Doctoral thesis (Dissertations and theses)
Simulation d’une Cellule Solaire Cristalline par la Méthode des Différences Finies & Fabrication, Caractérisation et Modélisation de Cellules Solaires à base d’hétérojonctions organiques distribuées en volume
Aazou, Safae
2014
 

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Keywords :
Schéma aux différences finies; Schéma de Gummel-Scharfetter; Méthode des sur-relaxations successives; Algorithme de Newton-Raphson; Cellules solaires organiques à base d'hétérojonctions distribuées en volume; P3HT:PCBM; Mathematica, Maple; Modèle équivalent; Paramètres physiques; Méthodes d'extraction; AnEPVstat:PCBM; Spin-coating; IPCE, EQE, IQE
Abstract :
[en] This thesis is devoted to theoretical and experimental studies of the basic device of photovoltaic conversion : the solar cell. First, renewable energies are highlighted in a general introduction and their economic, ecologic and environmental advan- tages in comparison with fossil energy resources are emphasized, then, a revue of structure, types of bonds and energy bands of a solid material is presented and the case of a semiconductor is considered. Starting from Maxwell equations, the basic semiconductor equations namely Poisson’s equation and the continuity equations of electrons and holes are established. Next, discretizations of Poisson’s equation using a finite difference scheme and of the continuity equations by the Gummel-Scharfetter scheme are performed. The obtained system of equations is solved iteratively according Newton-Raphson algorithm. The experimental part of the work, entirely achieved in LIOS affiliated to JKU at Linz (Austria), aims the fabrication and the characterization of organic bulk heterojunction solar cells based on two different polymers used as donors P3HT and AnE-PVstat and the molecule PCBM as acceptor. A comparative study of the fabricated solar cells indicates that the device efficiency depends on the donor:acceptor ratio. In or- der to understand electronic and optical mechanisms occurring within a solar cell and which may affect its characteristics and performance, and to identify the role of the equivalent circuit parameters describing these mechanisms, many electronic circuits modelling the solar cell are presented and only the five physical parameters circuit is chosen. Several physical parameters extraction methods are exposed in details and only three of them are retained to extract the five physical parameters of the fabricated solar cells. The effects of each physical parameter on the solar cell efficiency are investigated. Thus, the variation intervals of the photovoltaic metrics, fill factor and efficiency under the influence of parameters variations can be identified.
Disciplines :
Physics
Author, co-author :
Aazou, Safae ;  Université de Liège - ULiège > Doct. sc. (physique - Bologne)
Language :
French
Title :
Simulation d’une Cellule Solaire Cristalline par la Méthode des Différences Finies & Fabrication, Caractérisation et Modélisation de Cellules Solaires à base d’hétérojonctions organiques distribuées en volume
Alternative titles :
[en] Simulation of optoelectronic devices with finite di↵erence scheme & Fabrication, Characterization and Modelling of organic bulk heterojunction solar cells
Defense date :
21 May 2014
Number of pages :
xxv, 218+38
Institution :
ULiège - Université de Liège
Université Chouaïb Doukkali, El Jadida, Morocco
Degree :
Docteur en Science Physique
Promotor :
NGUYEN, Ngoc Duy
ASSAID, El Mahdi
President :
ARBAOUI, Abdezzahid
Jury member :
EGBE, Daniel Ayuk Mbi
EL FAJRI, Abdelkrim
FEDDI, El Mustapha
MISKANE, Fatiha
Raty, Jean-Yves  ;  Université de Liège - ULiège > Complex and Entangled Systems from Atoms to Materials (CESAM)
ZAZOUI, Mimoun
Funders :
Ministère de l'Enseignement Supérieur, de la Recherche Scientifique et de la Formation des Cadres du Maroc, CNRST du Maroc, Fond Averoes
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