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Title: Front contact solar cell with formed emitter

A bipolar solar cell includes a backside junction formed by an N-type silicon substrate and a P-type polysilicon emitter formed on the backside of the solar cell. An antireflection layer may be formed on a textured front surface of the silicon substrate. A negative polarity metal contact on the front side of the solar cell makes an electrical connection to the substrate, while a positive polarity metal contact on the backside of the solar cell makes an electrical connection to the polysilicon emitter. An external electrical circuit may be connected to the negative and positive metal contacts to be powered by the solar cell. The positive polarity metal contact may form an infrared reflecting layer with an underlying dielectric layer for increased solar radiation collection.
Authors:
 [1]
  1. Menlo Park, CA
Publication Date:
OSTI Identifier:
1068556
Report Number(s):
8,222,516
US patent application 12/070,742
DOE Contract Number:
FC36-07GO17043
Resource Type:
Patent
Research Org:
SunPower Corporation (San Jose, CA)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
14 SOLAR ENERGY