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1. (WO2019002525) SUBSTRAT FONCTIONNALISÉ
Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique

CLAIMS

1. A functionalized substrate comprising a substrate (10) and a near infrared absorbing coating (20) having a ratio between the light transmittance and energy transmittance of at least 1.05 on said substrate (10), wherein

said near infrared absorbing coating (20) comprises near infrared absorbing nanoparticles (21) comprising indium, tin, zinc, antimony, aluminum, tungsten or mixtures thereof; and said near infrared absorbing coating (20) comprise at least one of the following near infrared absorbing structures:

[1] near infrared absorbing nanoparticles (21) forming a near infrared absorbing nanoparticle layer and an inorganic overlayer (22) directly on said near infrared absorbing nanoparticle layer;

[2] an inorganic underlayer (23), near infrared absorbing nanoparticles (21) forming a near infrared absorbing nanoparticle layer directly on said inorganic underlayer (23), and an overlayer (22) directly on said near infrared absorbing nanoparticle layer;

[3] near infrared absorbing nanoparticles (21) dispersed within an inorganic encapsulating layer (24); and

[4] near infrared absorbing nanoparticles (21) forming a near infrared absorbing nanoparticle layer.

2. The functionalized substrate according to claim 1, wherein the near infrared absorbing nanoparticles (21) comprise a transparent conductive oxide selected from the group consisting of indium tin oxide, indium zinc oxide, antimony tin oxide, tin zinc oxide, fluorine-doped tin oxide, aluminum-doped zinc oxide, gallium-doped zinc oxide, and optionally doped tungsten oxide.

3. The functionalized substrate according to claim 1, wherein the near infrared absorbing nanoparticles (21) have a core-shell structure with a metallic core (25) and an at least partially oxidized shell (26).

4. The functionalized substrate according to claim 2, wherein the transparent conductive oxide is indium tin oxide.

5. The functionalized substrate according to any one of claims 1 to 4, wherein the near infrared absorbing nanoparticles (21) have a diameter from 100 to 300 nm.

6. The functionalized substrate according to any one of claims 1 to 5, wherein the near infrared absorbing nanoparticles (21) are spaced apart from each other.

7. The functionalized substrate according to any one of claim 1 to 6, wherein the overlayers (22), the underlayer (23) and the encapsulating layer (24) of structures [1], [2] and [3] are based on oxide, nitride or oxynitride materials.

8. The functionalized substrate according to claim 7, wherein the overlayers (22), the underlayer (23) and the encapsulating layer (24) of structures [1], [2] and [3] are based on an oxygen-porous material.

9. The functionalized substrate according to claim 7, wherein the overlayers (22), the underlayer (23) and the encapsulating layer (24) of structures [1], [2] and [3] are based on tin zinc oxide.

10. The functionalized substrate according to any one of claim 1 to 9, wherein the near infrared absorbing nanoparticles (21) have an equivalent theoretical layer thickness from 5 nm to 70 nm.

11. The functionalized substrate according to any one of claim 1 to 10, wherein the near infrared coating (20) has a light absorption of less than 10%.

12. A process for manufacturing a functionalized substrate according to any one of claims 1 to 11 comprising:

providing a substrate (10); and

depositing near infrared absorbing nanoparticles (21) by magnetron sputtering on said substrate;

wherein the step of depositing near infrared absorbing nanoparticles (21) comprises controlled oxidation of metallic clusters.

13. The process according to claim 12, wherein depositing near infrared absorbing nanoparticles comprises (21):

- depositing a metallic cluster layer; and

- controlled oxidation of the metallic cluster layer in the deposition chamber resulting in near infrared absorbing nanoparticles (21).

14. The process according to claim 12, wherein depositing near infrared absorbing nanoparticles (21) comprises:

- depositing metallic clusters; and

- depositing an oxygen-porous inorganic overlay er (22) directly on or simultaneously with said metallic clusters; and

- controlled oxidation of the metallic clusters in a post annealing step resulting in near infrared absorbing nanoparticles.

5. A glazing comprising the functionalized substrate according to any one of claims 1 to 1, wherein the substrate (10) is a glass substrate.