Abstract
A study was conducted to demonstrate thermal imaging of π-conjugated polymers (πCP), using a novel bilayer approach involving a near-infrared (NIR) dye contained in a film of poly(2-hydroxyethylmethacrylate) (p(HEMA) spin-cast onto a πCP film. Poly(HEMA) was chosen as the polymer support for the NIR dye, due to its better solubility and ease of removal from exposed films, when rinsed with methanol. It was demonstrated that the active conjugated polymer may be heated by exposure to NIR irradiation, while minimizing deleterious mixing of the polymer with the NIR dye, by using the bilayer film architecture. This concept was demonstrated by PFT-TT (poly(9,9-dihexylfluorene- alt-2-(2-bithiophene-3-ethoxy)tetrahydropyran)-co-(9,9-dihexylfluorene-alt- bithiophene)).
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