Perovskite Solar Cell Grid Layout for Single-Step Scribing
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Solution Overview
Problem
Perovskite solar cells have a complex preparation process due to the need for separate scribing steps in the perovskite functional layer and electrode layer, which can lead to increased series resistance and poor stability.
Innovation Solution
A solar cell design with a conductive layer, grid line layer, perovskite functional layer, and electrode layer, where the grid line layer facilitates electrical connection between the conductive and electrode layers, allowing a single scribing step to penetrate both layers, simplifying the preparation process and reducing series resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If separate scribing steps are used for the perovskite functional layer and electrode layer, then the preparation process can be completed, but the process complexity increases and series resistance increases
Solution Approach 1:
The patent combines the scribing of the perovskite functional layer and electrode layer into a single scribing step by designing the grid line layer with through-holes that align with the channels. This allows one scribing operation to simultaneously create channels in the perovskite layer and expose electrode contact points through the grid line layer, reducing process complexity while maintaining electrical connection integrity.
Solution Approach 2:
The grid line layer is designed in advance with through-holes positioned to align with the channel locations. This preliminary structural arrangement enables the subsequent single scribing step to effectively penetrate both layers at the correct positions, simplifying the manufacturing process by pre-establishing the geometric relationships needed for successful integration.
2Ease of manufacture
If separate scribing steps are used for the perovskite functional layer and electrode layer, then the preparation process can be completed, but the series resistance increases
Solution Approach 1:
By merging the scribing operations into a single step that simultaneously processes both the perovskite functional layer and electrode layer, the patent ensures precise alignment between channels and electrode contact points. This reduces the number of alignment operations and minimizes the risk of misalignment that would increase series resistance, while still achieving complete preparation of both layers.
3Manufacturing precision
If multiple scribing steps are used, then each layer can be processed separately, but the preparation time increases
Solution Approach 1:
The patent merges multiple scribing steps into a single operation by designing the grid line layer with through-holes that align with channel positions. This allows one scribing process to simultaneously create channels in the perovskite layer and expose electrode contact points, maintaining manufacturing precision through pre-designed alignment while significantly improving preparation efficiency by reducing the number of steps.
4Productivity
If a grid line layer with through-holes is used, then a single scribing step can penetrate both layers, but the structural complexity increases
Solution Approach 1:
The grid line layer is segmented with through-holes at specific positions to allow laser penetration. This segmentation creates discrete access points that enable the single scribing step to reach the electrode layer through predetermined channels, achieving high preparation efficiency while managing structural complexity through functional segmentation rather than continuous structure.
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 simplified preparation process enhances the stability and efficiency of perovskite solar cells by eliminating the need for separate scribing steps and reducing series resistance.
Implementation Method 1
Perovskite solar cells refer to cells that use perovskite materials as the light-absorbing layer. Due to the significant performance advantages of perovskite materials, such as high light absorption coefficient, carrier mobility, and direct and tunable optical bandgap
Data Source
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AI summary
The present application provides a solar cell, a preparation method thereof, and an electric apparatus. The solar cell includes a substrate, a conductive layer, a grid line layer, a perovskite functional layer, and an electrode layer, where the conductive layer includes conductive portions with a first gap between the conductive portions, the grid line layer includes a plurality of grid lines, the perovskite functional layer includes functional portions with a second gap between the functional portions, each grid line is located between the first gap and the second gap that are adjacent to each other, the electrode layer includes a plurality of electrodes, and the electrodes are electrically connected to the grid lines.