Conductive Paste Composite Glass Frit Solar Cell Efficiency
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Solution Overview
Problem
Current conductive pastes for solar cells do not adequately provide good ohmic contact for the front silver electrode, leading to suboptimal fill factor and conversion efficiency.
Innovation Solution
A conductive paste comprising silver powder, a composite glass frit with a specific ratio of lead oxides and silicon oxides, and another with tellurium oxides and zinc oxides, along with optional additives, is used to form a front electrode, enhancing the solar cell's photoelectric conversion efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If single-component glass frit paste is used, then the manufacturing process is simple, but the conversion efficiency and ohmic contact quality are insufficient
Solution Approach 1:
The patent applies composite materials by combining two different types of glass frits (first type and second type) with specific component ratios to create a conductive paste that achieves both good ohmic contact and high conversion efficiency, resolving the contradiction between manufacturing simplicity and performance reliability
2Device complexity
If single-component glass frit paste is used, then the paste composition is simple, but the fill factor and ohmic contact quality are suboptimal
Solution Approach 1:
The patent uses a composite glass frit system with two distinct types containing different oxide components in specific weight ratios, which improves ohmic contact quality and fill factor while maintaining controlled paste composition complexity through defined formulation parameters
3Reliability
If composite glass frit with specific ratios is used, then conversion efficiency is enhanced, but the paste formulation becomes more complex
Solution Approach 1:
The patent optimizes the weight ratio parameters of the two glass frit types and their respective oxide components to achieve enhanced conversion efficiency. By carefully controlling these compositional parameters within specific ranges, the patent improves performance while managing formulation complexity through systematic parameter optimization
Data Source
AI summary
The present invention relates to a conductive paste and a method for producing solar cell by using the same. The conductive paste comprises at least silver powders and a composite glass frit comprising a first type of glass frit containing lead oxides and silicon oxides and a second type of glass frit containing tellurium oxides and zinc oxides wherein the first type of glass frit and the second type of glass frit are in a weight ratio of 93:7 to 44:56.