Purpose of the development: For data-recording media, photovoltaic, and optoelectronic devices.

Recommended application field: Solar power engineering, optical data recording and imaging, optoelectronics.

Advantages over analogues: Polymer photosemiconductors, as compared to their inigranic counterparts with the same output technical parameters, are distinguished by lower energy inputs, smaller dimensions, reduced costs, and the possibility of preparing thin-film flexible nanocomposites. PD composites have advantages over individual photoconducting polymers in that they operate throughout the visible and near IR spectral region, and also exhibit the maxsimum absorption selectivity and light energy conversion efliciency. These properties are helpful in the design of holographic data-recording media with high-level information characteristics which require no protection from outside light during latent image formation, clectroluminescent diodes with a narrow emission band, and photovoltaite solar energy convertes with high sensitivity at the maximum of the solar emission spectrum.

The development stage readiness: The working documentation is developed

Description of the development:
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Polymethine dyes (PDs) represent unique centers of photogeneration and emission recombination of charge carriers in photoconducting polymer matrices. Depending on the donor-acceptor properties (ionization potential and electron affinity) of the PD and the polymer, these centres provide intermolecular electron transfer from the former to the latter or vice versa. As result, cation and anion radicals are formed which are info electronhole pairs by the electrostatic attraction forces of opposite charges. In an external electric field, the pairs dissociate due to field-induced clectron transitions which give rise to directed electron transport, i.e., photocurrent, in a coloured medium. PDs of various ionic states afford the hole (p), electron (n), and mixed-type photoconductivity. Purposefully selected PDs and polymers provide an appropriate conductivity type to obtain a photovoltaic effect in solar batteries, polymer surface-charge modulation and surface-relief deformation in photothermoplastic holographic media used for optical data recording as well as charge carrier capture by PD molecules causing their excitation to a luminescent state in electroluminescent devices.

Possibility of transfer abroad:
Licence's sale
Realization of finished commodity

Photo

Country Ukraine

For additional information turn to:
E-mail: gal@uintei.kiev.ua