Electronic devices polymer light-emitting diodes

The aim of this chapter is to present a simple but general band structure picture of the metal-semiconductor interface and compare that with the characteristics of the metal-conjugated polymer interface. The discussion is focused on the polymer light emitting diode (LED) for which the metal-polymer contacts play a central role in the performance of the device. The metal-polymer interface also applies to other polymer electronic devices that have been fabricated, e.g., the thin-film field-effect transistor3, but the role of the metal-polymer interface is much less cruical in this case and... 

Keywords Device performance Electron-transport moiety Hole-transport moiety Polyfluorenes Polymer light-emitting diode... 

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. 

Fundamental and practical issues for phenylenevinylene-based polymer light-emitting diodes. IEEE Trans Electron Devices 44 (8) 1258-1262. 

Polyfluorenes have been developed as promising candidates in organic electronics applications such as polymer light-emitting diodes (PLEDs) and polymer transistors. In the early stages of development, the relationships between polymer structure and device performance were investigated. This is still an important... 

When 3,4-ethylenedioxythiophene (EDOT) is chemically polymerized in the presence of polyacrylic acid (PAA) as a template, conducting nanowires can be assembled from smaller nanowires in a side-by-side manner and exhibit excellent conductivity [115]. The electronic properties of PTh have promoted a wide interest in the development of organic/polymer light-emitting diodes (OLEDs/PLEDs) and it is note worthy that the performance of these devices is dramatically enhanced by the... 

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