Abstract
For rear metallization with Al paste, Al back contacts require good passivation, high reflectance, and a processing temperature window compatible with the front metal. In this paper, the effect of the firing ambient during the metallization process on the formation of Al rear metal was investigated. We chose three different gases as ambient gases during the firing process. Using SEM, we observed the formation of a back surface field in N2, O2, and Air ambients. To determine the effect of the ambient on Voc, the suns-Voc tool was used. In this study, we described the mechanism of burn-out of organic materials in Al paste during the firing process. The oxygen ambient plays an important role in the burn-out process. We calculated the efficiency with obtained the back surface recombination velocities using PC1D simulation. It was found that the presence of oxygen during the firing process influenced the uniform back surface field because the organic materials in the Al paste were efficiently burned out during heating. The optimized temperature with oxygen flow shows an absolute efficiency of 19.1% at PC1D simulation.
| Original language | English |
|---|---|
| Pages (from-to) | 336-340 |
| Number of pages | 5 |
| Journal | Korean Journal of Materials Research |
| Volume | 25 |
| Issue number | 7 |
| DOIs | |
| Publication status | Published - 2015 |
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Keywords
- Al rear metallization
- Back surface field
- Back surface recombination velocity
- Crystalline silicon solar cells
- Firing process
ASJC Scopus subject areas
- Materials Science(all)
Cite this
Effects of firing ambient on rear metallization for silicon solar cells. / Park, Sungeun; Kim, Young Do; Park, Hyomin; Kang, Yoon Mook; Lee, Haeseok; Kim, Donghwan.
In: Korean Journal of Materials Research, Vol. 25, No. 7, 2015, p. 336-340.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Effects of firing ambient on rear metallization for silicon solar cells
AU - Park, Sungeun
AU - Kim, Young Do
AU - Park, Hyomin
AU - Kang, Yoon Mook
AU - Lee, Haeseok
AU - Kim, Donghwan
PY - 2015
Y1 - 2015
N2 - For rear metallization with Al paste, Al back contacts require good passivation, high reflectance, and a processing temperature window compatible with the front metal. In this paper, the effect of the firing ambient during the metallization process on the formation of Al rear metal was investigated. We chose three different gases as ambient gases during the firing process. Using SEM, we observed the formation of a back surface field in N2, O2, and Air ambients. To determine the effect of the ambient on Voc, the suns-Voc tool was used. In this study, we described the mechanism of burn-out of organic materials in Al paste during the firing process. The oxygen ambient plays an important role in the burn-out process. We calculated the efficiency with obtained the back surface recombination velocities using PC1D simulation. It was found that the presence of oxygen during the firing process influenced the uniform back surface field because the organic materials in the Al paste were efficiently burned out during heating. The optimized temperature with oxygen flow shows an absolute efficiency of 19.1% at PC1D simulation.
AB - For rear metallization with Al paste, Al back contacts require good passivation, high reflectance, and a processing temperature window compatible with the front metal. In this paper, the effect of the firing ambient during the metallization process on the formation of Al rear metal was investigated. We chose three different gases as ambient gases during the firing process. Using SEM, we observed the formation of a back surface field in N2, O2, and Air ambients. To determine the effect of the ambient on Voc, the suns-Voc tool was used. In this study, we described the mechanism of burn-out of organic materials in Al paste during the firing process. The oxygen ambient plays an important role in the burn-out process. We calculated the efficiency with obtained the back surface recombination velocities using PC1D simulation. It was found that the presence of oxygen during the firing process influenced the uniform back surface field because the organic materials in the Al paste were efficiently burned out during heating. The optimized temperature with oxygen flow shows an absolute efficiency of 19.1% at PC1D simulation.
KW - Al rear metallization
KW - Back surface field
KW - Back surface recombination velocity
KW - Crystalline silicon solar cells
KW - Firing process
UR - http://www.scopus.com/inward/record.url?scp=84945964218&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84945964218&partnerID=8YFLogxK
U2 - 10.3740/MRSK.2015.25.7.336
DO - 10.3740/MRSK.2015.25.7.336
M3 - Article
AN - SCOPUS:84945964218
VL - 25
SP - 336
EP - 340
JO - Korean Journal of Materials Research
JF - Korean Journal of Materials Research
SN - 1225-0562
IS - 7
ER -