A kind of cdse/cds nanorod, polarizing film and preparation method thereof

A polarizing film and nanorod technology, applied in the field of quantum dots, can solve problems such as energy loss and complex stacking structure, achieve high quantum yield, high luminous efficiency, and realize the effect of light output

Active Publication Date: 2020-06-23
TCL CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of the above-mentioned deficiencies in the prior art, the object of the present invention is to provide a CdSe / CdS nanorod, a polarizing film and a preparation method thereof, aiming at solving the problem that existing quantum dot TVs still use polarizers, liquid crystals and filters to control Light output, such a stack structure is not only complicated but also causes a lot of energy loss

Method used

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  • A kind of cdse/cds nanorod, polarizing film and preparation method thereof
  • A kind of cdse/cds nanorod, polarizing film and preparation method thereof
  • A kind of cdse/cds nanorod, polarizing film and preparation method thereof

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Effect test

Embodiment 1

[0072] 1. Preparation of CdSe / CdS core-shell nanorods:

[0073] (1) Preparation of CdSe seed crystal: 60 mg of cadmium oxide (CdO), 2.8 g of trioctylamine (Trioctylamine, TOA), 1.2 g of oleic acid (Oleic acid, OA) were mixed and stirred evenly in a 50 mL three-necked flask , heated to 170 °C under vacuum and degassed for 1 h. Under Ar atmosphere, the solution was heated to 300°C to fully dissolve cadmium oxide to form a colorless and transparent solution. Subsequently, 1.5 g of trioctylphosphine (Trioctylphosphine, TOP) was quickly injected into the flask, and the temperature of the solution decreased slightly. When the temperature of the solution rose to 300 °C, a mixed solution of 40 mg Se and 2 mL TOP was injected into the flask, and the reaction was maintained at 300 °C for 5 min. After the reaction was completed, the solution was cooled to 100 °C and poured into a centrifuge tube, ethyl acetate and methanol were added to precipitate it, and the precipitate was taken out...

Embodiment 2

[0078] 1. Preparation of CdSe / CdS core-shell nanorods:

[0079] (1) Preparation of CdSe seed crystal: 128.4 mg of cadmium oxide (Cadmium oxide, CdO), 3.53 g of trioctylamine (Trioctylamine, TOA), 2.06 g of oleic acid (Oleic acid, OA) were mixed and stirred evenly in a 50 mL three-necked flask , heated to 170 °C under vacuum and degassed for 1 h. Under Ar atmosphere, the solution was heated to 300°C to fully dissolve cadmium oxide to form a colorless and transparent solution. Subsequently, 1.5 g of trioctylphosphine (Trioctylphosphine, TOP) was quickly injected into the flask, and the temperature of the solution decreased slightly. When the temperature of the solution rose to 320 °C, a mixed solution of 79 mg Se and 2 mL TOP was injected into the flask, and the reaction was maintained at 320 °C for 5 min. After the reaction was completed, the solution was cooled to 100 °C and poured into a centrifuge tube, ethyl acetate and methanol were added to precipitate it, and the preci...

Embodiment 3

[0084] 1. A preparation method of CdSe / CdS nanorods:

[0085] Add cadmium oxide, trioctylamine and oleic acid into the flask at a ratio of 1:5:2 by molar ratio, stir evenly, vacuumize at 160°C for 50 minutes, and then heat to 300°C in an Ar gas environment to oxidize The cadmium is fully dissolved to obtain a colorless transparent solution; the mixed solution of selenium powder and TOP is added to the colorless transparent solution, and the reaction is carried out at 280° C. for 4 minutes to obtain an intermediate mixed solution; the intermediate mixed solution is cooled to Pour it into a centrifuge tube after 80°C, add ethyl acetate and methanol to precipitate it, take out the precipitate, add toluene and methanol and centrifuge once to obtain CdSe seed crystals, and dissolve the CdSe seed crystals in TOP solution to obtain CdSe seed crystal solution, set aside; dissolving S powder in TOP solution to obtain S-TOP solution, then adding the S-TOP solution into the CdSe seed sol...

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Abstract

The invention discloses a CdSe / CdS nano-rod, a polarized thin film and a preparation method thereof. The preparation method of the polarized thin film comprises the following steps: preparing a CdSe / CdS nano-rod solution in advance, and coating the CdSe / CdS nano-rod solution on an ITO (Indium Tin Oxide) glass substrate in a spinning manner by adopting a homogenizer; and finally, putting a spin-coated sample into a vacuum drying box and drying to prepare the polarized thin film. The prepared polarized thin film based on the CdSe / CdS nano-rod has the advantages of high quantum yield, high light emitting efficiency, good stability and the like, and transition dipoles of the CdSe / CdS nano-rod are arrayed along the long axis of the nano-rod and light can generate polarized emission, so that the polarized thin film can be used as a relatively good polarization light source; the polarized thin film based on the CdSe / CdS nano-rod, provided by the invention, is used as a backlight source, so that a quantum dot television can effectively realize light output; and the output of the light does not need to be controlled by a polaroid so that energy loss is avoided and a backlight source assembly structure is simplified.

Description

technical field [0001] The invention relates to the technical field of quantum dots, in particular to a CdSe / CdS nanorod, a polarizing film and a preparation method thereof. Background technique [0002] Because liquid crystal display technology has the advantages of producing large pictures, occupying less space, low energy consumption, flat right-angle display, stable and non-flickering images, etc., it has gradually replaced cathode tube technology. Liquid crystal display technology uses a backlight source, and at the same time uses polarizers, liquid crystals and filters to stack to achieve light output. Among them, the polarizer is used to adjust the vibration direction of light, and the filter is used to filter the white light backlight to produce other colors. However, such a liquid crystal stack structure will generate a lot of heat and cause energy loss. [0003] In recent years, quantum dots have become a new generation of display materials with great application ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B5/30H01L33/58
CPCG02B5/3041H01L33/58
Inventor 覃辉军刘政杨一行
Owner TCL CORPORATION
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