Temperature-dependent photoluminescence of organic semiconductors with varying backbone conformation
- 17 March 2003
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 67 (12), 125204
- https://doi.org/10.1103/physrevb.67.125204
Abstract
We present photoluminescence studies as a function of temperature from a series of conjugated polymers and a conjugated molecule all with distinctly different backbone conformations. The organic materials investigated here are planar methylated ladder-type poly para-phenylene, semi-planar polyfluorene, and nonplanar para-hexaphenyl. In the long-chain-polymers the photoluminescence transition energies blueshift with increasing temperatures. In contrast, in the conjugated molecules transition energies redshift with increasing temperatures. Empirical models that explain the temperature dependence of the band gap energies in inorganic semiconductors are extended to explain the temperature dependence of the transition energies in conjugated molecules.Keywords
This publication has 32 references indexed in Scilit:
- Temperature Dependent Photoluminescence of MBE Grown Gallium Nitride Quantum DotsPhysica Status Solidi (b), 2001
- Photoluminescence of short-period GaAs/AlAs superlattices: A hydrostatic pressure and temperature studyPhysical Review B, 1998
- Emission properties ofpara-hexaphenyl polycrystalline filmsPhysical Review B, 1997
- Temperature dependence of the energies and broadening parameters of the interband excitonic transitions in wurtzite GaNPhysical Review B, 1997
- Photophysics of phenylenevinylene polymersSynthetic Metals, 1996
- On the conjugation length in poly(para‐phenylene)‐type polymersAdvanced Materials, 1995
- Light-emitting diodes based on conjugated polymersNature, 1990
- Temperature dependence of band gaps in Si and GePhysical Review B, 1985
- Temperature dependence of the energy gap in semiconductorsPhysica, 1967
- Zwischenmolekulare Energiewanderung und FluoreszenzAnnalen der Physik, 1948