TY - JOUR
T1 - Transient electroluminescence from PPV under strong voltage pulses
AU - Savvate'ev, V.
AU - Pogreb, R.
AU - Davidov, D.
AU - Chayet, H.
AU - Neumann, R.
AU - Avny, Y.
PY - 1997
Y1 - 1997
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=0031387766&partnerID=8YFLogxK
U2 - 10.1557/proc-488-15
DO - 10.1557/proc-488-15
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AN - SCOPUS:0031387766
SN - 0272-9172
VL - 488
SP - 15
EP - 20
JO - Materials Research Society Symposium - Proceedings
JF - Materials Research Society Symposium - Proceedings
T2 - Proceedings of the 1997 MRS Fall Meeting
Y2 - 1 December 1997 through 5 December 1997
ER -