SOLUBLE PHTHALOCYANINES - NEW MATERIALS FOR OPTOELECTRONICS

A new class of soluble phthalocyanines was synthesized and their electrical properties were studied. Their UV-VIS spectra consist of two strong Q and Soret bands at about 650 - 800 and 300 - 400 nm, respectively, showing an enhanced broad optical window with lower linear absorption at about 500 nm....

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Published inJournal of Optoelectronics and Advanced Materials Vol. 7; no. 3; pp. 1365 - 1370
Main Authors Biler, M, Zhivkov, I, Rakusan, J, Kardakova, M, Pochekailov, S, Wang, G, Nespurek, S
Format Journal Article
LanguageEnglish
Published 01.06.2005
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Summary:A new class of soluble phthalocyanines was synthesized and their electrical properties were studied. Their UV-VIS spectra consist of two strong Q and Soret bands at about 650 - 800 and 300 - 400 nm, respectively, showing an enhanced broad optical window with lower linear absorption at about 500 nm. The energy of the long-wavelength absorption is in good agreement with activation energy of dark conductivity; thus, the band gap energy can be estimated as 1.7 eV. The phthalocyanines under study are salts, and hence, due to the dissociation of ionic groups, the electrical conductivity is strongly dependent on the air humidity. This effect can be utilized for the construction of humidity sensors. Because of quite a high charge carrier mobility, of the order le cm2 the phthalocyanines were used for the construction of field-effect transistors.
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ISSN:1454-4164