Highly efficient polymer blends from a polyfluorene derivative and PVK for LEDs
The photophysical and electroluminescent properties of blends of a polyfluorene derivative of the PPV type, poly[(9,9-dihexyl-9H-fluorene-2,7-diyl)-1,2-ethenediyl-1,4-phenylene-1,2-ethenediyl] (labeled as LaPPS16) and poly(vinylcarbazole) – PVK are presented and discussed in terms of the operating l...
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| Veröffentlicht in: | Polymer (Guilford) 2009-11, Vol.50 (25), p.6057-6064 |
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| creator | Nowacki, Bruno Iamazaki, Eduardo Cirpan, Ali Karasz, Frank Atvars, Teresa D.Z. Akcelrud, Leni |
| description | The photophysical and electroluminescent properties of blends of a polyfluorene derivative of the PPV type, poly[(9,9-dihexyl-9H-fluorene-2,7-diyl)-1,2-ethenediyl-1,4-phenylene-1,2-ethenediyl] (labeled as LaPPS16) and poly(vinylcarbazole) – PVK are presented and discussed in terms of the operating light emission mechanisms. Static and dynamic fluorescence measurements and morphology data showed a powerful exciton migration from the host (PVK) to the guest (LaPPS16) resulting in emission coming from solely LaPPS16, even when in concentrations small as 1%. Electroluminescence was greatly enhanced with the blending; increases of 18 times in efficiency and 20 times in luminance were achieved in the blend containing 20% LaPPS16, with 3
V applied voltage.
[Display omitted] |
| doi_str_mv | 10.1016/j.polymer.2009.09.056 |
| format | Article |
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V applied voltage.
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V applied voltage.
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| subjects | Applied sciences Electrical, magnetic and optical properties Electroluminescence Electronics Exact sciences and technology Optoelectronic devices Organic polymers Photoluminescence Physicochemistry of polymers Polymer blends Properties and characterization Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices |
| title | Highly efficient polymer blends from a polyfluorene derivative and PVK for LEDs |
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