A multilayer optically coupled BIPV system based on spectral hierarchical utilization

Abstract

This invention discloses a multi-layer optically coupled BIPV system based on spectral hierarchical utilization, belonging to the field of building-integrated photovoltaics (BIPV) technology. It comprises, from top to bottom, an aesthetic glass layer, a transparent display layer, a down-conversion layer, and a solar cell layer. The aesthetic glass layer uses alternating deposition of multiple transparent dielectric films with different refractive indices on a substrate glass to reflect specific visible light, creating a colored appearance while simultaneously allowing high transmission of other sunlight. The transparent display layer employs an array of luminescent pixels to achieve high-definition display and utilizes interface reflection for secondary light recovery. The down-conversion layer, through a scientific ratio of fluorescent and quantum dot materials, efficiently converts UV and some blue light into yellow-green and red light easily absorbed by the solar cells, improving light energy utilization. The solar cell layer absorbs multi-band light to achieve photoelectric conversion. This invention, through spectral hierarchical design and multi-layer structure coupling, achieves a synergistic unity of high-efficiency power generation, architectural aesthetics, and multifunctional display, enhancing the architectural application value and market competitiveness of photovoltaic modules.

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