BIFACIAL DOUBLE GLASS SOLAR MODULE

Abstract

A bifacial double glass solar module including: the upper glass layer, the upper encapsulation layer, the cell layer, the lower encapsulation layer, and the lower glass layer. The upper glass layer, the upper encapsulation layer, the cell layer, the lower encapsulation layer, and the lower glass layer are disposed sequentially from top to bottom. The cell layer includes a plurality of double-sided cells connected in series by a solder strip. The upper glass layer is provided with a first anti-reflection film layer on the upper surface and a first up-conversion thin film layer on the lower surface. The lower glass layer is provided with a second up-conversion thin film layer on the upper surface and a second anti-reflection film layer on the lower surface.

Claims

1. A bifacial solar module, comprising: an upper glass layer; an upper encapsulation layer; a cell layer; a lower encapsulation layer; and a lower glass layer.

2. The bifacial solar module according to claim 1, wherein the upper glass layer, the upper encapsulation layer, the cell layer, the lower encapsulation layer, and the lower glass layer are disposed sequentially from top to bottom.

3. The bifacial solar module according to claim 1, wherein the cell layer comprises a plurality of double-sided cells connected in series by a solder strip.

4. The bifacial solar module according to claim 1, wherein the upper glass layer is provided with a first anti-reflection film layer on the upper surface and a first up-conversion thin film layer on the lower surface.

5. The bifacial solar module according to claim 1, wherein the lower glass layer is provided with a second up-conversion thin film layer on the upper surface and a second anti-reflection film layer on the lower surface.

6. The bifacial solar module according to claim 1, wherein the first anti-reflection film layer and the second anti-reflection film layer are composed of one or more of SiO2, TiO2, SiNx, Al2O3, MgF2, and ZrO2.

7. The bifacial solar module according to claim 1, wherein the first anti-reflection film layer and the second anti-reflection film layer have a thickness of 50 nm to 800 nm.

8. The bifacial solar module according to claim 1, wherein the first up-conversion thin film layer and the second up-conversion thin film layer are composed of a Yb3+, Er3+co-doped fluoride, a Yb3+, Tm3+co-doped fluoride, an Er3+single-doped fluoride, or a Tm3+single-doped fluoride.

9. The bifacial solar module according to claim 1, wherein the first up-conversion thin film layer and the second up-conversion thin film layer are composed of a Yb3+, Er3+co-doped oxide, a Yb3+, Tm3+co-doped oxide, an Er3+single-doped oxide, or a Tm3+single-doped oxide.

10. The bifacial solar module according to claim 1, wherein the first up-conversion thin film layer and the second up-conversion thin film layer have a thickness of 100 nm to 600 nm.

11. The bifacial solar module according to claim 1, wherein the double-sided cell is an N-type double-sided cell or a P-type double-sided cell.

12. The bifacial solar module according to claim 1, wherein the double-sided cell is a whole cell or a sliced cell.

13. An apparatus, comprising: an upper glass layer; an upper encapsulation layer; a cell layer; a lower encapsulation layer; and a lower glass layer, wherein the upper glass layer, the upper encapsulation layer, the cell layer, the lower encapsulation layer, and the lower glass layer are disposed sequentially from top to bottom.

14. The apparatus according to claim 13, wherein the cell layer comprises a plurality of double-sided cells connected in series by a solder strip.

15. The apparatus according to claim 13, wherein the upper glass layer is provided with a first anti-reflection film layer on the upper surface and a first up-conversion thin film layer on the lower surface.

16. The apparatus according to claim 13, the lower glass layer is provided with a second up-conversion thin film layer on the upper surface and a second anti-reflection film layer on the lower surface.

17. The apparatus according to claim 13, wherein the first anti-reflection film layer and the second anti-reflection film layer are composed of one or more of SiO2, TiO2, SiNx, Al2O3, MgF2, and ZrO2.

18. The apparatus according to claim 13, wherein the first up-conversion thin film layer and the second up-conversion thin film layer are composed of a Yb3+, Er3+co-doped fluoride, a Yb3+, Tm3+co-doped fluoride, an Er3+single-doped fluoride, or a Tm3+single-doped fluoride.

19. The apparatus according to claim 13, wherein the first up-conversion thin film layer and the second up-conversion thin film layer are composed of a Yb3+, Er3+co-doped oxide, a Yb3+, Tm3+co-doped oxide, an Er3+single-doped oxide, or a Tm3+single-doped oxide.

20. A method for making a bifacial solar module, the method comprising: applying a lower encapsulation layer on a lower glass layer to make a first module; applying a cell layer on the first module to make a second module; applying an upper encapsulation layer on the second module to make a third module; and applying an upper glass layer on the third module to make a bifacial double glass solar module, wherein the upper glass layer, the upper encapsulation layer, the cell layer, the lower encapsulation layer, and the lower glass layer are disposed sequentially from top to bottom.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings illustrated herein are to provide a further understanding of the disclosed embodiments and constitute a part of the disclosure. Illustrative embodiments of the disclosure and their descriptions are intended to explain the disclosed embodiments rather than unduly limit the embodiments.

[0018] FIG. 1 is a cross-sectional diagram of a bifacial double glass solar module according to some embodiments of the disclosure.

[0019] FIG. 2 is a cross-sectional diagram of an upper glass layer according to some embodiments of the disclosure.

[0020] FIG. 3 is a cross-sectional diagram of a lower glass layer according to some embodiments of the disclosure.

[0021] According to some embodiments of the disclosure, as shown in FIG. 1-3, the layer 1 denotes an upper glass layer; the layer 2 denotes an upper encapsulation layer; the layer 3 denotes a cell layer; the layer 4 denotes a lower encapsulation layer; the layer 5 denotes a lower glass layer; the layer 6 denotes a first anti-reflection film layer; the layer 7 denotes a second anti-reflection film layer, the layer 8 denotes a first up-conversion thin film layer; the layer 9 denotes a second up-conversion thin film layer.

DETAILED DESCRIPTION

[0022] Exemplary embodiments of the disclosure will be described below in more detail with reference to the accompanying drawings. Although the accompanying drawings show exemplary embodiments, it should be understood that the disclosed embodiments may be implemented in various forms and should not be limited by the specific embodiments described herein. Instead, the disclosed embodiments are provided so that the disclosure will be better understood, and the scope of the disclosure can be fully conveyed to a person skilled in the art.

[0023] In some embodiments, as shown in FIG. 1-3, a bifacial double glass solar module can include an upper glass layer 1, an upper encapsulation layer 2, a cell layer 3, a lower encapsulation layer 4, and a lower glass layer 5 disposed sequentially from top to bottom. For example, the cell layer can include a plurality of double-sided cells connected in series by a solder strip. In some embodiments, the upper glass layer 1 can be provided with a first anti-reflection film layer 6 on the upper surface and a first up-conversion thin film layer 8 on the lower surface, and the lower glass layer is provided with a second up-conversion thin film layer 9 on the upper surface and a second anti-reflection film layer 7 on the lower surface.

[0024] In some embodiments, the anti-reflection film layers disposed on the upper surface of the upper glass layer and the lower surface of the lower glass layer can be composed of one or more of SiO2, TiO2, SiNx, Al2O3, MgF2, and ZrO2. For example, the anti-reflection film layer can be a single-layer thin film or a multi-layer thin film. In some embodiments, the anti-reflection film layer can utilize the interference effect produced by different optical thin films to eliminate the reflected light, to improve the light transmittance of the glass to a certain extent, and to increase the utilization rate of the module regarding the incident light on the front side and the reflected light and the scattered light on the back side. Further, for example, the anti-reflection thin film can change the hydrophilicity of the glass surface layer, improve the self-cleaning performance of the glass, reduce the use of a cleaning agent, keeps the glass clean persistently, and improve the conversion efficiency of the module. Furthermore, in some embodiments, the anti-reflection thin film also can improve the acid, alkali and aging resistance, improve the weatherability, protect the glass, and prolong the service life of the module.

[0025] For example, the up-conversion thin film layers disposed on the lower surface of the upper glass layer and the upper surface of the lower glass layer can be composed of a Yb3+, Er3+co-doped fluoride, a Yb3+, Tm3+co-doped fluoride, an Er3+single-doped fluoride, or a Tm3+single-doped fluoride, or a Yb3+, Er3+co-doped oxide, a Yb3+, Tm3+co-doped oxide, an Er3+single-doped oxide, or a Tm3+single-doped oxide. In some embodiments, the up-conversion thin film layer can convert, via the up-conversion process, infrared light that cannot be absorbed by the silicon solar cell into visible light causing a higher response of the cell, thus greatly improving the spectral response of the double-sided cell to the incident light on the front side and the reflected light and the scattered light on the back side, and increasing the photo-generated current of the cell. In addition, for example, since the infrared light in the incident light is converted, the thermal effect brought by the infrared light is greatly reduced, thereby indirectly lowering the temperature of the cell, and ultimately greatly improving the output power and the conversion efficiency of the module.

[0026] The above implementations are merely exemplary implementations employed to explain the principles of the current disclosure, and the current disclosure is not limited thereto. For a person skilled in the art, various changes or improvements can be made according to the above-mentioned content of the current disclosure, according to the prior art and knowledge in the art, and with reference to the basic idea of the current disclosure. Such changes or improvements should fall within the protection scope of the current disclosure.