Nanosecond Transient Electroluminescene from Polymer Light-Emitting Diodes

David Braun, University of California at Santa Barbara
D. Moses, University of California at Santa Barbara
C. Zhang, University of California at Santa Barbara
A. J. Heeger, University of California at Santa Barbara

Article comments

Copyright © 1992 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in Applied Physics Letters and may be found at http://dx.doi.org/10.1063/1.107971 .

NOTE: At the time of publication, the author David Braun was not yet affiliated with Cal Poly.

Abstract

The transient electroluminescence from polymer light-emitting diodes is reported. When the devices are mounted on a microstrip transmission line, the temporal response is limited by the electrode geometry, with rise and fall times below 50 ns. With low duty-cycle pulses (0.5%) the electroluminescence intensity remains proportional to the current at values up to 10 A/cm², two orders of magnitude greater than possible under direct current operation. Since the spectral blue-shift observed at high current levels (with power dissipation above 1 W/cm²) indicates significant sample heating, still higher levels should be possible with proper thermal management.