCEs when compared with homogenous single-layer TCEs. The NW-ITO nano-composite has 28 times larger μ than NW and has at least an order higher n than c-ITO. According to our ultraviolet photoemission spectroscopy (UPS) analysis, the surface electronic structure of the NW-ITO approaches that of the c-ITO surface, which is evident from their similar work functions (Φ), 4.14 eV for the former and 4.15 for the latter. When applied in flexible organic light emitting diodes (f-OLEDs) as an anode, the large carriers of h-TCEs made the current density (J) of f-OLEDs at high voltages increased more than 1.5 times compared to f-OLEDs on c-ITO. Nevertheless, larger carrier mobility of c-ITO (29.90 cm2/V-s) made the f-OLEDs operate at lower turn-on voltage that f-OLEDs on h-TCEs.
