Enhancing Solid-State Emission from Conjugated Polymers via Self-Forming Host–Guest Systems


  • The authors are grateful to NSERC for financial support. We also thank Dr. X. Chen for helpful discussions.


A novel host–guest system leading to enhanced luminescence (see Figure) is investigated using a self-forming, solid-state solution of a conjugated polymer. Poly(fluorene-alt-thiophene)s are synthesized with varying ratios of 2,5- and 3,4-thiophene linkages. Small quantities of 2,5-linkages give rise to systems in which a matrix of 3,4-thiophene-linked conjugated polymer transfers electronic excitation energy to isolated, emitting 2,5-thiophene-linked conjugated segments.