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]
2008; American Institute of Physics; Volume: 104; Issue: 11 Linguagem: Inglês
10.1063/1.3033376
ISSN1520-8850
AutoresTiziano Agostinelli, Mario Caironi, Dario Natali, M. Sampietro, Giovanni Dassa, Eleonora V. Canesi, Chiara Bertarelli, G. Zerbi, Juan Cabanillas‐González, S. De Silvestri, Guglielmo Lanzani,
Tópico(s)Luminescence and Fluorescent Materials
ResumoPlanar 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.
Referência(s)