Polymer Light-Emitting Diodes PLEDs

PLED See Polymer Light Emitting Diode (PLED). ... 

Subsequently, Cao et al. [30,31] designed and synthesized polymer 20-22 by similar method and the highly efficient saturated red-phosphorescent polymer light-emitting diodes (PLEDs) were achieved on the basis of copolymer 20. The best device performances are observed with an external quantum efficiency of 6.5% photon/electron (ph/el) at the current density of 38 mA/cm2, with the emission peak at 630 nm (x = 0.65, y = 0.31) and the luminance of 926 cd/m2. 

Deeper insight into CNT functionalities when used as a dopant for polymer solar cells and polymer light-emitting diodes (PLEDs) was presented by Xu et al. [329]. While the PLED gained from rather low CNT doping levels of about 0.02%, the solar cell performance increased further up to 0.2 wt %. The improved EQE of the OLED was explained by a better charge carrier injection from the electrode, whereas for the solar cell exciton dissociation is facilitated by the nanotubes [329]. 

FIGURE 1.7 Device design for a polymer light-emitting diode (PLED). 

Organic Light-Emitting Diodes (OLED) and Polymer Light-Emitting Diodes (PLED) based on the mechanism foreseen by Marcus have been realized in practice. PLEDs are successively formed from an Al, Mg or Ca cathode, an organic conductive polymer and an ITO (Indium, Tin, Oxide) anode, as schematically illustrated in Fig. 36.31. 

According to the similar method, a fiber-shaped polymer light-emitting diode (PLED) was developed on the PET fiber by adip-coatingmethod exceptfor the thermal-evaporation of the outermost Al semitransparent electrode. This PET-based fiber-shaped PLED showed a high luminance of over 1000 cd m which was high enough for application in wearable... 

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