A planar organic near infrared light detector based on bulk heterojunction of a heteroquaterphenoquinone and poly[2-methoxy-5-( 2 ′ -ethyl-hexyloxy)-1,4-phenylene vinylene]

Planar organic detectors for the near infrared region of the light spectrum have been realized, processing from solution the quinoid molecule 5, 5 ′ -bis(3,5-di- tert -butyl-4-oxo-2,5-cyclohexadiene-1-ylidene)-5, 5 ′ -dihydro-2, 2 ′ -bithiophene (QBT), which shows a peculiar absorption at 680 nm. Se...

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Bibliographic Details
Published in:Journal of applied physics 2008-12, Vol.104 (11), p.114508-114508-5
Main Authors: Agostinelli, T., Caironi, M., Natali, D., Sampietro, M., Dassa, G., Canesi, E. V., Bertarelli, C., Zerbi, G., Cabanillas-Gonzalez, J., De Silvestri, S., Lanzani, G.
Format: Article
Language:English
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Summary:Planar organic detectors for the near infrared region of the light spectrum have been realized, processing from solution the quinoid molecule 5, 5 ′ -bis(3,5-di- tert -butyl-4-oxo-2,5-cyclohexadiene-1-ylidene)-5, 5 ′ -dihydro-2, 2 ′ -bithiophene (QBT), which shows a peculiar absorption at 680 nm. Sensitization of the active material was obtained by creating a bulk donor-acceptor interface with poly[2-methoxy-5-( 2 ′ -ethyl-hexyloxy)-1,4-phenylene vinylene], which acts as hole acceptor. Photoexcitation and relaxation dynamics in pristine materials and bulk heterojunction have been investigated by means of pump-probe measurements, revealing charge transfer from QBT to polymer and efficient energy transfer the other way round.
ISSN:0021-8979
1089-7550
DOI:10.1063/1.3033376