Temperature dependent photoluminescence from a cyano-substituted phenylene vinylene polymer

We report some steady-state and time-resolved photoluminescence (PL) studies of a cyano-substituted phenlyene vinylene polymer film as a function of temperature. In contrast to simple aromatic molecules, on reducing the temperature the luminescence spectrum drops in intensity, gains structure and sh...

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Bibliographic Details
Published in:Synthetic metals 1999-05, Vol.101 (1-3), p.158-161
Main Authors: Rumbles, G., Samuel, I.D.W., Collison, C.J., Miller, P.F., Moratti, S.C., Holmes, A.B.
Format: Article
Language:English
Subjects:
Applied sciences
Electrical, magnetic and optical properties
Exact sciences and technology
Optical absorption and emission spectroscopy
Organic polymers
Photoluminescence
Physicochemistry of polymers
Poly (phenylene vinylene) and derivatives
Properties and characterization
Time-resolved fast spectroscopy
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Summary:We report some steady-state and time-resolved photoluminescence (PL) studies of a cyano-substituted phenlyene vinylene polymer film as a function of temperature. In contrast to simple aromatic molecules, on reducing the temperature the luminescence spectrum drops in intensity, gains structure and shifts to lower energy. While the rate of decay of the PL increases at short wavelengths and remains almost constant at long wavelengths. Using a simple kinetic scheme involving an intra-chain and an inter-chain excitation, we have successfully explained these data in terms of a delayed luminescence model.
ISSN:0379-6779
1879-3290
DOI:10.1016/S0379-6779(98)00367-1