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Browse Journals & Magazines > Applied Physics Letters ...> Volume:84 Issue:17 Help

High-efficiency screen-printed solar cell on edge-defined film-fed grown ribbon silicon through optimized rapid belt co-firing of contacts and high-sheet-resistance emitter

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3 Author(s)
Rohatgi, A. ; University Center of Excellence for Photovoltaics Research and Education, School of Electrical and Computer Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332-0250 ; Hilali, Mohamed M. ; Nakayashiki, K.

Your organization might have access to this article on the publisher's site. To check, click on this link:http://dx.doi.org/+10.1063/1.1737069 

High-quality screen-printed contacts were achieved on a high-sheet-resistance emitter (∼100 Ω/sq.) using PV168 Ag paste and rapid co-firing in the belt furnace. The optimized co-firing cycle developed for a 100 Ω/sq. emitter produced 16.1% efficient 4 cm2 planar edge-defined film-fed grown (EFG) ribbon Si cells with a low series-resistance (0.8 Ω cm2), high fill factor of ∼0.77, along with very significant bulk lifetime enhancement from 3 to 100 μs. This represents the highest-efficiency screen-printed EFG Si cells with single-layer antireflection (AR) coating. These cells were fabricated using a simple process involving POCl3 diffusion for a high-sheet-resistance emitter, SiNx AR coating and rapid cofiring of Ag grid and Al-doped back-surface field in a conventional belt furnace. The rapid cofiring process also prevented junction shunting while maintaining very effective SiNx-induced hydrogen passivation of defects, resulting in an average bulk lifetime exceeding 100 μs. © 2004 American Institute of Physics.

Published in:
Applied Physics Letters  (Volume:84 ,  Issue: 17 )

Date of Publication: Apr 2004

Page(s):
3409 - 3411
ISSN :
0003-6951
Digital Object Identifier :
10.1063/1.1737069
Product Type:
Journals & Magazines
Date of Current Version :
18 June 2009
Issue Date :
Apr 2004

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