Langmuir and Langmuir-Blodgett Films of Polyfluorenes and Their Use in Polymer Light-Emitting Diodes |
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| Authors: | Marystela Ferreira Clarissa A Olivati Angelita M Machado Andressa M Assaka José A Giacometti Leni Akcelrud Jr" target="_blank">Osvaldo N OliveiraJr |
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| Affiliation: | 1.Departamento de Física, Química e Biologia, Faculdade de Ciências e Tecnologia,Universidade Estadual Paulista,Presidente Prudente,Brazil;2.Departamento Química,Universidade Federal do Paraná,Curitiba,Brazil;3.Instituto de Física de S?o Carlos,Universidade de S?o Paulo,S?o Paulo,Brazil |
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| Abstract: | The Langmuir and Langmuir-Blodgett (LB) film properties of two polyfluorene derivatives, namely poly(2,7-9,9′-dihexylfluorene-dyil)
(PDHF) and poly(9,9 dihexylfluorene-dyil-vynilene-alt-1,4-phenylene-vyninele) (PDHF-PV), are reported. Surface pressure (П-A)
and surface potential (ΔV-A) isotherms indicated that PDHF-PV forms true monolayers at the air/water interface, but PDHF does
not. LB films could be transferred onto various types of substrate for both PDHF and PDHF-PV. Only the LB films from PDHF-PV
could withstand deposition of a layer of evaporated metal to form a light-emitting diode (PLED), which had typical rectifying
characteristics and emitted blue light. It is inferred that the ability of the polymer to form true monomolecular layers at
the air/water interface seems to be associated with the viability of the LB films in PLEDs. |
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| Keywords: | Langmuir films LB films polyfluorene derivatives PLED photoluminesce electroluminescence |
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