Tandem Solar Cell Gap Filter for Uniform Silicon Power Output
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Solution Overview
Problem
The use of silicon and perovskite solar cells with different cell sizes in tandem can lead to uneven power generation and reduced efficiency due to intense light reaching silicon devices through gaps between perovskite devices, causing heat generation and temperature rise.
Innovation Solution
A translucent filter is provided in the gaps between perovskite devices to block light in the wavelength band absorbed by perovskite devices, preventing excessive light from reaching silicon devices on the lower side.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If perovskite solar cells with larger area are used to improve light receiving efficiency, then area efficiency for receiving light is improved, but uneven power generation occurs among silicon devices due to intense light reaching through gaps between perovskite devices
Solution Approach 1:
A translucent filter is introduced as an intermediary component in the gaps between perovskite devices. This filter selectively blocks intense light in the wavelength band absorbed by perovskite devices while allowing other wavelengths to pass through, thereby preventing uneven power generation in silicon devices without compromising the large area efficiency of the perovskite cells
2Adaptability or versatility
If perovskite and silicon solar cells with different cell sizes are used in tandem, then wavelength band absorption is widened, but the numbers and positions of upper and lower solar cells differ causing silicon devices to be disposed on lower side of gaps
Solution Approach 1:
The translucent filter is selectively placed only in the gaps between perovskite devices where light intensity issues occur, rather than uniformly across the entire structure. This localized approach addresses the specific problem area while maintaining the overall tandem structure's wavelength absorption capabilities
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
Suppresses uneven power generation among silicon devices, maintaining power generation efficiency by blocking light that would otherwise cause heat generation.
Implementation Method 1
a translucent filter that blocks light in a wavelength band absorbed in the perovskite devices is provided in the gap between the perovskite devices
Implementation Method 2
light in a short wavelength band be absorbed in the perovskite solar cell disposed on an upper side to generate electric power
Implementation Method 3
light in a long wavelength band be absorbed in the silicon solar cell disposed on a lower side to generate electric power
Data Source
AI summary
Provided is a tandem solar cell capable of suppressing uneven power generation among silicon devices disposed on a lower side of perovskite devices. The tandem solar cell includes a plurality of perovskite devices disposed on a front surface side of a plurality of silicon devices, at least part of the plurality of silicon devices being disposed on a back surface side of a gap between the perovskite devices or light passing through the gap between the perovskite devices from the front surface side to the back surface side reaching the at least part of the plurality of silicon devices, in which a translucent filter that blocks light in a wavelength band absorbed in the perovskite devices is provided in the gap between the perovskite devices.