Relationship between Device Performance and Grain Boundary Structural Configuration in a Solar Cell Based on Multicrystalline SiGe

Noritaka Usami, Wugen Pan, Kozo Fujiwara, Toru Ujihara, Gen Sazaki, Kazuo Nakajima

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

The grain boundary character distribution of multicrystalline SiGe (mc-SiGe) solar cells with microscopic compositional distribution was revealed to have a significant effect on the photovoltaic performance of solar cells. This was clarified by comparing the photovoltaic performance of small-area (≈0.02 cm2) solar cells fabricated in a large-area solar cell with their local structures. With increasing fraction of random grain boundaries in a small-area solar cell, the conversion efficiency was found to decrease. On the other hand, Σ3 grain boundaries are found to be dominant in a solar cell with good performance. These results suggest that the development of a crystal growth technique that fully controls the grain boundary character distribution is the key to improving the conversion efficiency of the solar cell based on multicrystalline semiconductors.

Original languageEnglish
Pages (from-to)L250-L252
JournalJapanese Journal of Applied Physics, Part 2: Letters
Volume43
Issue number2 B
DOIs
Publication statusPublished - 2004 Feb 15

Keywords

  • Grain boundary character
  • Multicrystal
  • Solar cell

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy (miscellaneous)
  • Physics and Astronomy(all)

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