Journal
JOURNAL OF POLYMER ENGINEERING
Volume 34, Issue 4, Pages 279-338Publisher
WALTER DE GRUYTER GMBH
DOI: 10.1515/polyeng-2013-0267
Keywords
conjugated polymers; crystalline/polycrystalline organic compounds; hopping conduction; organic field-effect transistors; organic semiconductors
Categories
Funding
- Confederation of Indian Industry (CII)
- Center of Excellence in Green Nanotechnology, CII Western Region, Ahmedabad, Gujarat, India
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With the rich experience of developing silicon devices over a period of the last six decades, it is easy to assess the suitability of a new material for device applications by examining charge carrier injection, transport, and extraction across a practically realizable architecture; surface passivation; and packaging and reliability issues besides the feasibility of preparing mechanically robust wafer/substrate of single-crystal or polycrystalline/amorphous thin films. For material preparation, parameters such as purification of constituent materials, crystal growth, and thin-film deposition with minimum defects/disorders are equally important. Further, it is relevant to know whether conventional semiconductor processes, already known, would be useable directly or would require completely new technologies. Having found a likely candidate after such a screening, it would be necessary to identify a specific area of application against an existing list of materials available with special reference to cost reduction considerations in large-scale production. Various families of organic semiconductors are reviewed here, especially with the objective of using them in niche areas of large-area electronic displays, flexible organic electronics, and organic photovoltaic solar cells. While doing so, it appears feasible to improve mobility and stability by adjusting p-conjugation and modifying the energy band-gap. Higher conductivity nanocomposites, formed by blending with chemically conjugated C-allotropes and metal nanoparticles, open exciting methods of designing flexible contact/interconnects for organic and flexible electronics as can be seen from the discussion included here.
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