Quantum dot composite film and preparation method thereof
A technology of quantum dots and composite films, which is applied in the direction of chemical instruments and methods, luminescent materials, etc., can solve the problems of unsatisfactory market applications, quantum dot film failure, optical performance degradation, etc., and achieve low sensitivity to factors such as water and oxygen and low cost. Low, mild condition effects
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preparation example Construction
[0032] The application also provides a method for preparing a quantum dot composite film, comprising the steps of:
[0033] S1, providing a quantum dot-hydrogel layer;
[0034] S2. Coating the silylating agent on the surface of the quantum dot-hydrogel layer;
[0035] S3. After placing the coated quantum dot-hydrogel layer for a period of time, a layer containing SiO is formed on the surface of the quantum dot-hydrogel layer. 2 And / or a water blocking layer of polysiloxane to obtain the quantum dot composite film.
[0036] In the present application, the silylating agent relies on the moisture in the air or in an environment with a certain humidity, or the moisture lost from the hydrogel layer, to perform a hydrolysis reaction to obtain a SiO-containing 2 And / or a water-blocking layer of polysiloxane and wrapped on the surface of the quantum dot-hydrogel layer, making it difficult for water vapor and oxygen in the external environment to penetrate from the outside to the ins...
Embodiment approach
[0055] According to a preferred embodiment of the present application, the quantum dots are selected from group IIB-VIA, group IIIA-VA, group IVA-VIA, group IB-IIIA-VIA, group IIB-IVA-VIA, group IIA-IVB-VA, VIII-VIA group single or composite structure quantum dots, or at least one of perovskite quantum dots. However, exemplary embodiments of the present application are not limited thereto.
[0056] In a specific embodiment, the quantum dots are selected from CdSe, CdTe, ZnS, ZnSe, ZnTe, ZnO, HgS, HgSe, HgTe, MgSe, MgS, CdSeS, CdSeTe, CdSTe, ZnSeS, ZnSeTe, ZnSTe, HgSeS, HgSeTe, HgSTe、CdZnS、CdZnSe、CdZnTe、CdHgS、CdHgSe、CdHgTe、HgZnS、HgZnSe、HgZnTe、MgZnSe、MgZnS、HgZnTeS、CdZnSeS、CdZnSeTe、CdZnSTe、CdHgSeS、CdHgSeTe、CdHgSTe、HgZnSeS、HgZnSeTe、HgZnSTe、GaN、GaP、GaAs、 GaSb, AlN, AlP, AlAs, AlSb, InN, InP, InAs, InSb, GaNP, GaNAs, GaNSb, GaPAs, GaPSb, AlNP, AlNAs, AlNSb, AlPAs, AlPSb, InNP, InNAs, InNSb, InPAs, InPSb, GaAlNP, GaAlNAs, GaAlNSb, GaAlPAs, GaAlPSb, GaInNP, GaInNAs, GaInNSb, GaInPAs...
Embodiment 1
[0072] Quantum dot composite film 1:
[0073] Includes: CH 3 NH 3 PbBr 3 Perovskite quantum dot-alginate layer; and
[0074] coated in CH 3 NH 3 PbBr 3 Perovskite quantum dots-containing SiO on the surface of alginate layer 2 of water blocking layer.
[0075] Preparation of quantum dot composite film 1:
[0076] S1, the CH 3 NH 3 PbBr 3 Mix perovskite quantum dots, chloroform, and sodium alginate evenly and stir to obtain CH 3 NH 3 PbBr 3 Perovskite quantum dots-sodium alginate hybrid system;
[0077] Among them, the mass of sodium alginate accounted for CH 3 NH 3 PbBr 3 20% of the mass of the perovskite quantum dot-sodium alginate hybrid system.
[0078] S2, the CH 3 NH 3 PbBr 3 The perovskite quantum dot-sodium alginate hybrid system is coated on the substrate material, and the coated substrate material is cured to obtain the cured CH 3 NH 3 PbBr 3 Perovskite quantum dots-sodium alginate mixture;
[0079] S3, make the cured CH 3 NH 3 PbBr 3 Separa...
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