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 Optimization of the Front Side in n-Type TOPCon Solar Cell

  • Jeong, Sungjin (Department of Electrical and Computer Engineering, Sungkyunkwan University) ;
  • Kim, Hongrae (Department of Electrical and Computer Engineering, Sungkyunkwan University) ;
  • Kim, Sungheon (Interdisciplinary Program in Photovoltaic System Engineering, Sungkyunkwan University) ;
  • Dhungel, Suresh Kumar (College of Information and Communication Engineering, Sungkyunkwan University) ;
  • Kim, Youngkuk (College of Information and Communication Engineering, Sungkyunkwan University) ;
  • Yi, Junsin (College of Information and Communication Engineering, Sungkyunkwan University)
  • Received : 2022.09.01
  • Accepted : 2022.09.08
  • Published : 2022.11.01
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Abstract

Numerical simulation is a good way to predict the conversion efficiency of solar cells without a direct experimentation and to achieve low cost and high efficiency through optimizing each step of solar cell fabrication. TOPCon industrial solar cells fabricated with n-type silicon wafers on a larger area have achieved a higher efficiency than p-type TOPCon solar cells. Electrical and optical losses of the front surface are the main factors limiting the efficiency of the solar cell. In this work, an optimization of boron-doped emitter surface and front electrodes through numerical simulation using "Griddler" is reported. Through the analysis of the results of simulation, it was confirmed that the emitter sheet resistance of 150 Ω/sq along the front electrodes having a finger width of 20 ㎛, and the number of finger lines ~130 for silicon wafer of M6 size is an optimized technology for the front emitter surface of the n-type TOPCon solar cells that can be developed.

Keywords

Acknowledgement

This work was supported by the Technology Innovation Program (or Industrial Strategic Technology Development Program) (20016058) funded By the Ministry of Trade, Industry & Energy(MOTIE, Korea) and the SungKyunKwan University and the BK21 FOUR(Graduate School Innovation) funded by the Ministry of Education (MOE, Korea) and National Research Foundation of Korea(NRF).

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