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Effective Lifetime Experimental Measurement under External Magnetic Field in Transient Dynamic State by Open Circuit Voltage Decay Method

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Energy and Power Engineering 2020年第12期12卷 709-715页

作者： nazé yacouba traoré Raguilignaba Sam Alain Diasso Bernard Zouma François Zougmoré University of nazi Boni Department of physic Units of Sciences and Technology Bobo Dioulasso Burkina Faso University of Joseph Ki-Zerbo Department of Physic Laboratory of Materials and Environment Units of Sciences and Technology Ouagadougou Burkina Faso University of Ouagadougou Department of Physic Laboratory of Thermal and Renewable Energy Units of Sciences and Technology Ouagadougou Burkina Faso

In this work, we present an experimental transient 3-Dimensionnal study for the minority charge carriers’ effective lifetime measurement under magnetic field in transient dynamic state. The magnitude of the magnetic field B is varied from 0 mT to 0.03 mT. The method used is mainly based on the open circuit voltage decay method. The solar cell is injected by a low electrical excitation which protects against capacitance effects. Our approach is based on the open circuit voltage decay response analysis. From an experimental set-up, we get the transient voltage data on a digital scope. The data are used for plotting transient voltage decay curves. The curves obtained and analyzed are fitted in their linear zone. This zone presents an ideal decay which permits to get good values of lifetime. The slope of the linear decay is inversely proportional to effective lifetime. The results of fitting permit determinate the effective charge carriers’ lifetime directly. The results obtained are then presented and analyzed. The observations indicate that the charge carriers effective lifetime decrease when the magnetic field increases.

关键词： Effective Lifetime Electrical Excitation Frequential Dynamic Regime Magnetic Field

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