Coated glass for BIPV decoration

Abstract

The utility model provides coated glass for BIPV (building integrated photovoltaics) decoration, which belongs to the technical field of coated glass and comprises a glass substrate and an offline coating layer. The offline coating layer comprises a bottom dielectric layer, a middle dielectric layer, an absorption layer and an upper dielectric layer which are sequentially laminated; the bottom dielectric layer covers the air surface of the glass substrate; the problems of high-light-transmittance power generation and rich color matching can be simultaneously met, and the influence on the power generation efficiency is reduced as much as possible while the decoration is ensured.

Description

Technical Field

[0001] This utility model belongs to the field of coated glass technology, specifically relating to a coated glass for BIPV decoration. Background Technology

[0002] BIPV, or Building Integrated Photovoltaics (PV stands for Photovoltaic), is a technology that integrates solar power generation (photovoltaic) products into buildings. BIPV differs from BAPV (Building Attached Photovoltaics). BIPV can be divided into two main categories: one is the combination of photovoltaic arrays and buildings, such as photovoltaic roofs; the other is the integration of photovoltaic arrays and buildings, such as photovoltaic curtain walls and photovoltaic skylights.

[0003] In recent years, there has been a growing demand for buildings that not only conserve energy but also make full use of energy. Using photovoltaic (PV) power generation on buildings is an excellent way to reduce fossil fuel consumption. The demand for Building Integrated Photovoltaics (BIPV) is increasing, especially the integration of PV technology with curtain walls, which is becoming a popular design approach.

[0004] Photovoltaic panels made of materials such as silicon wafers, cadmium telluride, and perovskite have dark surfaces, mostly dark gray or black, lacking decorative appeal. For example, Chinese patent CN112838165A discloses a perovskite transparent photovoltaic glass and its preparation method. Although some photovoltaic manufacturers have attempted to add color to the surface, the difference in color compared to conventional curtain wall glass remains significant, greatly affecting the overall appearance of the curtain wall. In existing BIPV integrated curtain walls, the photovoltaic modules are visually prominent, limiting the overall aesthetic appeal of the curtain wall.

[0005] Therefore, if a coated glass for BIPV decoration can be developed and applied to the surface of photovoltaic modules to allow as much solar energy as possible to pass through and reduce power generation loss, and if the color of the coating can be adjusted to match the appearance of the curtain wall glass, the problems of power generation and color matching can be solved simultaneously, thereby meeting the practical requirements of BIPV photovoltaic curtain walls. Summary of the Invention

[0006] To address the aforementioned technical problems, this utility model provides a coated glass for BIPV decoration that can simultaneously meet the requirements of high light transmittance for power generation and rich color matching, filling a market gap.

[0007] The technical solution adopted by this utility model is as follows:

[0008] A BIPV decorative coated glass includes a glass substrate and an offline coating layer; the offline coating layer includes a bottom dielectric layer, an intermediate dielectric layer, an absorber layer, and an upper dielectric layer stacked sequentially; the bottom dielectric layer covers the air surface of the glass substrate.

[0009] The underlying dielectric layer is one or more of the following: a metal nitride layer, a non-metal nitride layer, a metal oxide layer, a non-metal oxide layer, a metal oxynitride layer, and a non-metal oxynitride layer; preferably, it is a Si3N4 layer or a TiO2 layer. x One or more of the following: layer, ZnSnO2 layer.

[0010] The thickness of the bottom dielectric layer ranges from 1 nm to 60 nm.

[0011] The intermediate dielectric layer is one or more of a metal oxide layer, a non-metal oxide layer, or a metal selenide layer; preferably TiO2. x One or more of the following: layer, CeO2 layer, ZnO layer, ZrO2 layer, Y2O3 layer, ZnSe layer, and Nb2O5 layer.

[0012] The thickness of the intermediate dielectric layer ranges from 5 nm to 65 nm.

[0013] The absorption layer is a Ni layer, a Cr layer, a Ti layer, a TiN layer, a NiCr layer, or a NiCrO layer. x Layer or NiCrN x One or more of the layers.

[0014] The thickness of the absorption layer ranges from 0 nm to 25 nm.

[0015] The upper dielectric layer is one or more of the following: a metal nitride layer, a non-metal nitride layer, a metal oxide layer, a non-metal oxide layer, a metal oxynitride layer, and a non-metal oxynitride layer; preferably, it is a Si3N4 layer or a TiO2 layer. x One or more of the following: layer, ZnSnO2 layer.

[0016] The thickness of the upper dielectric layer ranges from 1 nm to 60 nm.

[0017] The glass substrate is a float glass substrate of any color, preferably a clear glass or ultra-clear glass substrate.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] The BIPV decorative coated glass provided by this utility model has an intermediate dielectric layer set on top of the bottom dielectric layer. The intermediate dielectric layer can adjust the color of reflected light and improve the transmittance of solar energy through the interference of light, thereby ensuring the decorative effect while minimizing the impact on power generation efficiency.

[0020] The BIPV decorative coated glass provided by this utility model allows for adjustment of the visible light transmittance between 20% and 87% and the reflectance between 5% and 32% through the combination of film layers of different thicknesses, with further room for upward and downward expansion. Truly practical and widely applicable coated products in various color ranges can be developed according to market needs. The specific transmittance and reflectance ranges can be determined based on the project's appearance design and power generation performance requirements.

[0021] The BIPV decorative coated glass provided by this utility model can adjust the transmittance of visible light by adjusting the thickness of the intermediate dielectric layer and the absorption layer, and develop products that match the colors of most Low-E insulated glass. Even if it is not used for photovoltaic curtain walls, it can be used for conventional curtain wall color matching.

[0022] The coating structure of the BIPV decorative coated glass provided by this utility model is simple. It does not require significant changes to the existing target material sequence on the coating equipment. With slight adjustments, it can be mass-produced, with high production efficiency and stable quality. Furthermore, it can be stored for a long time without being sealed, making it easy to promote and process in different locations. Attached Figure Description

[0023] Figure 1 A structural diagram of the coated glass film layer for BIPV decoration provided by this utility model;

[0024] In the figure, 10 is the glass substrate, 201 is the bottom dielectric layer, 202 is the intermediate dielectric layer, 203 is the absorption layer, and 204 is the top dielectric layer. Detailed Implementation

[0025] The present invention provides a BIPV decorative coated glass, comprising a glass substrate 10 and an offline coating layer; the offline coating layer comprises a bottom dielectric layer 201, an intermediate dielectric layer 202, an absorption layer 203, and an upper dielectric layer 204 stacked sequentially; the bottom dielectric layer 201 covers the air surface of the glass substrate 10.

[0026] The underlying dielectric layer is one or more of the following: a metal nitride layer, a non-metal nitride layer, a metal oxide layer, a non-metal oxide layer, a metal oxynitride layer, and a non-metal oxynitride layer; preferably, it is a Si3N4 layer or a TiO2 layer. x One or more of the following: layer, ZnSnO2 layer; its thickness ranges from 1 nm to 60 nm.

[0027] The intermediate dielectric layer is one or more of a metal oxide layer, a non-metal oxide layer, or a metal selenide layer; preferably TiO2. x One or more of the following: layer, CeO2 layer, ZnO layer, ZrO2 layer, Y2O3 layer, ZnSe layer, and Nb2O5 layer; the thickness ranges from 5 nm to 65 nm.

[0028] The absorption layer is a Ni layer, a Cr layer, a Ti layer, a TiN layer, a NiCr layer, or a NiCrO layer. x Layer or NiCrN x The layer has a thickness ranging from 0 nm to 25 nm.

[0029] The upper dielectric layer is one or more of the following: a metal nitride layer, a non-metal nitride layer, a metal oxide layer, a non-metal oxide layer, a metal oxynitride layer, and a non-metal oxynitride layer; preferably, it is a Si3N4 layer or a TiO2 layer. x One or more of the following: layer, ZnSnO2 layer; its thickness ranges from 1 nm to 60 nm.

[0030] The glass substrate is a float glass substrate of any color, preferably a clear glass or ultra-clear glass substrate.

[0031] The method for preparing the BIPV decorative coated glass includes the following steps:

[0032] (1) The glass substrate is cleaned and dried with deionized water;

[0033] (2) A bottom dielectric layer 201, an intermediate dielectric layer 202, an absorption layer 203, and an upper dielectric layer 204 are sequentially sputtered and deposited on the surface of a glass substrate.

[0034] The present invention will now be described in detail with reference to the embodiments.

[0035] Example 1

[0036] A BIPV decorative coated glass includes a 6mm thick clear glass and an offline coating layer; the offline coating layer includes a 60nm thick Si3N4 layer, a 33nm thick TiO2 layer, and a 57.9nm thick Si3N4 layer stacked sequentially; the Si3N4 layer covers the air surface of the clear glass.

[0037] Example 2

[0038] A BIPV decorative coated glass includes a 6mm thick clear glass and an offline coating layer; the offline coating layer includes a 24.7nm thick Si3N4 layer, an 11.4nm thick TiO2 layer, a 7.7nm thick NiCr layer, and a 23.3nm thick Si3N4 layer stacked sequentially; the Si3N4 layer covers the air surface of the clear glass.

[0039] Example 3

[0040] A BIPV decorative coated glass includes a 6mm thick clear glass and an offline coating layer; the offline coating layer includes a 19.6nm thick Si3N4 layer, a 13.7nm thick TiO2 layer, and a 20.4nm thick Si3N4 layer stacked sequentially; the Si3N4 layer covers the air surface of the clear glass.

[0041] The film layers and their thicknesses of the BIPV decorative coated glass in the above embodiments are shown in Table 1.

[0042] Table 1

[0043] Example 1 Example 2 Example 3 glass substrate 6mm clear glass 6mm clear glass 6mm clear glass Underlying dielectric layer <![CDATA[60nm Si3N4 layer]]> <![CDATA[Si3N4 layer of 24.7 nm]]> <![CDATA[19.6nm Si3N4 layer]]> Intermediate dielectric layer <![CDATA[33nm TiO2 layer]]> <![CDATA[11.4 nm TiO2 layer]]> <![CDATA[13.7nm TiO2 layer]]> Absorption layer / 7.7nm NiCr layer / upper dielectric layer <![CDATA[Si3N4 layer of 57.9 nm]]> <![CDATA[Si3N4 layer of 23.3 nm]]> <![CDATA[Si3N4 layer of 20.4 nm]]>

[0044] The transmittance, reflectance, and appearance color of the BIPV decorative coated glass in the above embodiments are shown in Table 2.

[0045] Table 2

[0046] Transmittance Tr Reflectivity Rg Y Rg a* Rg b* Exterior color Example 1 87.3％ 10.1％ -1.5 -10.2 neutral colors Example 2 51.6％ 7.9％ -2.3 -5.9 Dark gray Example 3 70.7％ 28.5％ -2.9 -4.8 silver gray

[0047] As can be seen from the above embodiments, by adjusting the thickness of each film layer, the appearance color, light transmittance, and reflectance of the coated glass can be freely adjusted, thereby achieving the high light transmittance required by BIPV photovoltaic curtain walls while also taking into account the rich color requirements.

[0048] The above detailed description of a BIPV decorative coated glass with reference to the embodiments is illustrative rather than limiting. Several embodiments can be listed according to the defined scope. Therefore, changes and modifications without departing from the overall concept of this utility model should be within the protection scope of this utility model.

Claims

1. A type of coated glass for BIPV decoration, characterized in that, It includes a glass substrate and an offline coating layer; the offline coating layer includes a bottom dielectric layer, an intermediate dielectric layer, an absorber layer, and an upper dielectric layer stacked sequentially; the bottom dielectric layer covers the air surface of the glass substrate.

2. The coated glass for BIPV decoration according to claim 1, characterized in that, The underlying dielectric layer is one or more of the following: a metal nitride layer, a non-metal nitride layer, a metal oxide layer, a non-metal oxide layer, a metal oxynitride layer, and a non-metal oxynitride layer.

3. The coated glass for BIPV decoration according to claim 1, characterized in that, The thickness of the underlying dielectric layer ranges from 1 nm to 60 nm.

4. The coated glass for BIPV decoration according to claim 1, characterized in that, The intermediate dielectric layer is one or more of the following: a metal oxide layer, a non-metal oxide layer, and a metal selenide layer.

5. The coated glass for BIPV decoration according to claim 1, characterized in that, The thickness of the intermediate dielectric layer ranges from 5 nm to 65 nm.

6. The coated glass for BIPV decoration according to claim 1, characterized in that, The absorption layer is a Ni layer, a Cr layer, a Ti layer, a TiN layer, a NiCr layer, or a NiCrO layer. x Layer or NiCrN x One or more of the layers.

7. The coated glass for BIPV decoration according to claim 1, characterized in that, The thickness of the absorption layer ranges from 0 nm to 25 nm.

8. The coated glass for BIPV decoration according to claim 1, characterized in that, The upper dielectric layer is one or more of the following: a metal nitride layer, a non-metal nitride layer, a metal oxide layer, a non-metal oxide layer, a metal oxynitride layer, and a non-metal oxynitride layer.

9. The coated glass for BIPV decoration according to claim 1, characterized in that, The thickness of the upper dielectric layer ranges from 1 nm to 60 nm.

10. The BIPV decorative coated glass according to claim 1, characterized in that, The glass substrate is a float glass substrate of any color.

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