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Title: Back contact to film silicon on metal for photovoltaic cells

Abstract

A crystal oriented metal back contact for solar cells is disclosed herein. In one embodiment, a photovoltaic device and methods for making the photovoltaic device are disclosed. The photovoltaic device includes a metal substrate with a crystalline orientation and a heteroepitaxial crystal silicon layer having the same crystal orientation of the metal substrate. A heteroepitaxial buffer layer having the crystal orientation of the metal substrate is positioned between the substrate and the crystal silicon layer to reduce diffusion of metal from the metal foil into the crystal silicon layer and provide chemical compatibility with the heteroepitaxial crystal silicon layer. Additionally, the buffer layer includes one or more electrically conductive pathways to electrically couple the crystal silicon layer and the metal substrate.

Inventors:
; ;
Publication Date:
Research Org.:
National Renewable Energy Lab. (NREL), Golden, CO (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1084083
Patent Number(s):
8,466,447
Application Number:
12/537,152
Assignee:
Alliance for Sustainable Energy, LLC (Golden, CO)
DOE Contract Number:  
AC36-08GO28308
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
14 SOLAR ENERGY

Citation Formats

Branz, Howard M., Teplin, Charles, and Stradins, Pauls. Back contact to film silicon on metal for photovoltaic cells. United States: N. p., 2013. Web.
Branz, Howard M., Teplin, Charles, & Stradins, Pauls. Back contact to film silicon on metal for photovoltaic cells. United States.
Branz, Howard M., Teplin, Charles, and Stradins, Pauls. Tue . "Back contact to film silicon on metal for photovoltaic cells". United States. https://www.osti.gov/servlets/purl/1084083.
@article{osti_1084083,
title = {Back contact to film silicon on metal for photovoltaic cells},
author = {Branz, Howard M. and Teplin, Charles and Stradins, Pauls},
abstractNote = {A crystal oriented metal back contact for solar cells is disclosed herein. In one embodiment, a photovoltaic device and methods for making the photovoltaic device are disclosed. The photovoltaic device includes a metal substrate with a crystalline orientation and a heteroepitaxial crystal silicon layer having the same crystal orientation of the metal substrate. A heteroepitaxial buffer layer having the crystal orientation of the metal substrate is positioned between the substrate and the crystal silicon layer to reduce diffusion of metal from the metal foil into the crystal silicon layer and provide chemical compatibility with the heteroepitaxial crystal silicon layer. Additionally, the buffer layer includes one or more electrically conductive pathways to electrically couple the crystal silicon layer and the metal substrate.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2013},
month = {6}
}

Patent:

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