Εξειδίκευση τύπου :	Άρθρο σε επιστημονικό περιοδικό
Τίτλος:	Photophysical Properties of Composites Derived from Poly-N-Epoxypropylcarbazole and Molecules of Organic Conductors
Δημιουργός/Συγγραφέας:	Kukhta, A. V. Davidenko, N. A. Davidenko, I. I. Kukhta, I. N. Mokrinskaya, E. V. Vishnevskii, N. G. Chuprina, D. G. [EL] Μούσδης, Γεώργιος Α.[EN] Mousdis, George A.
Ημερομηνία:	2021-03
Γλώσσα:	Αγγλικά
ISSN:	0021-9037 1573-8647
DOI:	10.1007/s10812-021-01142-2
Περίληψη:	A number of organic compounds such as tetrathiafulvalenes and nickel dithiolenes are capable of forming electroconducting crystal structures with properties ranging from semiconductors to superconductors. These compounds have broad bands in the visible and near-IR spectra [3] similar to sulfur-containing phthalocyanines, high thermal and photochemical stability, and strong electroactive properties. They also have adverse properties since they are not readily worked and quite fragile. Also, the very heterogeneous thin fi lms formed from these compounds from solution consist of independent nano- and macrocrystals. Thus, efforts to expand the range of practical application of these compounds have led to their use as individual molecules in polymer composites. The broad absorption spectrum and electron–donor properties of these molecules would suggest their possible use as photoconductance sensitizers, while a thin polymer matrix would impart fl exibility and mechanical strength. Such composites could be used in the optoelectronic and energy industries as active elements for recording, storage, and treatment of optical information and photovoltaic solar energy converters. Carbazole-containing polymers such as polyvinylcarbazole and polyepoxypropylcarbazole, which possess good fi lm-forming properties, optical transparency, and signifi cant hole conductivity due to the carbazole fragments in the polymer chain, are often used in such composites. Nonequilibrium charge carriers (NCC) in the photoconducting layer arise upon its irradiation with visible light. Sensitizer molecules in the excited state can capture electrons from the carbazole fragments and thereby form carbazole radical-cations, which are NCC. Electron vacancies (holes) in the external electric fi eld drift between adjacent carbazole fragments in poly-N-epoxypropylcarbazole (PEPC) and give rise to a photoconductance current. A condition for the use of photosemiconductor semiconducting polymer composites (SPC) for optoelectronics and photovoltaics is high mobility of the NCC, which would provide for a short photoconductance response time to light irradiation and a broad spectral range of photosensitivity, including the near-IR region. In the previous work, we were the first to study such composites with the simplest nickel dithiolene and showed the existence of photoconducting and photovoltaic properties. To our knowledge, such composites have not yet been investigated.
Τίτλος πηγής δημοσίευσης:	Journal of Applied Spectroscopy
Τόμος/Κεφάλαιο:	88
Τεύχος:	1
Σελίδες:	70-76
Θεματική Κατηγορία:	[EL] Φυσική και θεωρητική χημεία[EN] Physical and theoretical chemistry [EL] Φασματοσκοπία[EN] Spectroscopy
Λέξεις-Κλειδιά:	Polymer composites Tetrathiafulvalene Ni-dithiolene Photoconductivity Photogeneration
Κάτοχος πνευματικών δικαιωμάτων:	© 2021, Springer Science Business Media, LLC, part of Springer Nature
Εμφανίζεται στις συλλογές:	Ινστιτούτο Θεωρητικής και Φυσικής Χημείας (ΙΘΦΧ) - Επιστημονικό έργο