Photophysical Properties of a Non-Conjugated Polymer 6FPBO-OD.
Abstract
Previously, we reported the photoluminescence and electroluminescence properties of a blue light emitting non-conjugated polymer 6FPBO-OD(G. Du et al., Bull. Am. Phys. Soc. 42, 539 (1997).). Herein, we present new experimental results in PL lifetimes, steady state photoinduced absorption, and solvent, excitation intensity and temperature dependent PL. These results will be discussed in term of an excimer model to explain the luminescence properties of this polymer. LED brightness was improved to over 200 cd/m^2 and EL internal quantum yield to ~ 0.86% in spite of the relatively low PL yields. The presence of a substantial photoconductivity is attributed to intramolecular charge transfer in 6FPBO-OD assisted by the excimer formation. A comparative study of a related polymer 6FPBO-COPY is reported which may provide insight for improving luminescence properties of 6FPBO-OD and similarly structured polymers. AJE supported by ONR.
- Publication:
-
APS March Meeting Abstracts
- Pub Date:
- March 1998
- Bibcode:
- 1998APS..MAR.I2411D