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June 27, 2026Solar Energy Materials and Solar CellsOpen Access

Laser enhanced contact optimization on rear-junction double-side TOPCon solar cells: Detailed analysis of Metal-Si contact properties and interfacial microstructures

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Authors

WCWookjin ChoiYOYoung‐Woo OkKMKwan Hong Min

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Overview

Randomized trial investigates laser-enhanced contact optimization effects on efficiency in solar cells, suggesting significant improvements.

Key Points

  • This research aims to analyze the impact of laser-enhanced contact optimization on the performance of DS-TOPCon solar cells by evaluating contact properties and interfacial microstructures.
  • Investigated the effects of firing temperature and laser-enhanced contact optimization on n-TOPCon and p-TOPCon layers.
  • Measured contact resistivity and open-circuit voltage of solar cells under various conditions.
  • Performed microstructural analysis to assess changes in crystallites and contact formation.
  • Achieved low contact resistivity values of ≈0.4 mΩ-cm² for n-TOPCon and ≈2.6 mΩ-cm² for p-TOPCon layers.
  • Observations indicate a degradation of open-circuit voltage by ≈5 mV due to increased recombination.
  • The end result shows a fabrication of 23.2%-efficient rear-junction DS-TOPCon solar cells with potential simulation projections to exceed 26% efficiency.

Cite This Study

Choi et al. (2026) studied this question.

synapsesocial.com/papers/6a3f6772aea7db3c1953ef07https://doi.org/10.1016/j.solmat.2026.114483
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  5. 5In Situ Electrothermal Heating Reveals the Mechanism of Laser‐Enhanced Front Contacts in TOPCon Solar Cells2026