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Title: Low-cost back contact silicon solar cells

Abstract

Back-contacted solar cells offer multiple advantages in regard of reducing module assembling costs and avoiding grid shadowing losses. The investigated emitter-wrap=through (EWT) device design has an electrical connection of the front emitter and the rear emitter grid in form of small holes drilled into the crystalline silicon wafer. The thus obtained cell structure is especially suitable for low-cost base material with small minority carrier diffusion lengths. Different industrially applicable solar cell manufacturing processes for EWT devices are described and compared. The latest experimental results are presented and interpreted; especially the photo-current is found to be distinctly increased. The relation between open circuit voltage and rear side passivation is discussed based on two-dimensional (2-D) computer simulations.

Authors:
; ; ; ;
Publication Date:
Research Org.:
Univ. Konstanz (DE)
Sponsoring Org.:
German Research Ministry
OSTI Identifier:
20006070
Resource Type:
Journal Article
Resource Relation:
Journal Name: IEEE Transactions on Electron Devices (Institute of Electrical and Electronics Engineers); Journal Volume: 46; Journal Issue: 10; Other Information: PBD: Oct 1999
Country of Publication:
United States
Language:
English
Subject:
14 SOLAR ENERGY; 36 MATERIALS SCIENCE; SILICON SOLAR CELLS; COST; FABRICATION; DESIGN; BACK CONTACT SOLAR CELLS

Citation Formats

Kress, A., Kuehn, R., Fath, P., Willeke, G.P., and Bucher, E.. Low-cost back contact silicon solar cells. United States: N. p., 1999. Web. doi:10.1109/16.791988.
Kress, A., Kuehn, R., Fath, P., Willeke, G.P., & Bucher, E.. Low-cost back contact silicon solar cells. United States. doi:10.1109/16.791988.
Kress, A., Kuehn, R., Fath, P., Willeke, G.P., and Bucher, E.. Fri . "Low-cost back contact silicon solar cells". United States. doi:10.1109/16.791988.
@article{osti_20006070,
title = {Low-cost back contact silicon solar cells},
author = {Kress, A. and Kuehn, R. and Fath, P. and Willeke, G.P. and Bucher, E.},
abstractNote = {Back-contacted solar cells offer multiple advantages in regard of reducing module assembling costs and avoiding grid shadowing losses. The investigated emitter-wrap=through (EWT) device design has an electrical connection of the front emitter and the rear emitter grid in form of small holes drilled into the crystalline silicon wafer. The thus obtained cell structure is especially suitable for low-cost base material with small minority carrier diffusion lengths. Different industrially applicable solar cell manufacturing processes for EWT devices are described and compared. The latest experimental results are presented and interpreted; especially the photo-current is found to be distinctly increased. The relation between open circuit voltage and rear side passivation is discussed based on two-dimensional (2-D) computer simulations.},
doi = {10.1109/16.791988},
journal = {IEEE Transactions on Electron Devices (Institute of Electrical and Electronics Engineers)},
number = 10,
volume = 46,
place = {United States},
year = {Fri Oct 01 00:00:00 EDT 1999},
month = {Fri Oct 01 00:00:00 EDT 1999}
}