Abstract
We 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 ≈ 109 V/m with emphasis on (a) the time delay, τ, 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 τ 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 E3 suggesting that the contacts at the polymer-metal electrode interfaces are practically ohmic. We demonstrate significantly improved brightness, peak power and lifetimes for polymer-based light emitting diodes working under such a pulsed mode.
Original language | English |
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Pages (from-to) | 15-20 |
Number of pages | 6 |
Journal | Materials Research Society Symposium - Proceedings |
Volume | 488 |
DOIs | |
Publication status | Published - 1997 |
Event | Proceedings of the 1997 MRS Fall Meeting - Boston, MA, USA Duration: Nov 30 1997 → Dec 4 1997 |
ASJC Scopus subject areas
- Materials Science(all)
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering