ASSESSMENT OF SURFACE DAMAGE OF SILICON UNDER LASER PROCESSING FOR USE IN PHOTOVOLTAICS

Open Access
Author:
Heinrichs, Holly E
Area of Honors:
Engineering Science
Degree:
Bachelor of Science
Document Type:
Thesis
Thesis Supervisors:
  • S Ashok, Thesis Supervisor
  • Jun Huang, Honors Advisor
  • Judith Todd Copley, Faculty Reader
Keywords:
  • Laser Processing
  • Photovoltaics
  • Silicon
  • Schottky barrier height modifications
Abstract:
The integration of laser processing techniques in solar cell production holds enormous potential enhancements in both cell performance and manufacturability. However, with all the potential benefits, there are also downsides. This thesis focuses on examining the surface electrical damage that occur after laser processing has taken place over a given area, under various power and frequency levels. This is done by examining the current-voltage characteristics of surface barriers formed by Schottky metal deposition. The change in Schottky barrier height of the samples is evaluated for a qualitative assessment of surface damage and general trends in behavior are noted. This thesis is designed to offer insight into the surface lattice damage effects and investigate the causes of the Schottky barrier height alterations. Ultimately this work will add to the knowledge of how lasers impact solar cell performance and efficiency within the photovoltaic industry.