Precise selective scribing of thin-film solar cells by a picosecond laser

Xin Zhao, Yunfeng Cao, Qiong Nian, Yung C. Shin, Gary Cheng

Research output: Contribution to journalArticlepeer-review

15 Scopus citations


In this paper, precise scribing of thin-film solar cells (CIGS/Mo/Glass) via a picosecond laser is investigated. A parametric study is carried out for P1 and P2 scribing to study the effects of laser fluence and overlap ratio on scribing quality and ablation depth. Three ablation regimes are observed for P1 scribing in different laser fluence ranges, due to the involvement of different ablation mechanisms. The optimum scribing conditions are determined for both P1 and P2 scribing, and the potential processing speed is significantly increased. The heat accumulation effect at different repetition rates is studied to extrapolate the results from low to high repetition rates. A two-temperature model-based model is developed to simulate the scribing process for multiple thin films, providing decent prediction of the slot depth for both P1 and P2 scribing.

Original languageEnglish (US)
Pages (from-to)671-681
Number of pages11
JournalApplied Physics A: Materials Science and Processing
Issue number2
StatePublished - Aug 2014
Externally publishedYes

ASJC Scopus subject areas

  • General Chemistry
  • General Materials Science


Dive into the research topics of 'Precise selective scribing of thin-film solar cells by a picosecond laser'. Together they form a unique fingerprint.

Cite this