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EnglishWe have investigated the optical properties of a -conjugated poly(arylene-ethynylene) co-polymer, the poly-{[(2,5-dioctyloxy)-1,4-phenylene acetylene]-co-2,6-pyridylene acetylene}, in liquid solutions and blended films with nonconjugated polymers. The red-shifted emission from excimers strongly influences the photoluminescence of solid-state samples but it can be suppressed by using in-vacuum thermal ageing or photoirradiation. Experimental observations suggest this quenching is due to structural reorganization processes that still occur in blends within phase-separated regions of pure co-polymer. Significantly, the suppression of the excimer band does not affect the exciton blue emission in blends, which could help improve color purity for OLEDs and display applications.
| Titolo: | Suppression of the excimer photoluminescence in a poly(arylene-ethynylene) co-polymer |
| Autori: | |
| Data di pubblicazione: | 2005 |
| Rivista: | |
| Abstract: | We have investigated the optical properties of a -conjugated poly(arylene-ethynylene) co-polymer, the poly-{[(2,5-dioctyloxy)-1,4-phenylene acetylene]-co-2,6-pyridylene acetylene}, in liquid solutions and blended films with nonconjugated polymers. The red-shifted emission from excimers strongly influences the photoluminescence of solid-state samples but it can be suppressed by using in-vacuum thermal ageing or photoirradiation. Experimental observations suggest this quenching is due to structural reorganization processes that still occur in blends within phase-separated regions of pure co-polymer. Significantly, the suppression of the excimer band does not affect the exciton blue emission in blends, which could help improve color purity for OLEDs and display applications. |
| Handle: | http://hdl.handle.net/11575/16609 |
| Appare nelle tipologie: | 1.1 Articolo in rivista |
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