Title:	Determination of the Current and Illumination Dependent Series Resistance Using LED Solar Simulators
Author(s):	T. Luka, S. Eiternick, M. Turek
Keywords:	a-Si, c-Si, Performance, Solar Cell, Characterisation, Characterization, a-Si / μ-Si
Topic:	NEW MATERIALS AND CONCEPTS FOR SOLAR CELLS AND MODULES
Subtopic:	Fundamental Material Studies
Event:	29th European Photovoltaic Solar Energy Conference and Exhibition
Session:	1BV.6.10
Pages:	93 - 95
ISBN:	3-936338-34-5
Paper DOI:	10.4229/EUPVSEC20142014-1BV.6.10
Price:	0,00 EUR
Document(s):	paper

Abstract/Summary:

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The series resistance of a solar cell is an important cell parameter as it represents one major source of electrical losses. In this work, an approach to determine the series resistance as a function of the external current and the generated photo-current is presented that does not depend on the current-voltage-characteristics of the internal diode. Thus it is applicable to solar cells even if a description by means of a one- or two-diode model is not possible. Since this approach relies on the measurement of numerous current-voltage curves at varying illuminations an implementation using an LED-based solar simulator is favorable. Our investigations on different solar cell technologies revealed substantial differences of the dependence of the series resistance on the external current and the generated photo-current.