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40results about How to "Improved Charge Injection" patented technology

Pure inorganic perovskite light emitting diode device manufacturing method

The invention provides a pure inorganic perovskite light emitting diode device manufacturing method. The method comprises the following steps: (1) an ITO transparent conductive glass substrate is subjected to standardized cleaning and drying and then pretreatment; (2) the ITO is transferred to a vacuum cavity, and evaporation on a hole injection layer and a transport layer is carried out; (3) a dual source co-evaporation method is adopted, and a pure inorganic CsPbX3 perovskite light emitting layer thin film is formed through evaporation; (4) an infrared thermal radiation device is used to carry out thermal treatment on the CsPbX3 perovskite film; and (5) an electron transport layer, an electron injection layer and a metal cathode are formed through thermal evaporation. The manufacturing process is simple and convenient, the manufacturing difficulty is low, the full vacuum evaporation method is adopted to manufacture the device, the manufacturing is easy, the repeatability is good, and the device performance is stable; and through the dual source co-evaporation manufacturing method, the smoothness and the uniformity of the thin film are improved, replacement of a subject material and an object material is facilitated, the ratio of the two can be changed, and regulation on the position of a light emitting peak is realized.
Owner:SUZHOU UNIV

Method for manufacturing perovskite nanocrystal particle light emitting body where organic ligand is substituted, nanocrystal particle light emitting body manufactured thereby, and light emitting device using same

Provided are a method for manufacturing a perovskite nanocrystal particle light-emitter where an organic ligand is substituted, a light-emitter manufactured thereby, and a light emitting device using the same. A method for manufacturing an organic-inorganic-hybrid perovskite nanocrystal particle light-emitter where an organic ligand is substituted may comprise the steps of: preparing a solution including an organic-inorganic-hybrid perovskite nanocrystal particle light-emitter, wherein the organic-inorganic-hybrid perovskite nanocrystal particle light-emitter comprises an organic-inorganic-hybrid perovskite nanocrystal structure and a plurality of first organic ligands surrounding the organic-inorganic-hybrid perovskite nanocrystal structure; and adding, to the solution, a second organic ligand which is shorter than the first organic ligands or includes a phenyl group or a fluorine group, thereby substitutes the first organic ligands with the second organic ligand. Thus, since energy transfer or charge injection into the nanocrystal structure increases through ligand substitution, it is possible to further increase light emitting efficiency and increase durability and stability by means of a hydrophobic ligand.
Owner:SN DISPLAY CO LTD
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