Charge separation in localized and delocalized electronic states in polymeric semiconductors
Article Abstract:
Conjugated polymers are used in the low-cost fabrication of thin semiconducting films. Over recent years, many polymeric optoelectronic devices have been developed, although it is unclear whether the description of electronic excitations in such materials is more appropriately formed in a molecular or semiconductor picture. Electronic states associated with optical excitations in the conjugated polymer poly(2-methoxy-5-(2'-ethylhexyloxy)-p-phenylene vinylene) were studied, using photocurrent measurements and quantum-chemical calculations, and several photocurrent spectral features were found to be coupled with bands in the absorption spectrum.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1998
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Efficient photodiodes from interpenetrating polymer networks
Article Abstract:
The common phase separation in polymer mixtures can produce the mobile photogenerated holes and electrons necessary for photodiodes with greater performance figures than other devices. The absorption and spectral response are closely matched indicating that charge generation and transport to device electrodes should be efficient. Possible uses for these mixtures include medical imaging's flexible photodectors but solar energy conversion has not yet been optimized.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1995
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Electroluminescence in conjugated polymers
Article Abstract:
Electroluminescence is a phenomenon seen in semiconductors, and early studies established that it requires injection of electrons from one electrode, and holes from the other. Organic thin-film electroluminescence was demonstrated in the 1980s. Research in the use of organic polymers as active semiconductors in light-emitting diodes has rapidly advanced, and the performance or organic LEDs meets many targets required for applications in displays.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1999
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