Organic electronic devices using electrical property

The operation of solid-state microelectronic devices largely depends on specific electrical responses occurring at the interface between materials of different nature. A representative example for this statement is the rectifying property of the metal-semiconductor contact, which has been identified as early as the end of the nineteenth century (the semiconductor properties of galena were identified by Karl Ferdinand Braun in 1874 32 years later, Greenleaf Whittier Pickard patented a crystal radio receiver [1], which used a crystal detector that was actually a metal-semiconductor diode made of galena). As a consequence, the performance of these devices critically depends on the quality and reliability of their interfaces. Organic electronic devices do not escape this universal rule. 

This article focuses primarily on the properties of the most extensively studied III—V and II—VI compound semiconductors and is presented in five sections (/) a brief summary of the physical (mechanical and electrical) properties of the 2incblende cubic semiconductors (2) a description of the metal organic chemical vapor deposition (MOCVD) process. MOCVD is the preferred technology for the commercial growth of most heteroepitaxial semiconductor material (J) the physics and (4) apphcations of electronic and photonic devices and (5) the fabrication process technology in use to create both electronic and photonic devices and circuits. 

A reinforcing filler, for example, highly dispersed silicon dioxide, is added to the mixture to produce vulcanizated material with improved strength. Cast silicone organic composites are widely used in electrical and electronic devices, in medicine, in the aircraft industry, etc., due to their ease of processing and the advantageous physical and chemical properties of the cured materials. 

The electrical properties of devices constructed with biomaterials follow the same physical laws as do conventional microelectronic devices and thus equivalent-circuit analysis can be used as a design tool for bioelectronics. What sets biomolecular (and synthetic molecular) electronic devices apart from conventional electronic devices is the exploitation of the vast repertoire of organic and biological chemical reactions and the fact that molecular devices can be constructed with a dimension in the nanometer scale (nanotechnology and nanobiology). 

Polypropylene materials (PP), because of their electric properties (such as surface resistivity Ps, volume resistivity pv, dielectric loss factor tg8, permittivity e), mechanical properties and resistance to noxious agents (resistance to acids, bases, salts and organic solvents) are used in various industries. Polypropylene materials characterise, also, with the lowest specific density among widely used polymers. Those properties predispose polypropylene to be used as a substrate for composite protective screens shielding people and electric or electronic devices against noxious activity of electromagnetic (EM) fields. Composite shields... 

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