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T-Space at The University of Toronto Libraries >
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Please use this identifier to cite or link to this item: http://hdl.handle.net/1807/25580

Title: Laser Fired Aluminum Emitter for High Efficiency Silicon Photovoltaics Using Hydrogenated Amorphous Silicon and Silicon Oxide Dielectric Passivation
Authors: Fischer, Anton H.
Advisor: Kherani, Nazir P.
Department: Electrical and Computer Engineering
Keywords: Laser Fired Contact
LFC
a-Si:H
Hydrogenated Amorphous Silicon
DC Saddle Field
Localized Rear Emitter
Issue Date: 31-Dec-2010
Abstract: This thesis proposes and demonstrates a hydrogenated amorphous silicon passivated, inverted photovoltaic device on n-type silicon, utilizing a Laser Fired Emitter on a rear i-a- Si:H/SiOx dielectric stack. This novel low-temperature-fabricated device architecture constitutes the first demonstration of an LFE on a dielectric passivation stack. The optimization of the device is explored through Sentaurus computational modeling, predicting a potential efficiency of >20%. Proof of concept devices are fabricated using the DC Saddle Field PECVD system for the deposition of hydrogenated amorphous silicon passivation layers. Laser parameters are explored highlighting pulse energy density as a key performance determining factor. Annealing of devices in nitrogen atmosphere shows performance improvements albeit that the maximum annealing temperature is limited by the thermal stability of the passivation. A proof of concept device efficiency of 11.1% is realized forming the basis for further device optimization.
URI: http://hdl.handle.net/1807/25580
Appears in Collections:Master
The Edward S. Rogers Sr. Department of Electrical & Computer Engineering - Master theses

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