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Title: Method for formation of high quality back contact with screen-printed local back surface field

Abstract

A thin silicon solar cell having a back dielectric passivation and rear contact with local back surface field is described. Specifically, the solar cell may be fabricated from a crystalline silicon wafer having a thickness from 50 to 500 micrometers. A barrier layer and a dielectric layer are applied at least to the back surface of the silicon wafer to protect the silicon wafer from deformation when the rear contact is formed. At least one opening is made to the dielectric layer. An aluminum contact that provides a back surface field is formed in the opening and on the dielectric layer. The aluminum contact may be applied by screen printing an aluminum paste having from one to 12 atomic percent silicon and then applying a heat treatment at 750 degrees Celsius.

Inventors:
 [1];  [2]
  1. Marietta, GA
  2. Atlanta, GA
Issue Date:
Research Org.:
Georgia Institute of Technology, Atlanta, GA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1014722
Patent Number(s):
7842596
Application Number:
US Patent Application 12/116,100
Assignee:
Georgia Tech Research Corporation (Atlanta, GA)
Patent Classifications (CPCs):
H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01L - SEMICONDUCTOR DEVICES
Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE Y02E - REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
DOE Contract Number:  
FC36-07GO17023
Resource Type:
Patent
Country of Publication:
United States
Language:
English

Citation Formats

Rohatgi, Ajeet, and Meemongkolkiat, Vichai. Method for formation of high quality back contact with screen-printed local back surface field. United States: N. p., 2010. Web.
Rohatgi, Ajeet, & Meemongkolkiat, Vichai. Method for formation of high quality back contact with screen-printed local back surface field. United States.
Rohatgi, Ajeet, and Meemongkolkiat, Vichai. Tue . "Method for formation of high quality back contact with screen-printed local back surface field". United States. https://www.osti.gov/servlets/purl/1014722.
@article{osti_1014722,
title = {Method for formation of high quality back contact with screen-printed local back surface field},
author = {Rohatgi, Ajeet and Meemongkolkiat, Vichai},
abstractNote = {A thin silicon solar cell having a back dielectric passivation and rear contact with local back surface field is described. Specifically, the solar cell may be fabricated from a crystalline silicon wafer having a thickness from 50 to 500 micrometers. A barrier layer and a dielectric layer are applied at least to the back surface of the silicon wafer to protect the silicon wafer from deformation when the rear contact is formed. At least one opening is made to the dielectric layer. An aluminum contact that provides a back surface field is formed in the opening and on the dielectric layer. The aluminum contact may be applied by screen printing an aluminum paste having from one to 12 atomic percent silicon and then applying a heat treatment at 750 degrees Celsius.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2010},
month = {11}
}

Patent:

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Works referenced in this record:

Investigations on laser-fired contacts for passivated rear solar cells
conference, January 2002

  • Schneiderlochner, E.; Grohe, A.; Ballif, C.
  • Conference Record of the Twenty-Ninth IEEE Photovoltaic Specialists Conference 2002, Conference Record of the Twenty-Ninth IEEE Photovoltaic Specialists Conference, 2002.
  • https://doi.org/10.1109/PVSC.2002.1190518

Optimized aluminum back surface field techniques for silicon solar cells
conference, January 1997


Low-cost industrial technologies of crystalline silicon solar cells
journal, May 1997


Dielectric Rear Surface Passivation for Industrial Multicrystalline Silicon Solar Cells
conference, May 2006

  • Schultz, O.; Rentsch, J.; Grohe, A.
  • Conference Record of the 2006 IEEE 4th World Conference on Photovoltaic Energy Conversion, 2006 IEEE 4th World Conference on Photovoltaic Energy Conference
  • https://doi.org/10.1109/WCPEC.2006.279598

Technology Route Towards Industrial Application of Rear Passivated Silicon Solar Cells
conference, May 2006