Thermal control of near-infrared and visible electroluminescence in alkyl-phenyl substituted polythiophenes
- 19 September 1994
- journal article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 65 (12) , 1489-1491
- https://doi.org/10.1063/1.112021
Abstract
We report electroluminescence from a regioregular alkyl-phenyl substituted polythiophene. The polymer film exists in two forms, giving widely different optical absorption, as well as photoluminescence and electroluminescence spectra. In the low-bandgap form, we observe high emission intensity centered at 1.55 eV (800 nm), well into the infrared, while the high-bandgap form gives a maximum at 1.85 eV (670 nm). The conversion from the high-bandgap form to the low-bandgap form can be done by thermal treatment of the polymer light emitting diodesKeywords
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