Suppressing aggregation induced quenching in anthracene based conjugated polymers

Congrave, Daniel G.Univ Cambridge, Dept Chem, Cambridge CB2 1EW, England. (författare)

Anthracene is a highly valuable building block for luminescent conjugated polymers, particularly when a large singlet-triplet energy gap (Delta E-ST) is desired. Unfortunately, the extended pi system of anthracene imparts a strong tendency for polymer aggregation, resulting in detrimental effects on its solid state photophysics. A large decrease in photoluminescence quantum yield (PLQY, phi(F)) on going from solution to the solid state is especially common, represented in terms of a low phi(R) (phi(R) = phi(F film)/phi(F sol.)). Significant and undesirable red-shifting of fluorescence in the solid state is also typical due to processes such as excimer formation. In this work a series of alkylene-encapsulated conjugated anthracene polymers is developed to overcome these challenging problems. We demonstrate a promising material which displays a good solid state PLQY that is effectively unchanged compared to solution measurements (phi(R) similar to 1, phi(F film) similar to 40%), alongside an identical PL 0-0 transition wavelength in solution and thin film. Such a direct transfer of luminescence properties from solution to the solid state is remarkable for a conjugated polymer and completely unprecedented for one based on anthracene.

Drummond, Bluebell H.Univ Cambridge, Cavendish Lab, Cambridge CB3 OHE, England. (författare)
Gray, Victor,Dr,1988-Uppsala universitet,Fysikalisk kemi,Univ Cambridge, Cavendish Lab, Cambridge CB3 OHE, England.(Swepub:uu)vicgr594 (författare)
Bond, Andrew D.Univ Cambridge, Dept Chem, Cambridge CB2 1EW, England. (författare)
Rao, AkshayUniv Cambridge, Cavendish Lab, Cambridge CB3 OHE, England. (författare)
Friend, Richard H.Univ Cambridge, Cavendish Lab, Cambridge CB3 OHE, England. (författare)
Bronstein, HugoUniv Cambridge, Dept Chem, Cambridge CB2 1EW, England.;Univ Cambridge, Cavendish Lab, Cambridge CB3 OHE, England. (författare)
Univ Cambridge, Dept Chem, Cambridge CB2 1EW, England.Univ Cambridge, Cavendish Lab, Cambridge CB3 OHE, England. (creator_code:org_t)

Ingår i:Polymer Chemistry: Royal Society of Chemistry12:12, s. 1830-18361759-99541759-9962

Av författaren/redakt...: Congrave, Daniel ...; Drummond, Bluebe ...; Gray, Victor, Dr ...; Bond, Andrew D.; Rao, Akshay; Friend, Richard ...; visa fler...; Bronstein, Hugo; visa färre...

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