Printed Solar Module Transparency for Power and Visibility
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Solution Overview
Problem
Existing solar cell modules lack excellent design properties and power generation performance, particularly when printing is performed on the light-receiving surface side, which affects visibility and efficiency.
Innovation Solution
A solar cell module design with a print layer formed further toward the light-receiving surface side, utilizing specific transparencies and colors, ensuring conditions such as spectral sensitivity integral ratios are met to maintain a short circuit current ratio of 0.6 or more, allowing for visibility through the rear surface and enhancing design properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If printing is performed on the light-receiving surface side of the solar cell module, then design properties are improved, but power generation performance deteriorates
Solution Approach 1:
The patent applies parameter changes by precisely controlling the transparency of the print layer and positioning it at specific distances from the light-receiving surface. By adjusting these parameters, the design properties are enhanced while the power generation performance is maintained at 60% or more of the reference value without printing.
Solution Approach 2:
The patent moves the print layer from the traditional rear surface position to a position in front of the light-receiving surface, creating a new spatial dimension for design expression. This dimensional change allows the print layer to serve both aesthetic and functional purposes simultaneously.
2Illumination intensity
If printing is performed with high transparency to maintain power generation performance, then visibility through the rear surface is improved, but design properties deteriorate
Solution Approach 1:
The patent optimizes the transparency parameter of the print layer to achieve a balance between visibility and design expression. By carefully selecting transparency values and positioning the print layer at specific distances, both visibility through the rear surface and design properties are simultaneously improved.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution achieves excellent design properties with visibility through the rear surface while maintaining high power generation performance, even with whole surface printing, by setting specific transparency conditions for the print layer.
Implementation Method 1
a print layer formed further toward a light-receiving surface side than a solar cell module body by printing with a specific transparency
Implementation Method 2
a solar cell module body; and a print layer formed further toward a light-receiving surface side than the solar cell module body
Data Source
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AI summary
A solar cell module includes: a solar cell module body; and a print layer formed further toward a light-receiving surface side than the solar cell module body by printing with specific transparency in a specific region, wherein a rear surface side is visible from the light-receiving surface side in at least part of the specific region, and the specific transparency is set to satisfy a condition A. The condition A is that spectral sensitivity integral ratio A defined by formula (1) is not less than a specific value A* that the spectral sensitivity integral ratio A takes when printing is performed with transparency resulting in a short circuit current ratio of 0.6. λ is wavelength (nm), f(λ) is quantum efficiency IPCE (%) in a case in which the print layer is formed, and fSC(λ) is quantum efficiency IPCE (%) in a case in which the print layer is not formed. [numerical 1] A=∫360830fλdλ∫360830fSCλdλ