Exciton migration in pseudoisocyanine J-aggregates formed in polymer films

• Дата: 2012
• Автори: Sorokin, A.V., Gnap, B.A., Fylymonova, I.I., Yefimova, S.L.
• Формат: Стаття
• Мова: English
• Опубліковано: НТК «Інститут монокристалів» НАН України 2012
• Назва видання: Functional Materials
• Теми: Characterization and properties
• Онлайн доступ: http://dspace.nbuv.gov.ua/handle/123456789/134195
• Назва журналу: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Цитувати: Exciton migration in pseudoisocyanine J-aggregates formed in polymer films / A.V. Sorokin, B.A. Gnap, I.I. Fylymonova, S.L. Yefimova // Functional Materials. — 2012. — Т. 19, № 1. — С. 70-74. — Бібліогр.: 14 назв. — англ.

Exciton transport efficiency in pseudoisocyanine (PIC) J-aggregates formed in PVA thin film has been studied using an exciton trap. As a trap, anionic cyanine dye DiD-C3S has been used. Luminescence spectra have been obtained using luminescence microscope that allows us to collect the spectra from very small areas within the film. Heterogeneous dye distribution has been found. Using Stern-Volmer equation for the J-aggregate luminescence quenching by the trap, it has been found that 50 % J-aggregate luminescence is quenched at the ratio PIC/DiD-C3S = 30:1. The obtained value is very small and points to the exciton migration over rather small distances.