Semi-Transparent Organic Photovoltaic Cells for Agrivoltaics
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current solar panel deployment on farmland limits agricultural productivity as they either obstruct crop growth or require significant land reservation, necessitating a solution that allows simultaneous power generation and agriculture without compromising either.
Innovation Solution
Development of semi-transparent organic photovoltaic (OPV) cells that absorb light in spectral ranges not utilized by plants, allowing visible light to be transmitted for plant growth while generating electricity, with adjustable optical properties to optimize both energy production and plant growth.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If traditional solar panels are deployed on farmland, then electricity generation is achieved, but agricultural productivity is reduced due to obstruction of crop growth
Solution Approach 1:
The solar panel is segmented into multiple layers with distinct functions: the active layer absorbs specific spectral ranges for electricity generation, while the semi-transparent structure allows visible light transmission for plant growth. This segmentation enables simultaneous power generation and agriculture by dividing the light spectrum into utilized and transmitted portions.
Solution Approach 2:
The solar panel employs local quality by having different optical properties at different spectral ranges. It absorbs light in specific wavelength ranges (e.g., UV, near-infrared) while remaining transparent in the visible range where plants perform photosynthesis. This spectral-selective transparency allows the same surface to serve dual purposes: power generation and crop cultivation.
2Power
If solar panels are made opaque to maximize light absorption for power generation, then energy conversion efficiency is improved, but light transmission for plant growth is blocked
Solution Approach 1:
The solar panel utilizes parameter changes by adjusting its optical transmission properties across different wavelength ranges. By modifying the active layer composition and thickness, the panel achieves high absorption efficiency in non-photosynthetic spectral ranges while maintaining high transparency in the visible range, thus optimizing both power generation and light transmission for plant growth.
Solution Approach 2:
The solar panel employs composite materials combining organic photovoltaic compounds with semi-transparent structures. This composite design enables selective light absorption where the organic materials convert specific wavelengths to electricity while allowing other wavelengths to pass through, achieving both high energy conversion efficiency and sufficient light transmission for agriculture.
3Power
If land is reserved for solar power generation, then electricity production is ensured, but available farmland for agriculture is reduced
Solution Approach 1:
The solar panel achieves universality by serving multiple functions simultaneously: it generates electricity and allows crop growth underneath. This multi-functionality eliminates the need to choose between land use for power generation or agriculture, as the same surface area performs both roles, thereby preserving farmland while ensuring electricity production.
4Productivity
If semi-transparent OPV cells are designed to transmit visible light for plant growth, then agricultural compatibility is improved, but power conversion efficiency may be reduced
Solution Approach 1:
The solar panel applies partial action by absorbing only the portions of the light spectrum that are not needed for photosynthesis. Rather than absorbing all light to maximize power conversion, it selectively absorbs UV and near-infrared wavelengths while transmitting visible light, achieving sufficient power generation without compromising agricultural compatibility.
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 the use of the same area for both electricity generation and plant growth, enhancing agricultural productivity and reducing land use conflicts, with the potential to turn farming into a carbon-neutral industry.
Implementation Method 1
an active layer between the electrodes, comprising a combination of donor and acceptor molecules which are configured absorb light in one or more sub-spectral ranges
Data Source
AI summary
A transparent organic photovoltaic cell comprises first and second electrodes, and an active layer between the electrodes, comprising a combination of donor and acceptor molecules which are configured absorb light in one or more sub-spectral ranges within a total spectral range of 400 nm to 2000 nm, wherein the photovoltaic cell is configured to be placed in optical communication with a plants such that at least a portion of light not absorbed by the photovoltaic cells is transmitted to the plant.