Showing papers on "Organic semiconductor published in 1981"

Electrical Transport in Solids

Abstract: K C Mao and W Hwang 1981 Oxford: Pergamon xvi + 663 pp price £50 This seven-chapter book reviews charge transport, carrier injection, photoelectronic processes and luminescence in semiconductors and insulators. The subtitle reference to organic semiconductors applies to the first chapter on charge transport and the final two chapters on photoelectronic and luminescence topics.

Plastic Schottky barrier solar cells

Abstract: A photovoltaic cell structure is fabricated from an active medium including an undoped, intrinsically p-type organic semiconductor comprising polyacetylene. When a film of such material is in rectifying contact with a magnesium electrode, a Schottky-barrier junction is obtained within the body of the cell structure. Also, a gold overlayer passivates the magnesium layer on the undoped polyacetylene film.

Comment on ’’I‐V and C‐V characteristics of Cr∥H‐Pc∥Cr organic sandwich cell’’

Abstract: It has recently been suggested that the capacitor discharge measurement on an organic Schottky diode determines the injected space charge rather than the barrier charge. The observation of an integral capacitance exceeding the high‐frequency capacitance is shown to imply that the barrier charge is in fact the measured quantity.

Semiconductive polymer composition

Abstract: PURPOSE:To prepare the titled composition keeping the flexibility and processability of the original resin, by dispersing semiconductor particles in a polymer matrix composed of a plurality of polymers which are incompatible with each other. CONSTITUTION:Particles of a semiconductor (e.g. metal oxide or organic semiconductor) are dispersed in a polymer matrix composed of two or more polymers which are incompatible with each other (e.g. a combination of polyethylene and polyvinyl fluoride). The dispersion is carried out to make the conductivity of the semiconductor detectable. It is desirable for the further improvement in the effect, that the polymers are combinations of a crystalline polymer and an amorphous polymer; their weight ratio is 1 to 0.25-4.0, conductive particles (particulaly carbon black) are used together with the semiconductor particles, and the organic semiconductor is tetracyanoquinodimethane salt having a metal- or nitrogen-containing compound as an electron donor.

Solar cell and its manufacture

Abstract: PURPOSE:To obtain the solar cell satisfying flexibility and lightness by forming P type and N type high molecular semiconductors by using an organic semiconductor. CONSTITUTION:A back electrode 2 using gold, platinum, etc., the P type high molecular semiconductor 3 employing polyacetylene, etc., the N type high molecular semiconductor 4 making use of polyacetylene, etc. and a transparent electrode 5 employing In2O3, etc. are laminated successively onto an insulating substrate 1 shaped by a high molecular meaterial such as plastic. A protective film 7 using polycarbonate, etc. is coated on the electrode 5. Accordingly, the solar cell has excellent flexibility and lightness because the N type semiconductor is formed by the organic semiconductor.

New Organic Material for Electronic Device Improvement

Abstract: A large interest is now focused on polyacetylene material, since this simple conjugated polymeric system can be doped by various chemical species and its electrical conductivity is increased by more than twelve order of magnitude by doping processes. P and n type dopants are available such as I2, SbF5 or Na, K. By dopant concentration increase a semiconducting or quasi metallic state are obtained. The optical properties, such as a gap near 1,5 eV, with an absorption coefficient of more than 105 cm−1 around the gap should allow, in the future to use this material especially in photovoltaic cells. This new organic material is obtained at a low cost and very large surface are easily available. Thereafter this material is very sensitive to oxygene and must be protected by an adequate coating.