Light-emitting diode
OwnerMargaretha De Kok-Van Breemen, Michael Buechel +2inventors
InventorsMargaretha De Kok-Van Breemen, Michael Buechel, Suzanna De Winter, Simore Vulto
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Abstract
The invention pertains to a light-emitting diode (LED) comprising layers of an anode, an acidic hole conducting-injecting material, a light-emitting polymer, and a cathode, characterized in that the hole conducting-injecting material comprises a poly(3,4-ethylenedioxythiophene poly(styrenesulfonate) (PEDOT), which is obtainable by at least partially neutralizing the PEDOT with an anion that is comprised or formed from a sodium or potassium compound, and the light-emitting material comprises a light-emitting p-arylenevinylene polymer (PAV). The invention further relates to a method for increasing the efficiency of said light-emitting diode.
Claims9
A light-emitting diode (LED) comprising layers of an anode, an acidic hole conducting-injecting material, a light-emitting polymer, and a cathode, characterized in that the hole conducting-injecting material comprises a poly(3,4-ethylenedioxythiophene poly(styrenesulfonate) (PEDOT), which is obtainable by at least partially neutralizing the PEDOT with an anion that is comprised or formed from a sodium or potassium compound, and the light-emitting material comprises a light-emitting p-arylenevinylene polymer (PAV).
A method of driving a LED according to claim 8 wherein the LED is pulsed mode driven at a voltage of at least 10 V, preferable at least 15 V.
Method for increasing the efficiency of a light-emitting diode (LED) comprising layers of an anode, an acidic hole conducting-injecting material, a light-emitting polymer, and a cathode, wherein the hole conducting-injecting material comprises poly(3,4-ethylenedioxythiophene poly(styrenesulfonate) (PEDOT) and the light-emitting material comprises poly(p-arylene vinylene) (PAV), characterized in that the acidic hole conducting-injecting material is at least partially neutralized with an anion that is comprised or formed from a sodium or potassium compound.
Dependencies are inferred from the claim text.