Butterfly-shaped distribution of SiNx precipitates in multi-crystalline Si for solar cells

Jianyong Li, Ronit Roneel Prakash, Karolin Jiptner, Jun Chen, Yoshiji Miyamura, Hirofumi Harada, Koichi Kakimoto, Atsushi Ogura, Takashi Sekiguchi

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)


This paper concerns the precipitation mechanism of SiNx impurities in multi-crystalline silicon grown with a directional solidification system. A butterfly-shaped precipitate region was found across the middle part of ingot. These precipitates showed filament-like and fiber-like shapes of several micrometers in diameter and up to several millimeters in length. These two types of precipitates exist in different areas, forming three distribution zones in the butterfly region. The precipitate growth periodically stopped at the last stage of the butterfly formation. A non-uniform convection flow model was proposed to explain the precipitation behavior at the butterfly.

Original languageEnglish
Pages (from-to)37-42
Number of pages6
JournalJournal of Crystal Growth
Publication statusPublished - 2013

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Inorganic Chemistry
  • Materials Chemistry


Dive into the research topics of 'Butterfly-shaped distribution of SiNx precipitates in multi-crystalline Si for solar cells'. Together they form a unique fingerprint.

Cite this