A Theoretical Solution for Analyzing Bi-Layer Structures with Differing Thermal Properties

Area of Science:

• Materials Science
• Solid Mechanics
• Energy Science

Background:

• Solar cells are susceptible to interfacial fracture due to thermal property mismatches between layers.
• Understanding stress distribution is crucial for improving solar module durability and performance.

Purpose of the Study:

• To develop a simplified model for analyzing interfacial fracture in bi-layer laminated solar cells.
• To identify critical stress points and understand their governing parameters.

Main Methods:

• Utilized Hilbert-Riemann theory for model development.
• Analyzed interfacial normal stress distributions.
• Validated predictions using finite element simulations.

Main Results:

• Identified critical stress points influenced by thermal expansion coefficient and elastic modulus mismatch.
• Determined that stress critical point position depends on ratios of thermal expansion coefficients and elastic moduli.
• Validated model predictions with finite element analysis.

Conclusions:

• The simplified model provides an efficient approach for predicting thermal stress in laminated solar cells.
• Findings offer practical insights for designing and fabricating robust solar modules.