Low-cost back contact silicon solar cells

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...

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Veröffentlicht in:IEEE transactions on electron devices 1999-10, Vol.46 (10), p.2000-2004
Hauptverfasser: Kress, A., Kuhn, R., Fath, P., Willeke, G.P., Bucher, E.
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container_end_page 2004
container_issue 10
container_start_page 2000
container_title IEEE transactions on electron devices
container_volume 46
creator Kress, A.
Kuhn, R.
Fath, P.
Willeke, G.P.
Bucher, E.
description 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 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; the photocurrent 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_str_mv 10.1109/16.791988
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identifier ISSN: 0018-9383
ispartof IEEE transactions on electron devices, 1999-10, Vol.46 (10), p.2000-2004
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subjects Assembling
BACK CONTACT SOLAR CELLS
COST
DESIGN
Devices
Emitters (electron)
FABRICATION
MATERIALS SCIENCE
Open circuit voltage
Photoelectric effect
Photovoltaic cells
Silicon
SILICON SOLAR CELLS
Solar cells
SOLAR ENERGY
title Low-cost back contact silicon solar cells
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