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Computer Simulation of Edge Effects in a Small-Area Mesa N-P Junction Diode

Published online by Cambridge University Press:  21 March 2011

Jesse Appel
Affiliation:
National Renewable Energy Laboratory, Golden, CO 80401, USA
Bhushan Sopori
Affiliation:
National Renewable Energy Laboratory, Golden, CO 80401, USA
N.M. Ravindra
Affiliation:
New Jersey Institute of Technology, Newark, NJ 07102, USA
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Abstract

The influence of edges on the performance of small-area solar cells is determined using a modified commercial, finite-element software package. The n+/p mesa device is modeled as having a sub-oxide layer on the edges, which acquires positive charges that result in development of an electric field within the device. Our computer simulations include generation/ recombination at the diode edges as well as the influence of light on the recombination characteristics of the edges. We present a description of our model, dark and illuminated characteristics of devices with various surface charge concentrations, and the dynamics of carrier generation/recombination. The influence of edge geometry on diode performance is determined.

Type
Research Article
Copyright
Copyright © Materials Research Society 2009

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