Application of fine electrode for high efficiency mc-Si solar cells over 18%

Author

Komatsu, Yuji ; Takaba, Yoshiroh ; Yamasaki, Ichiroh ; Yang, Ming-Ju ; Okamoto, Satoshi ; Okamoto, Yasunari ; Nunoi, Tohru ; Shimizu, Masafumi

Author_Institution

Ecological Technol. Dev. Center, SHARP Corp., Nara, Japan

Volume

2

fYear

2003

fDate

18-18 May 2003

Firstpage

1459

Abstract

To attain a high efficiency for mc-Si solar cell, a front fine electrode was applied to the conventional cell process instead of a screen-printed electrode. Efficiencies of 19.0%, 18.9%, and 18.4% were obtained for 1-cm/sup 2/, 4-cm/sup 2/, and 25-cm/sup 2/ cells, respectively. The applying effects of the front fine electrode were discussed using the cell characteristics and the spectral IQE, comparing with the printed electrode cell. Owing to the application, high sheet resistance for an n/sup +/ emitter layer is allowed with the narrower subgrid interval and the Surface Recombination Velocity (SRV) is expected to be reduced. Consequently, the SRV value was reduced to be one third, and Jsc, Voc, and FF were increased by 8%, 3%, and 4%, respectively.

Keywords

electrodes; elemental semiconductors; silicon; solar cells; surface recombination; Si; front fine electrode; high sheet resistance; multicrystalline Si solar cell; n/sup +/ emitter layer; screen printed electrode cell; spectral internal quantum efficiency; surface recombination velocity;

fLanguage

English

Publisher

ieee

Conference_Titel

Photovoltaic Energy Conversion, 2003. Proceedings of 3rd World Conference on

Conference_Location

Osaka, Japan

Print_ISBN

4-9901816-0-3

Type

conf

Filename

1306199