80results about How to "Facilitates electron injection" patented technology

Mono- and diimide perylene and naphthalene compounds, N- and core-substituted with electron-withdrawing groups, for use in the fabrication of various device structures.

A method of growing an AlGaN semiconductor material utilizes an excess of Ga above the stoichiometric amount typically used. The excess Ga results in the formation of band structure potential fluctuations that improve the efficiency of radiative recombination and increase light generation of optoelectronic devices, in particular ultraviolet light emitting diodes, made using the method. Several improvements in UV LED design and performance are also provided for use together with the excess Ga growth method. Devices made with the method can be used for water purification, surface sterilization, communications, and data storage and retrieval.

An organic light emitting device containing (i) a substrate; (ii) a first electrode, such as an anode; (iii) a mixed region comprising a mixture of a hole transport material and an electron transport material, and wherein this mixed region includes at least one organic luminescent material; (iv) a second electrode, such as a cathode; (v) a thermal protective element coated on the second electrode; wherein, one of the two said first and second electrodes is a hole injection anode, and one of the two electrodes is an electron injection cathode, and wherein the organic light emitting device further comprises; (vi) a hole transport region, interposed between the anode and the mixed region, wherein the hole transport region optionally includes a buffer layer; and (vii) an electron transport region interposed between the cathode and the mixed region.

An organic electroluminescent device including a pair of electrodes and an emitting layer provided between the pair of electrodes, the emitting layer comprising a derivative having an unsymmetrically substituted anthracene as a partial structure and an amine derivative represented by Formula (1),

wherein Ar¹ to Ar⁴ are independently a substituted or unsubstituted aromatic ring having 6 to 50 nucleus carbon atoms, R¹ and R² may be the same or different substituents and linked to each other to form a saturated or unsaturated ring, and p is an integer of 1 to 6.

A method of making an OLED device capable of emitting light through the top electrode of such device includes providing a substrate and an anode over the substrate; providing an emissive layer disposed over the anode; providing first and second layers over the emissive layer with the first layer being in contact with the emissive layer or electron-transport layer and having a compound that includes an electron-injecting element, and the second layer having a reactive metal, and wherein such reactive metal reacts with the compound to release the electron-injecting element that dopes the interfacial region of the emissive layer or electron-transport layer to improve electron-injection and also reduces the reflectivity of the first and second layers is reduced; and providing a transparent conducting non-metallic top electrode over the second layer.

The invention relates to organic electroluminescent devices which comprise triazine derivatives as the electron transport material.

In an optical substrate (1), a concave-convex structure (12) including a plurality of independent convex portions (131 to 134) and concave portions (14) provided between the convex portions (131 to 134) is provided in a surface. The average interval Pave between the adjacent convex portions (131 to 134) in the concave-convex structure (12) satisfies 50 nm≦Pave≦1500 nm, and the convex portion (133) having a convex portion height hn satisfying 0.6 h≧hn≧0 h for the average convex portion height Have is present with a probability Z satisfying 1/10000≦Z≦1/5. When the optical substrate (1) is used in a semiconductor light-emitting element, dislocations in a semiconductor layer are dispersed to reduce the dislocation density, and thus internal quantum efficiency IQE is improved, and a waveguide mode is removed by light scattering and thus the light the extraction efficiency LEE is increased, with the result that the efficiency of light emission of the semiconductor light-emitting element is enhanced.

The invention discloses a S,S-dioxo-dibenzothiophene monomer containing polar substituent groups, water/alcohol soluble polymers thereof, and an application thereof The water/alcohol soluble linear polymers of the S,S-dioxo-dibenzothiophene monomer containing the polar substituent groups and hyperbranched polymers can be used as a cathode interface modification layer of high work function metals, such as aluminium and gold, and thus applied in light-emitting diodes and photovoltaic cell devices. Compared with present polymers (PFN) used for cathode interface layers, the S,S-dioxo-dibenzothiophene unit polymers containing the polar groups has relatively low highest occupied molecular orbital (HOMO) energy level and can simultaneously play effects of electron injection and hole blocking. The polymer can be dissolved in methanol, N,N-dimethyl formamide (DMF), dimethyl sulfoxide (DMSO), water and other polar solvents, and thus phenomena of interface mixing do not occur between an electron transport layer and an active layer during constructing multilayer devices.

Since the conventional electron transporters have low thermal stability, the organic electroluminescent devices using them are not sufficient in terms of the compatibility of their luminance and luminous efficiency with device lifetime.

A 1,3,5-triazine derivative of formula (1) is obtained by a metal catalyst-aided coupling reaction of a compound of formula (2) with a compound of formula (3), and this is used as a composing component of an organic electroluminescent device.

[In the formulae, Ar¹ and Ar² represent phenyl group or the like, R¹ and R² represent hydrogen atom or the like, R³ represents methyl or the like, m is an integer of 0 to 2, X represents 2,4-pyridylene or the like, p is 1 or 2, a and b are 1 or 2, a+b is 3, q is 0 or an integer of p or less, M represents —MgR⁴ group or the like, R⁴ represents chlorine atom or the like, r is p-q, and Y represents a leaving group.]

An organic light emitting display device is disclosed. The organic light emitting display device includes a first light emitting part between an anode and a cathode, the first light emitting part having a first light emitting layer, and a second light emitting part between the first light emitting part and the cathode, the second light emitting part having a second light emitting layer and a third light emitting layer, wherein the second light emitting layer includes a hole-type host and a first electron-type host, and the third light emitting layer includes a first electron-type host and a second electron-type host.

An organic EL element includes a pixel electrode, a light emitting function layer that is formed on the pixel electrode, an electron injection layer formed on the light emitting function layer, and a counter electrode that is formed on the electron injection layer and that has semi-transmissive reflectivity, in which the counter electrode contains a reductive material that reduces material of the electron injection layer and Ag with atomic ratio of 75% or more, and an adsorption layer is formed on the counter electrode.

An organic light emitting display device is discussed. The organic light emitting display device in one embodiment includes at least one light emitting part between an anode and a cathode, and including at least one organic layer and a light emitting layer, wherein the organic layer includes a compound having one or more nitrogen atoms and a substituent with relatively high electron mobility.

The invention discloses a benzene-naphthalene diimide derivative, preparation method and its application. The benzene-naphthalene diimide derivative has the structure as shown in the right. The compound has good film-forming properties, higher mobility and fluorescent efficiency, stable narrow-band light-emitting properties, excellent electron injection and transport capacity. The preparation method uses amidation, Miyaura boric acid esterification, Suzuki coupling and other organic synthesis reactions, the preparation process is simple, and the product yield is high. The benzene-naphthalene diimide derivative can be applied in optoelectronic device fabrication.

The invention relates to a compound for an organic electroluminescent device and application thereof. The compound is represented by the following general formula, wherein L1 and L3 are same or different and are independently selected from hydrogen and C6-C30 aryl; and Ar1 to Ar3 are same or different and are independently selected from hydrogen, halogen, substituted or unsubstituted C6-C30 aryl,or substituted or unsubstituted C2-C30 heteroaryl. The compound has the characteristic that the carbonyl group of amide has good electron affinity, so that electron injection is facilitated; accordingto the amide structure formed by carbazole, d lone pair electrons on N atoms participate in the conjugated bond forming of an indole ring to form an aromatic system, so that the tendency of oxidationis greatly reduced, and the oxidation resistance of the compound is enhanced; and the cyclic amide structure is formed, due to the fact that the effective conjugation effect is generated among components, the whole molecule is easy to form effective accumulation in a solid phase, the transmission effect of charges between molecules is facilitated, and the carrier mobility is improved.