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

Qianhua Peng1, Siyuan Zhou2, Yan Shi1

  • 1State Key Laboratory of Mechanics and Control for Aerospace Structures, Nanjing University of Aeronautics & Astronautics, Nanjing 210016, China.

Micromachines
|December 31, 2025
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Summary
This summary is machine-generated.

This study presents a simplified model for interfacial fracture in solar cells, identifying critical stress points due to thermal expansion mismatch. Results guide the design of more durable laminated solar modules.

Keywords:
simplified modelsolar celltheoretical solutionthermal load

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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.