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2018 Vol.38, Issue 1 Preview Page
Analysis of Output Characteristics of Lead-free Ribbon based PV Module Using Conductive Paste

전도성 페이스트를 이용한 무연 리본계 PV 모듈의 출력 특성 분석

Hee-Sang Yoon1,3
,
Hyung-Jun Song 2
,
Seok-Whan Go 2
,
Young-Chul Ju 2
,
Hyo Sik Chang 1*
,
Gi-Hwan Kang 2*
윤 희상1,3
,
송 형준2
,
고 석환2
,
주 영철2
,
장 효식1*
,
강 기환2*
1Graduate School of Energy Science and Technology, Chungnam National University
2Photovoltaic Laboratory, Korea Institute of Energy Research
1충남대학교 에너지과학기술대학원 에너지과학기술학과
2한국에너지기술연구원 태양광연구실
*교신저자. *Corresponding Author. 
*교신저자. *Corresponding Author. 
28 February 2018. pp. 45-55
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Abstract

Environmentally benign lead-free solder coated ribbon (e. g. SnCu, SnZn, SnBi…) has been intensively studied to interconnect cells without lead mixed ribbon (e. g. SnPb) in the crystalline silicon(c-Si) photovoltaic modules. However, high melting point (> 200°C) of non-lead based solder provokes increased thermo-mechanical stress during its soldering process, which causes early degradation of PV module with it. Hence, we proposed low-temperature conductive paste (CP) based tabbing method for lead-free ribbon. Modules, interconnected by the lead-free solder (SnCu) employing CP approach, exhibits similar output without increased resistivity losses at initial condition, in comparison with traditional high temperature soldering method. Moreover, 400 cycles (2,000 hour) of thermal cycle test reveals that the module integrated by CP approach withstands thermo-mechanical stress. Furthermore, this approach guarantees strong mechanical adhesion (peel strength of ~ 2 N) between cell and lead-free ribbons. Therefore, the CP based tabbing process for lead free ribbons enables to interconnect cells in c-Si PV module, without deteriorating its performance.

Keywords
c-Si Photovoltaic module
Conductive Paste
Pb-free solder
Low-temperature tabbing process

키워드
결정질 실리콘 태양전지모듈
전도성 페이스트
무연 솔더
저온 태빙 공정
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Information
  • Publisher :Korean Solar Energy Society
  • Publisher(Ko) :한국태양에너지학회
  • Journal Title :Journal of the Korean Solar Energy Society
  • Journal Title(Ko) :한국태양에너지학회 논문집
  • Volume : 38
  • No :1
  • Pages :45-55
  • Received Date : 2017-12-19
  • Revised Date : 2018-02-14
  • Accepted Date : 2018-02-27
  • DOI :https://doi.org/10.7836/kses.2018.38.1.045
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