摘要:
A tandem white OLED includes an anode; a cathode; at least one broadband electroluminescent unit disposed between the anode and the cathode, wherein the broadband electroluminescent unit includes at least one light-emitting layer and produces at least one color component having an intensity less than desired; at least one color-compensating electroluminescent unit disposed between the anode and the cathode, wherein the color-compensating electroluminescent unit is selected to produce the at least one color component and to increase the color component intensity; and an intermediate connector disposed between each adjacent electroluminescent unit, wherein the intermediate connector has no direct connection to an external power source.
摘要:
An OLED device comprising an anode and a cathode spaced from the anode, two EL units disposed between the anode and cathode, such EL units being in contact with each other and each having at least one light emitting layer; and each EL unit further includes a p-type doped organic hole transporting layer disposed between the light emitting layer and the anode, and an n-type doped organic electron transporting layer disposed between the light emitting layer and the cathode.
摘要:
A tandem OLED includes an anode, a cathode, and a plurality of organic electroluminescent units disposed between the anode and the cathode, wherein each organic electroluminescent unit includes at least one light-emitting layer, and an intermediate connector disposed between each adjacent organic electroluminescent unit, wherein the intermediate connector includes at least a high work function metal layer having a work function of no less than 4.0 eV and a metal compound layer, wherein the intermediate connector has a sheet resistance of higher than 100 kΩ per square, and wherein the high work function metal layer improves the operational stability of the OLED.
摘要:
Disclosed is a multilayer electroluminescent device comprising a cathode, an anode, a light emitting layer (LEL) and a layer disposed between the cathode and anode containing a naphthalene compound represented by formula (1): wherein m is 0, 1 or 2; each Ra is an independently selected substituent and each n is independently 0 to 3; each Ara is an independently selected aromatic group; and each Arb is an independently selected carbocyclic aromatic group; provided that two ring substituents may join to form a ring. The device provides a desired high luminance.
摘要:
An organic electroluminescent device is provided that includes an anode and a substantially pure Mg cathode, an electroluminescent medium disposed between the anode and the cathode, and an adhesion-promoting layer in contact with cathode and the electroluminescent medium. The adhesion-promoting layer comprises at least one metal or metal compound selected from group 1 through group 15 of the Periodic Table of Elements such that the metal has an atomic number of at least 19.
摘要:
An organic luminescent layer for use in an electroluminescent device with improved operating life includes an organic host material capable of sustaining both hole and electron injection and recombination. The layer also includes at least two dopants: a first dopant capable of accepting energy of electron-hole combinations in the host material; and a second dopant capable of trapping the holes from the host material. The first dopant being selected so that the bandgap energy of the first dopant is less than the bandgap energy of the host material and the second dopant being selected to have a hole trapping energy level above the valance band of the host material.
摘要:
Passive matrix and active matrix organic electroluminescent (EL) devices are fabricated by using a single mask which defines a deposition zone for depositing an organic EL medium layer and a cathode by directing respective vapor streams towards a substrate in the deposition zone. Electrically insulative organic shadowing structures are formed over cathode connectors for providing electrical contact between a cathode and a cathode connector in a position where the organic EL medium layer is spaced from a base of a shadowing structure. The electrical contact is achieved by directing an organic EL materials vapor stream towards the substrate in a direction substantially perpendicular to the substrate, and by directing a cathode materials vapor stream towards the substrate under a subtended angle.
摘要:
An organic light-emitting device including a substrate, an anode disposed over the substrate, an organic light-emitting structure disposed over the anode, a cathode buffer layer disposed over the organic light-emitting structure and formed of a material selected to permit high energy deposition of a cathode, and a cathode disposed over the cathode buffer layer and being provided with an electron-injecting dopant which diffuses across the buffer layer to provide an interfacial electron-injecting layer at the interface between the organic light-emitting structure and the cathode buffer layer.
摘要:
A method of making an organic light-emitting device is disclosed in which a dopant layer is formed adjacent to a light-emitting layer containing a light-emitting host material. The dopant is diffused from the dopant layer into the light-emitting layer by exposing the light-emitting layer and the dopant layer to vapor of a fluid or fluid mixture. The method permits doping of a light-emitting layer with one dopant or with multiple dopants so as to modify the color and efficiency of light emitted from the light-emitting layer.