Up‐Conversion Photoluminescence in Polyfluorene Doped with Metal(II)–Octaethyl Porphyrins
- 11 December 2003
- journal article
- research article
- Published by Wiley in Advanced Materials
- Vol. 15 (24) , 2095-2098
Abstract
The up‐conversion photoluminescence (PL) in films of polyfluorene (PF) doped with metallated porphyrins is reported for the first time. The dependence of the up‐conversion process on the pump laser intensity and wavelength, the central metal moiety of the dopants, and the temperature is presented. Up‐conversion emission is observed at pump intensities as low as 2 kW cm–2. Comparison of the PF integral PL intensities after laser excitation by 532, 543, and 405 nm enables the discussion of the energy‐transfer mechanism and the efficiency of the process.Keywords
This publication has 16 references indexed in Scilit:
- EFFICIENT POLYFLUORENE BASED SOLAR CELLSSynthetic Metals, 2003
- Photon energy upconversion in porphyrins: one-photon hot-band absorption versus two-photon absorptionChemical Physics Letters, 2003
- The effect of morphology on the temperature-dependent photoluminescence quantum efficiency of the conjugated polymer poly(9, 9-dioctylfluorene)Journal of Physics: Condensed Matter, 2002
- Improving the Performance of Polyfluorene-Based Organic Light-Emitting Diodes via End-cappingAdvanced Materials, 2001
- Excitation density and photoluminescence studies of polyfluorene excited by two-photon absorptionJournal of Physics: Condensed Matter, 2001
- Mobility enhancement in conjugated polymer field-effect transistors through chain alignment in a liquid-crystalline phaseApplied Physics Letters, 2000
- Mechanisms for enhancement of two-photon absorption in donor–acceptor conjugated chromophoresChemical Physics Letters, 1998
- Emission processes in conjugated polymer solutions and thin filmsChemical Physics Letters, 1997
- Upconversion dye-doped polymer fiber laserApplied Physics Letters, 1996
- Laser Cooling in the Condensed Phase by Frequency Up-ConversionPhysical Review Letters, 1996