6 results about "Host material" patented technology

Disclosed is an organic electroluminescent device (organic EL device) that is improved in luminous efficiency, sufficiently secures driving stability, and has a simple configuration. This organic EL device comprises organic layers between an anode and a cathode piled one upon another on a substrate and at least one organic layer selected from a light-emitting layer, a hole-transporting layer, an electron-transporting layer, and a hole-blocking layer contains a carbazole compound represented by the following formula (1). In the case where the light-emitting layer of the organic electroluminescent device contains a phosphorescent dopant and a host material, it is the carbazole compound that is contained as the host material. In formula (1), X is C—Y or a nitrogen atom; Y is a hydrogen atom, an alkyl group, a cycloalkyl group, or an aromatic group; n is an integer of 2 to 4: A is an n-valent aromatic group; L is a direct bond or a divalent aromatic group; and R is a hydrogen atom, an alkyl group, or a cycloalkyl group.

The invention relates to a battery technology, in particular to a solid sodium battery electrolyte and a preparation and an application thereof. The electrolyte is a carbonic ester polymer, a sodium salt and a porous support material, wherein the thickness of the electrolyte is 20-600 microns; the ionic conductivity is 1*10<-5>S/cm to 1*10<-3>S/cm; and an electrochemical window is greater than 3.6V. The preparation comprises the following steps: dissolving the carbonic ester polymer and the sodium salt into a solvent at a certain ratio; preparing a film on the porous support material; and carrying out vacuum drying to obtain the solid sodium battery electrolyte material. The assembled solid sodium battery is good in rate capability and has excellent long-cycle stability; and no electrolyte is added, so that the safety is high. The main body material is the carbonic ester polymer, so that the price is low; and the cost is low. The solid sodium battery electrolyte material is simple to prepare.

The invention discloses a high-color-rendering-index white light organic light-emitting device and a preparation method therefor. The device comprises a substrate, a positive electrode layer, an organic functional layer and a negative electrode layer from the bottom up in sequence; the organic functional layer comprises a hole transport layer, a blue light emitting layer and an electron transport layer from the bottom up in sequence; the blue light emitting layer is formed by the following two manners: (1) a host-guest doped structure formed by a host material doped with a blue fluorescent light emitting material, wherein the doping mass ratio of the blue fluorescent light emitting material is 1-20%; and (2) a non-doped structure which is formed by a single-layer host material close to the hole transport layer and a singe-layer blue fluorescent light emitting material close to the electron transport layer. According to the device, only one kind of the blue fluorescent light emitting material is adopted to generate blue light; in combination with the hole transport layer and the host material to form electroplex to generate orange light and red light so as to realize white light emission with high color rendering index; and meanwhile, the device structure and the preparation process are simplified, the production cost is lowered, and the spectrum stability of the device is improved.

The invention discloses a novel lead-free welding material and a scaling powder preparation method thereof. The novel lead-free welding material comprises a main material and scaling powder, and the main material comprises, by weight percentage, 8-12% of zinc, 0.5-2% of manganese and the balance of tin; the scaling powder comprises, by weight percentage, 2% of organic components and 98% of powdered main materials, namely metal powder, subjected to gas atomization technology treatment; the main materials and the scaling powder are in the weight percentage proportion of 80%:20%. Raw materials adopted are low in cost and equipment requirement, so that production cost can be lowered; technical problems about grain fitness size, distribution, size, oxidation level, uniformity and the like existing in the production process of tin-zinc-manganese lead-free alloy materials are solved, and the problem about performance index of electronic industry products is solved.

The invention belongs to the field of organic semiconductor materials, and discloses a bipolar blue light phosphorescent host material, a preparation method and an organic electroluminescent device thereof. The host material has a structural formula shown as the specification. The bipolar blue light phosphorescent host material provided by the invention has hole transport properties and electron transport properties at the same time, and enables balance transport of holes and electrons in a luminescent layer. With a high triplet state energy level, the host material can effectively prevent back transmission of energy to the host material in a luminescence process, thus greatly improving the luminescence efficiency.