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Improvement of electrical properties in screen-printed crystalline silicon solar cells by contact treatment of the grid edge
- Authors
- Kim, Seongtak; Park, Sungeun; Kim, Young Do; Boo, Hyunpil; Kim, Hyunho; Bae, Soohyun; Park, Hyomin; Tark, Sung Ju; Kim, Donghwan
- Issue Date
- Nov-2013
- Publisher
- KOREAN INST METALS MATERIALS
- Keywords
- Si solar cells; screen-printing; electrical properties; scanning electron microscopy; Ag paste; HF treatment
- Citation
- METALS AND MATERIALS INTERNATIONAL, v.19, no.6, pp.1333 - 1338
- Indexed
- SCIE
SCOPUS
KCI
- Journal Title
- METALS AND MATERIALS INTERNATIONAL
- Volume
- 19
- Number
- 6
- Start Page
- 1333
- End Page
- 1338
- ISSN
- 1598-9623
- Abstract
- In this study, the influence of HF treatment of Ag pastes after a firing process was investigated. It was shown that the HF treatment can improve the fill factors and efficiencies of various cells including those with high initial specific contact resistances. SEM images showed that this improvement is due to the etching of the thin glass layer at the Ag-Si boundary, which exposes the Ag crystallites and colloids. These colloids electrically connect the bulk Ag to the Si through a direct contact, which reduces both the transfer length and the specific contact resistance. A model of the current path was proposed to explain the effect of HF treatment on the edge of the Ag grid.
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Related Researcher
- KIM, Dong hwan
- 공과대학 (Department of Materials Science and Engineering)