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Title: Fabricating solar cells with silicon nanoparticles

A laser contact process is employed to form contact holes to emitters of a solar cell. Doped silicon nanoparticles are formed over a substrate of the solar cell. The surface of individual or clusters of silicon nanoparticles is coated with a nanoparticle passivation film. Contact holes to emitters of the solar cell are formed by impinging a laser beam on the passivated silicon nanoparticles. For example, the laser contact process may be a laser ablation process. In that case, the emitters may be formed by diffusing dopants from the silicon nanoparticles prior to forming the contact holes to the emitters. As another example, the laser contact process may be a laser melting process whereby portions of the silicon nanoparticles are melted to form the emitters and contact holes to the emitters.
Inventors:
; ;
Issue Date:
OSTI Identifier:
1154931
Assignee:
SunPower Corporation (San Jose, CA) GFO
Patent Number(s):
8,822,262
Application Number:
13/335,550
Contract Number:
FC36-07GO17043
Research Org:
SunPower Corporation, San Jose, CA (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
14 SOLAR ENERGY

Works referenced in this record:

The promise of concentrators
journal, January 2000