Conductive Paste Interconnection for Perovskite Solar Modules
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Solution Overview
Problem
The decomposition of perovskite materials during scribing processes in solar cell modules leads to material defects, adversely affecting the lifespan of the modules.
Innovation Solution
A conductive paste composed of 30 wt% to 90 wt% conductive particles, 0.1 wt% to 10 wt% binder, 0.1 wt% to 2 wt% organic amine, and 10 wt% to 50 wt% solvent is used to form a conductive portion and insulating portions, enabling electrical connection and insulation through an etching reaction with perovskite layers, thereby reducing the need for scribing processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If scribing processes (such as laser scribing) are employed to achieve interconnection functionality between solar cell components, then electrical connection between cells is improved, but perovskite materials decompose causing material defects and reduced lifespan
Solution Approach 1:
A conductive paste layer is introduced as an intermediary material between solar cell components to achieve electrical connection without direct laser scribing of perovskite layers. The paste contains conductive particles (silver, aluminum, or carbon) that form conductive pathways, while organic amine components selectively etch perovskite to create insulating portions, thereby mediating the connection process to avoid perovskite decomposition
Solution Approach 2:
The invention changes the physical and chemical parameters of the interconnection approach by using a paste formulation with specific conductive particle concentrations (30-90 wt%), organic amine content (0.1-2 wt%), and solvent ratios. These parameter changes enable the paste to undergo controlled etching reactions with perovskite at lower temperatures, avoiding the high-energy laser scribing that causes decomposition
2Reliability
If multiple scribing processes are employed to achieve interconnection functionality, then electrical connection between components is improved, but the number of manufacturing steps increases and service life is reduced
Solution Approach 1:
The invention merges multiple scribing functions into a single conductive paste application step. The paste simultaneously provides conductive pathways for electrical connection and creates insulating portions through selective etching, eliminating the need for separate scribing processes and reducing manufacturing complexity while maintaining interconnection functionality
Solution Approach 2:
The conductive paste layer performs multiple functions simultaneously: it provides electrical conduction through conductive particles, creates insulation through organic amine etching of perovskite, and enables interconnection between cells. This multi-functionality reduces the number of separate manufacturing steps required
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 conductive paste enhances the service life of solar cell modules by minimizing defects and reducing manufacturing steps while maintaining electrical performance.
Implementation Method 1
An etching reaction is performed with the conductive paste and the underlying perovskite layer to form a 2D perovskite layer and a conductive paste layer
Data Source
Figure 1A~1C
Figure 1D~1E
Figure 1F~1G
AI summary
Provided is a conductive paste (30, 150) including 30 wt% to 90 wt% of a conductive particle, 0.1 wt% to 10 wt% of a binder, 0.1 wt% to 2 wt% of an organic amine, and 10 wt% to 50 wt% of a solvent. A solar cell module (100) and a manufacturing method thereof are also provided.