Electronics property light-emitting diodes

FIGURE 9.11 A 100 dpi AM-PLED pixel optoelectronic characteristics, (a) Optoelectrical characteristics of a typical red PLED fabricated in our laboratory on flexible plastic substrates, (b) and (c) extracted optoelectrical properties of pixel PLED. (From Hong, Y., Nahm, J.-Y., and Kanicki, J., IEEE J. Selected Top. Quantum Electron. Org. Light-Emitting Diodes, 10, 1, 2004. With permission.)... 

With detailed derivations of important equations, this applications-oriented text examines the structure and properties of materials, such as heavy metal glasses and superconductors. It also explores recent developments in organics electronics, polymer light-emitting diodes, superconductivity, and more. 

T. Yamamoto, K. Sugiyama, T. Kushida, T. Inoue, and T. Kanbara, Preparation of new electron-accepting Tr-conjugated polyquinoxalines. Chemical and electrochemical reduction, electrically conducting properties, and use in light-emitting diodes, J. Am. Chem. Soc., 118 3930-3937, 1996. 

Other exploits have focused on the electronic manipulation of the PPEs via side chains (Table 4, entries 7-16) [36]. If a conjugated side chain is utilized, then the electronic properties of the resulting PPE are influenced. The synthesis of such cross-conjugated PPE-PPV derivatives involves the Pd-catalyzed coupling of a diethynylbenzene derivative with a l,4-distyryl-2,5-diiodoben-zene. The electronic properties of such PPEs are variable by changing the styryl side chain (Table 4, entries 7-12). The polymers are attractive as active layers in light-emitting diodes (LEDs) and thin-film transistors. 

Since the discovery of doped polyacetylene, a range of polymer-intense semiconductor devices have been studied including normal transistors and field-effect transistors (FETs), and photodiodes and light-emitting diodes (LEDs). Like conductive polymers, these materials obtain their properties due to their electronic nature, specifically the presence of conjugated pi-bonding systems. 

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