PVRD-FASP: A Unified Solver for Modeling Carrier and Defect Transport in Photovoltaic Devices

In this article, we present a simulator for modeling transport of charge carriers and electrically active defect centers in solar cells by treating them on an equal footing, which allows us to address metastability and reliability issues. The exact nonlinear differential equations set solved by our...

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Bibliographic Details
Published in:IEEE journal of photovoltaics 2019-11, Vol.9 (6), p.1602-1613
Main Authors: Shaik, Abdul R., Brinkman, Daniel, Sankin, Igor, Ringhofer, Christian, Krasikov, Dmitry, Kang, Hao, Benes, Bedrich, Vasileska, Dragica
Format: Article
Language:English
Subjects:
Cadmium compounds
Charge carriers
Charge transport
Chemicals
Computer simulation
Continuity equation
Current carriers
Defect chemical reactions
Defects
Differential equations
drift-diffusion-reaction solver
First principles
Heterojunctions
II-VI semiconductor materials
implicit Euler with Newton iteration
Mathematical model
Mathematical models
Nonlinear differential equations
Nonlinear equations
Photovoltaic cells
Photovoltaic systems
PN heterojunction
Poisson equation
Single crystals
Solar cells
SOLAR ENERGY
transient solutions for continuity equation
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Summary:In this article, we present a simulator for modeling transport of charge carriers and electrically active defect centers in solar cells by treating them on an equal footing, which allows us to address metastability and reliability issues. The exact nonlinear differential equations set solved by our solver is presented. The formulation of such differential equations, namely the continuity equations, drift-diffusion equation, and Poisson equation, for studying charge and defect transport is explained. The parameters needed for forming the differential equations are taken from first principle calculations. The solver is verified with test cases built on PN heterojunctions, Cu diffusion in single crystal CdTe and comparing Silvaco simulations with our numerical results.
ISSN:2156-3381
2156-3403
DOI:10.1109/JPHOTOV.2019.2937238