Scholarlink

<p>Silicon heterojunction (HJT) solar cells offer high efficiency, but conventional silver (Ag) screen-printed metallization increases cost and supply risk. Silver-coated copper (Ag-coated Cu) pastes can reduce Ag consumption while retaining low-temperature processing, yet their stability and performance recovery under realistic stresses are not well established. In this work, Ag-coated Cu paste-metallized HJT solar cells were degraded under combined illumination (0.2-1.0 sun) and elevated temperature (45–85&#xa0;°C) at varied light intensities and then regenerated by square-wave AC injection (500&#xa0;kHz, 1.4 V<sub>pp</sub>) through the contacts. Degradation proceeds through (i) fast, reversible interfacial transients, (ii) diffusion-limited losses consistent with metastable hydrogen-related recombination centers, and (iii) an irreversible component at the most severe conditions. Under electrical regeneration for 1024&#xa0;min at room temperature, j<sub>sc</sub> and V<sub>oc</sub> were almost completely restored (99.80% and 99.98%, respectively), while the FF recovered partially to 96.75%, resulting in an overall efficiency recovery of 96.5%. The results show AC regeneration can mitigate metastability-driven losses, whereas contact-related resistance remains a key limitation. Future work will optimize waveform parameters and extend validation to mini-modules with complementary defect spectroscopy.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Stability recovery of ag-coated Cu metallized silicon heterojunction solar cells under light and heat stress using AC electrical regeneration

  • 期刊论文

  • 发表日期：

    2026年6月30日

查看全文
  • Maha Nur Aida,
  • Hasnain Yousuf,
  • Mengmeng Chu,
  • Rafi Ur Rahman,
  • Shurouq Abdulqadir Mohammed,
  • Hyejeong Jin,
  • Sangho Kim,
  • Minkyu Ju,
  • Eunchel Cho,
  • Muhammad Quddamah Khokhar,
  • Junsin Yi

摘要

Silicon heterojunction (HJT) solar cells offer high efficiency, but conventional silver (Ag) screen-printed metallization increases cost and supply risk. Silver-coated copper (Ag-coated Cu) pastes can reduce Ag consumption while retaining low-temperature processing, yet their stability and performance recovery under realistic stresses are not well established. In this work, Ag-coated Cu paste-metallized HJT solar cells were degraded under combined illumination (0.2-1.0 sun) and elevated temperature (45–85 °C) at varied light intensities and then regenerated by square-wave AC injection (500 kHz, 1.4 Vpp) through the contacts. Degradation proceeds through (i) fast, reversible interfacial transients, (ii) diffusion-limited losses consistent with metastable hydrogen-related recombination centers, and (iii) an irreversible component at the most severe conditions. Under electrical regeneration for 1024 min at room temperature, jsc and Voc were almost completely restored (99.80% and 99.98%, respectively), while the FF recovered partially to 96.75%, resulting in an overall efficiency recovery of 96.5%. The results show AC regeneration can mitigate metastability-driven losses, whereas contact-related resistance remains a key limitation. Future work will optimize waveform parameters and extend validation to mini-modules with complementary defect spectroscopy.