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Dissertation - AnujaParikh.pdf (3.44 MB)

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Numerical Analysis of Diffusion In Crystalline And Polycrystalline Materials-Application to PhotoVoltaics

Parikh, Anuja V
http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1540382764897629

Abstract Details

2019, Master of Science (MS), Bowling Green State University, Physics.
Cadmium telluride (CdTe) and copper indium gallium diselenide (CIGS) based thin-film photovoltaic devices are leading candidates for cost-effective solar electricity. Inter-diffusion of atoms in device components play a critical role in the performance and degradation of a thin-film solar cell. Diffusion studies require special attention because device components are in general polycrystalline and exhibit grain boundaries. In this work, we review the physics of diffusion kinetics in solids (crystalline and polycrystalline) and develop a general numerical simulation tool for ion drift-diffusion. We validate the model against literature data and analytical expressions for the technologically important cases of copper (Cu) and phosphorus (P) in CdTe. We present empirical and numerical analysis for evaluation of sodium (Na) diffusion in CIGS. The calculations are conducted by the finite element method using COMSOL Multiphysics® software. Our study indicates that both Cu and P diffuses in crystalline CdTe using two mechanisms, slow and fast. In the case of Cu in crystalline CdTe, our model confirms the slow diffusivity values of 3.710-4 exp(- 0.67eV/kT) cm2/s and 6.610-5 exp(-0.50eV/kT) cm2/s depending on the experiment, along with the fast diffusivity of 210-8 cm2/s. In case of P in crystalline CdTe, the slow and fast diffusivities are confirmed to be 4.8610-3 exp(-2.03eV/kT) cm2/s and 2.1510-5 exp(-1.0eV/kT) cm2/s, respectively. Migration of P in polycrystalline CdTe includes a grain boundary diffusion coefficient of 6.61102 exp(-1.97eV/kT) cm2/s. Our analysis for Na in polycrystalline CIGS indicates the grain boundary diffusivity of 5.0610-9 exp(-0.09eV/kT) cm2/s.
Marco Nardone, Ph.D. (Advisor)
Lewis Fulcher, Ph.D. (Committee Member)
Alexey Zayak, Ph.D. (Committee Member)
62 p.
Materials Science; Physics
diffusion in polycrystalline material; numerical modeling of diffusion; Na in CIGS; Cu in CdTe

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Citations

  • Parikh, A. V. (2019). Numerical Analysis of Diffusion In Crystalline And Polycrystalline Materials-Application to PhotoVoltaics [Master's thesis, Bowling Green State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1540382764897629

    APA Style (7th edition)

  • Parikh, Anuja. Numerical Analysis of Diffusion In Crystalline And Polycrystalline Materials-Application to PhotoVoltaics. 2019. Bowling Green State University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1540382764897629.

    MLA Style (8th edition)

  • Parikh, Anuja. "Numerical Analysis of Diffusion In Crystalline And Polycrystalline Materials-Application to PhotoVoltaics." Master's thesis, Bowling Green State University, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1540382764897629

    Chicago Manual of Style (17th edition)

bgsu1540382764897629
1,082
© 2018, some rights reserved.Creative Commons License Numerical Analysis of Diffusion In Crystalline And Polycrystalline Materials-Application to PhotoVoltaics by Anuja V Parikh is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported License. Based on a work at etd.ohiolink.edu.
This open access ETD is published by Bowling Green State University and OhioLINK.