Current-brightness-voltage characteristics

Fig. 11.18 left Current-brightness-voltage characteristics of a single-layer red-emitting device based on (l-(phenyl)isoquinoline)2lr(acetylacetonate) piq2lr(acac) (see inset for the chemical structure). The structure of the device was PEDT/PVK PBD piq2lr(acac)/CsF/AI. 

Fig. 11.22 Current-brightness-voltage characteristics of single-layer devices with different doping concentrations of PtOEP in MeLPPP. Solid and open symbols depict brightness-voltage and current-voltage curves, respectively [42].

FIGURE 9.12. Current-voltage and brightness-voltage characteristics of a color-variable light-emitting device under forward and reverse bias conditions. The inset shows the colors of the device under forward and reverse biases in the CIE chromaticity diagram. 

FIGURE 8.22. Current-bias and brightness-bias characteristics of an ITO/m-LPPP PEO LiC104/Al LEC ( , brightness , current). The concentration of m-LPPP PEO LiC104 is 20 10 3. The thickness of the active layer is 200 nm. The characteristics were recorded in a pulsed mode with stepwise increase in the applied voltage. 

FIGURE 9.4. Comparison of (a) brightness-voltage and (b) brightness-current characteristics for a single-layer device (square) and a bilayer device (circle). 

Figure 3.5 Brightness (a) and current density (b) versus voltage characteristics of flexible all-printed OLED with the structure of ITO/PEDOT PSS/PFBT/aluminium...

Figure 4. Current-voltage (—) and brightness-voltage (square) characteristics of a typical bilayer light-emitting device. Inset PL(" ) and EL(—) of a bilayer light-emitting device. Reproduced with permission from reference 23.

Figure 6 The brightness-current-voltage characteristics of the device...

Fig. 11.13 Brightness ( ) and current density ( ) characteristics of a ITO/PEDOT/[lr(DPF)3] PVK-PBD/Ca/Ag device with a lr(DPF)3 concentration of 1 wt.% as function of applied voltage [59].

All electrical measurements were p>erformed under nitrogen in the glove box. The current-voltage (1-V) characteristics were recorded by a computer controlled Keithley 236 source-measure unit (SMU). When the devices were tested for the first time without any prior heat treatment, their behavior was just like that of a PLED with A1 as cathode the tum-on voltage was over 6 volts with relatively low brightness and low efficiency even at high... 

Fig. 8. The current-voltage-brightness (I-V-B) characteristics for the device ITO/PEDOT/2% MATS in superyellow/Ba/ A1 under continuous operation with constant current.

---