Patent ID: 6180963
Filing Date: 2001-01-30
Classification: C09K,H05B

Abstract:
A light emitting diode comprisinga positive electrode, a negative electrode, an inorganic light emitting layer disposed between the electrodes exhibiting at least electroluminescence,a high resistance inorganic electron injecting and transporting layer disposed between said inorganic light emitting layer and said negative electrode, capable of blocking holes and having conduction paths for carrying electrons, andan inorganic hole injecting and transporting layer disposed between said inorganic light emitting layer and said positive electrode, said inorganic hole injecting and transporting layer being a high resistance inorganic hole injecting and transporting layer capable of blocking electrons and having conducting paths for carrying holes,wherein said high resistance inorganic electron injecting and transporting layer containsat least one oxide of an element selected from the group consisting of alkali metal elements, alkaline earth metal elements, and lanthanide elements, the oxide having a work function of up to 4 eV, as a first component andat least one metal having a work function of 3 to 5 eV as a second component.