Organic electronic devices using films

Liang, C.L., Hong, Z.R., Liu, X.Y., et al. (2000) Organic electroluminescent devices using europium complex as an electron-transport emitting layer. Thin Solid Film, 359, 14—16. 

To produce electronic circuitries based on organic devices, it is also crucial to pattern the organic semiconductors on micrometer scale. Spin coating, as a deposition technique used to prepare uniform thin films, has been successfully implemented for the production of organic electronics. However, the films prepared by spin coating are always continuous and need to be patterned using other... 

The simplest and most widely used model to explain the response of organic photovoltaic devices under illumination is a metal-insulaior-metal (MIM) tunnel diode [55] with asymmetrical work-function metal electrodes (see Fig. 15-10). In forward bias, holes from the high work-function metal and electrons from the low work-function metal are injected into the organic semiconductor thin film. Because of the asymmetry of the work-functions for the two different metals, forward bias currents are orders of magnitude larger than reverse bias currents at low voltages. The expansion of the current transport model described above to a carrier generation term was not taken into account until now. 

Organic polymers are manufactured and used on a massive scale as plastics and elastomers, films and fibres in areas as diverse as clothing, car tyres, compact discs, packaging materials, prostheses and most recently electroluminescent and electronic devices and sensors. The enormous growth in the use of organic polymeric materials since the 1930s can be mainly attributed to their ease of preparation, lightweight nature and unique ease of fabrication. 

Thin organic films are the subject of a great deal of research, motivated by their potential application in micro-electronics. Existing applications, such as in the photo-lithographic production of silicon micro-circuits, involve relatively disordered films. However, higher degrees of order and the use of more complex molecules could lead to systems in which the organic molecules themselves become the active electronic devices. 

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