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Photoexcitation dynamics of poly(1,4-phenylene vinylene) (PPV) and poly(2-fluoro-1,4-phenylene vinylene) (PFPV) were investigated. The femtosecond transient absorption spectra were recorded by using a high power femtosecond Ti:sapphire laser system. The laser pulses with 150 fs and 300 μ J/pulse at 800 nm were used to generate white light continuum for a probe beam, and the second harmonic generation...
We report photoluminescence property of poly(2-fluoro-1,4-phenylene vinylene) (PFPV) comparing with that of poly(1,4-phenylene vinylene) (PPV). They were investigated by using steady-state and time-resolved photoluminescence spectroscopy. PFPV showed higher PL quantum efficiency and longer PL lifetime than PPV, which was explained in terms of a trapping of excitons into shallow traps formed by donor-acceptor...
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