Transparent Polarizing Solar Window Segmentation
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Solution Overview
Problem
Current solar cells are opaque, limiting their use in applications that require transparency, such as windows, and existing solutions for transparent solar windows are either costly, inefficient in light transmission, or have permanent shading patterns.
Innovation Solution
A transparent solar window comprising parallel strips of optically opaque photovoltaically active material, electrically conductive material, and optically transparent material, with widths proportional to the wavelength of visible light, allowing for light transmission and electricity generation without visible impairment, and featuring a polarizing grid effect.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If solar cells are made opaque to generate electricity efficiently, then energy generation is improved, but transparency is lost which limits application to windows
Solution Approach 1:
The solar cell is segmented into multiple thin layers, each performing specific functions. The active layer is made thin to allow light transmission while maintaining electricity generation capability. This segmentation resolves the contradiction by dividing the cell structure so that different layers handle different functions - some layers generate electricity while others allow light passage.
Solution Approach 2:
Different regions of the solar cell are given different optical properties. The patent employs selective transparency where certain areas or layers are optimized for light absorption while others are optimized for light transmission. This local differentiation allows the cell to simultaneously generate electricity and maintain transparency in specific regions.
2Illumination intensity
If existing transparent solar window solutions use integrated components like dichromatic mirrors and multiple panes, then transparency is achieved, but device complexity and manufacturing cost increase
Solution Approach 1:
The patent merges multiple functions into a single integrated solar cell structure. Instead of using separate components like dichromatic mirrors, multiple glass panes, and external frames, the invention combines light transmission, electricity generation, and structural integrity into one monolithic device. This merging reduces complexity while maintaining transparency performance.
Solution Approach 2:
The solar cell is designed to perform multiple functions simultaneously - generating electricity, allowing light transmission, and serving as a structural window component. This multi-functionality eliminates the need for separate specialized components, reducing overall system complexity while achieving the desired transparency and energy generation.
3Illumination intensity
If thin film solar panels use etched transparent lines for shading, then light transmission is improved, but the shading pattern becomes permanent and non-adjustable
Solution Approach 1:
The patent introduces dynamic control capabilities to the solar window, allowing the shading properties to be adjusted in real-time rather than being fixed. This could involve electrochromic or other adjustable materials that change optical properties based on user preference or environmental conditions, resolving the contradiction between light transmission and adaptability.
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
Enables transparent windows that generate electricity while allowing illumination and viewing, with adjustable shading and energy storage options, offering a practical and efficient dual-functionality for residential and commercial use.
Implementation Method 1
optically opaque photovoltaically active material
Implementation Method 2
The transparent parts of the solar window are parallel and approximately the wavelength of visible light which causes the solar window to be a polarizing grid
Data Source
AI summary
The present disclosure provides a means to build a solar cell that is transparent to and polarizes visible light, and to transfer the energy thus generated to electrical power wires.