58results about How to "Improve charge transport efficiency" patented technology

The invention relates to the technical field of quantum dot light emitting, and provides quantum dot printing ink and a preparation method thereof and a quantum dot light-emitting diode. The quantum dot printing ink is prepared from, by weight, 0.1%-20.0% of quantum dots, 0.1%-15.0% of charge transfer agents, 40.0%-90.0% of solvent, 0.1%-15.0% of viscosity modifier and 0-15.0% of dispersing agent, wherein the charge transfer agents comprise a positive charge transfer agent and a negative charge transfer agent, and the solvent comprises main solvent and cosolvent.

The invention relates to a stable perovskite film and a preparation method thereof and an application of the perovskite film in photoelectric devices. According to the perovskite film, an anti-solventcontaining small organic molecules of a conjugated pi system is dropwise added in a one-step spin-coating preparation process, and a mixed layer of the small organic molecules and perovskite is formed after annealing. Through supermolecular cation-pi interaction between the small organic molecules of the conjugated pi system and cations in the perovskite, the defect of the perovskite film can begreatly reduced and the stability is significantly improved. Furthermore, the invention further provides the corresponding photoelectric devices, such as a perovskite cell, a light-emitting diode anda photoelectric detector, prepared by using the preparation method of the perovskite film. Compared with a standard device to which the small organic molecules of the conjugated pi system are not added, the obtained photoelectric devices have the advantages that the performance and the stability are improved.

The invention discloses an organic solar cell with MXene as an anode modification layer material and a manufacturing method thereof. An organic solar cell device includes an anode substrate, an anodemodification layer, an active layer, a cathode modification layer, and a cathode layer. The MXene with high conductivity, high transmission of light, and a work function matching with ITO is taken asthe anode modification layer material to manufacture the organic solar cell device. Firstly, the MXene has the high conductivity so that the charge transfer efficiency of the organic solar cell can beeffectively increased; secondly, the MXene can effectively adjust and control the work function, and reduce an interfacial ability between an anode and an active layer; and finally, compared with a corresponding PEDOT: PSS device, by using the cell and the method, higher photoelectric conversion efficiency is achieved.

A photoelectric conversion element according to an embodiment of the present disclosure includes a first electrode and a second electrode opposed to each other; and a photoelectric conversion layer provided between the first electrode and the second electrode, and including a first organic semiconductor material and a second semiconductor material that have mutually different mother skeletons, in which the first organic semiconductor material is fullerene or a fullerene derivative, and the second organic semiconductor material has a deeper HOMO level than the first organic semiconductor material.

The invention relates to a composite semiconductor nano material which is prepared by calcining nano titanium dioxide (TiO2) and cobalt phthalocyanine (CoPc) as the raw materials at a temperature of below 500 DEG C. By means of an ultraviolet-visible absorption spectrum, a fluorescence spectrum, thermogravimetric analysis and the like, the CoPc/TiO2 composite semiconductor nano material is characterized, and the photoelectrochemical properties, i.e. an open circuit potential-time (Eoc-t) and a relation (I-t) that a current changes with time, of the composite semiconductor nano material are measured. A result shows that under the condition of visible light induction, when an electrondonating substance, i.e. hydroquinone (HQ), is added, electron transfer can occur and a photocurrent can be generated after a circuit is switched on.

The present disclosure provides CMOS image sensors and fabrication methods thereof. An exemplary fabrication process of a CMOS image sensor includes providing a substrate having a first region and a second region connecting with the first region at a first end of the first region: forming a transfer transistor on surface of the substrate in the second region; forming a first implanting region in the substrate in the first region using a first mask; forming a second implanting region in the first implanting region by, the first implanting region being separated into a third implanting region on the second implanting region and a fourth implanting region under the second implanting region; forming a fifth region in the second region at the first end using a second mask, connecting the third implanting region with the fourth implanting region.

The invention relates to a preparation method of a flame-retardant artificial stone containing nano perovskite oxide MTiO3. The nano perovskite oxide and a metal organic framework ZIF material are jointly added into a ternary polyene ester material (such as talcum powder, quartz and phenolic resin), therefore, the heat resistance and the strength of the artificial stone are improved, the aging time of the artificial stone is shortened, the artificial stone can not be degraded for a long time under the high temperature action, the good flame-retardant effect can be kept, and the loss-on-ignition (LOI) index is significantly increased.

The invention discloses a preparation method and application of a bifunctional electrocatalyst, and belongs to the technical field of electrocatalytic materials. According to the technical scheme, the preparation method is characterized in that an MOF precursor is introduced into a high-conductivity one-dimensional carrier shell layer in situ and then is stably compounded with a metal current collector, then electrochemical in-situ activation is carried out, and finally the OER/HER bifunctional electrocatalyst is prepared. The nano bifunctional electrocatalyst prepared by the invention has a multi-stage assembly structure and a multi-dimensional material composite structure characteristic, is beneficial to improving the electrocatalytic activity of the bifunctional electrocatalyst OER/HER and prolonging the service life of the bifunctional electrocatalyst OER/HER, and has a relatively good application prospect in catalysis of water splitting.

The invention relates to a preparation method of a nanocomposite-modified flame-retardant and corrosion-resisting coating. Nano perovskite oxide and metal-organic framework ZIF materials are jointly added to phyllosilicate, the heat resistance and the corrosion resistance of the coating are remarkably improved, the ageing time of the coating is shortened, and the coating can be non-degradable at the high temperature for a long time and further can keep a better flame retardant effect.

The invention relates to a preparation method of a flame-retardant artificial stone containing nano perovskite oxide. The nano perovskite oxide and a metal organic framework UIO material are jointly added into a ternary polyene ester material (such as talcum powder, quartz and phenolic resin), therefore, the heat resistance and the strength of the artificial stone are improved, the aging time of the artificial stone is shortened, the artificial stone can not be degraded for a long time under the high temperature action, the good flame-retardant effect can be kept, and the loss-on-ignition (LOI) index is significantly increased.

The preparation method comprises the following steps: by taking polyhedral oligomeric silsesquioxane which takes a silicon element as a framework as a precursor, establishing a magnesiothermic reduction reaction process based on a molten salt system, and realizing in-situ conversion of organosiloxane, so as to obtain the nanosheet-shaped silicon-carbon composite material used as the negative electrode material of the lithium ion battery. And thus, the nanosheet-shaped silicon-carbon composite material is obtained. The composite material has excellent cycling stability and lithium storage capacity, the preparation process is simple, the condition is controllable, and the cost is relatively low.