BEAM DELIVERY SYSTEM FOR LASER FIRED CONTACT

Open Access
Author:
Hua, Zhenyan
Graduate Program:
Electrical Engineering
Degree:
Master of Science
Document Type:
Master Thesis
Date of Defense:
March 22, 2010
Committee Members:
  • Timothy Joseph Kane, Thesis Advisor
Keywords:
  • Diffractive Beam Splitter
  • Diffractive
  • Diffractive Optical Element
  • DBS
  • DOE
  • Laser Fired Contact
  • LFC
  • MicroOptics
  • Microlens Array
  • Microlens
  • Silicon Solar Cell
Abstract:
A Laser Fired Contact (LFC) is a contact through the dielectric layer between the silicon wafer and back-side conductor layer produced by a laser-based technique. Such a technique holds promise to dramatically reduce the overall manufacturing cost of silicon based solar cells. As part of a parallel effort to investigate and optimize LFC technology, the work presented here looks at different technologies that can be used as part of a LFC beam delivery system to meet the desired production throughput. Two beam splitting technologies, diffractive optical elements (DOE) and microlens arrays, were evaluated and corresponding results are presented. The beam splitting technologies were tested with a Q-switched 532nm Nd:YAG laser to produce an array of LFCs simultaneously.