Journal of the Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회논문지)

The Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회)
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Design of Electrode Structure for Reducing Ag Paste for Shingled PV Module Application

Shingled PV 모듈 적용을 위한 Ag Paste 저감 전극 구조 설계

  • Oh, Won Je (Department of Electrical and Computer Engineering, Sungkyunkwan University) ;
  • Park, Ji Su (Department of Electrical and Computer Engineering, Sungkyunkwan University) ;
  • Lee, Jae Hyeong (Department of Electrical and Computer Engineering, Sungkyunkwan University)
  • 오원제 (성균관대학교 전자전기컴퓨터공학과) ;
  • 박지수 (성균관대학교 전자전기컴퓨터공학과) ;
  • 이재형 (성균관대학교 전자전기컴퓨터공학과)
  • Received : 2019.02.18
  • Accepted : 2019.04.01
  • Published : 2019.07.01
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Abstract

A shingled PV module is manufactured by dividing and bonding. In this method, the solar cell is divided by lasers and bonded using electrically conductive adhesives (ECAs). Consequently, the manufacturing cost increases because a process step is added. Therefore, we aim to reduce the production cost by reducing the amount of Ag paste used in the solar cell front. Various electrode structures were designed and simulated. The number of fingers was optimized by designing thinner fingers, and the number of fingers with the maximum power conversion efficiency was confirmed. The simulation confirmed the maximum efficiency in the 4-divided electrode pattern. The amount of Ag paste used for each electrode pattern was calculated and analyzed. The number of fingers was optimized by decreasing the width of the finger; this will not only reduce the amount of Ag paste required but also the increase the efficiency.

Keywords

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Fig. 1. Detailed drawing of divided electrode structure.

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Fig. 2. Change in efficiency according to electrode pattern.

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Fig. 3. Paste cumulative reduction rate with finger width.

Table 1. Input parameters of simulation program.

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Table 2. Comparison of solar cell characteristics.

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Table 3. Results of 4-divided electrode pattern simulation.

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