Transient electroluminescence from PPV under strong voltage pulses[Poly(phenylenevinylene)]
Conference
·
OSTI ID:20034074
The authors have studied the transient electroluminescence (EL) from poly(phenylenevinylene), PPV, as a function of electric field under strong electric pulses up to fields of E {approx} 10{sup 9} V/m with emphasis on (a) the time delay, {tau}, between the electric pulse and the onset of the EL emission pulse and (b) the EL intensity as a function of the field. A monotonic decrease of {tau} with increasing E is explained by an increase of the carriers mobility according to Frenkel-Poole model. The EL intensity at high fields is proportional to E{sup 3} suggesting that the contacts at the polymer-metal electrode interfaces are practically ohmic. The authors demonstrate significantly improved brightness, peak power and lifetimes for polymer-based light emitting diodes working under such a pulsed mode.
- Research Organization:
- Hebrew Univ. of Jerusalem (IL)
- Sponsoring Organization:
- VW Foundation; Israeli Ministry of Science and Arts
- OSTI ID:
- 20034074
- Country of Publication:
- United States
- Language:
- English
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