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Title: Fabricating solar cells with silicon nanoparticles

Patent ·
OSTI ID:1154931
; ;

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.

Research Organization:
SunPower Corporation, San Jose, CA (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
FC36-07GO17043
Assignee:
SunPower Corporation (San Jose, CA)
Patent Number(s):
8,822,262
Application Number:
13/335,550
OSTI ID:
1154931
Country of Publication:
United States
Language:
English

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