Universidad de Granada Digibug
 

Repositorio Institucional de la Universidad de Granada >
1.-Investigación >
Tesis >

Please use this identifier to cite or link to this item: http://hdl.handle.net/10481/44589

Title: Compact modeling of physical mechanisms in organic solar cells
Other Titles: Modelado compacto de mecanismos físicos en células solares orgánicas
Authors: López Varo, Pilar
Direction: Deen, Jamal
Jiménez Tejada, Juan Antonio
Collaborator: Universidad de Granada. Departamento de Electrónica y Tecnología de Computadores
Issue Date: 2016
Submitted Date: 10-Jan-2017
Abstract: Organic solar cells (OSCs) are promising devices in the field of solar energy. Their many advantages are intrinsic of the organic/polymeric technology, such as light weight, flexibility and low manufacturing costs. However, the degradation of OSCs hinders a predictable and a stable performance. In order to improve the device performance, accurate physics-based models, including boundary conditions, are needed. In this thesis, a model that relates the charge carrier density at the metal-organic boundaries with the current density in OSCs is considered for simulation and modeling purposes. The model is proposed after initial studies on single-carrier and bipolar organic diodes in darkness. The work begins with the proposal of a model for the current-voltage characteristics of organic and polymeric single-carrier diodes. The model unifies two different mechanisms in the structure, the injection and transport of charge, and includes a proper boundary condition for the free charge density at the metal-organic interface and a temperature and electric-field dependent mobility model. The results of the model highlight the importance of the boundary condition at the interface, which is used to explain different trends and their transitions in experimental current–voltage characteristics: linear, quadratic and a higher than quadratic trend at high electric fields. Una de las regiones más sensibles de una célula solar orgánica es la zona de contacto entre el electrodo metálico y el material orgánico. Por un lado, los contactos controlan el flujo de la corriente. Por otro lado, la región del contacto es altamente sensible a la degradación. La formación de una capa aislante cerca a la interfaz metal-orgánico o el decrecimiento de la velocidad de recombinación en el contacto son efectos desfavorables que reducen la eficiencia de las células solares [3, 4]. Para optimizar el rendimiento de estos dispositivos es requisito indispensable una detallada descripción de los mecanismos físicos que tienen lugar en la estructura metal-orgánico. El modelado y la simulación de estas estructuras son herramientas muy adecuadas para conseguir este objetivo.
Sponsorship: Tesis Univ. Granada. Programa Oficial de Doctorado en: Física y Ciencias del Espacio
The research was carried out within the framework of a scholarship supported financially by Ministerio de Educación y Ciencia under research Grant FPU12/02712 and MINECO under research Project TEC2013-47283-R.
Publisher: Universidad de Granada
Keywords: Células solares
Energía fotovoltaica
Semiconductores orgánicos
Optoelectrónica
Dispositivos optoelectrónicos
UDC: 53
210602
URI: http://hdl.handle.net/10481/44589
ISBN: 9788491630685
Rights : Creative Commons Attribution-NonCommercial-NoDerivs 3.0 License
Citation: López Varo, P. Compact modeling of physical mechanisms in organic solar cells. Granada: Universidad de Granada, 2016. [http://hdl.handle.net/10481/44589]
Appears in Collections:Tesis

Files in This Item:

File Description SizeFormat
26330404.pdf4.51 MBAdobe PDFView/Open
Recommend this item

This item is licensed under a Creative Commons License
Creative Commons

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

 

Valid XHTML 1.0! OpenAire compliant DSpace Software Copyright © 2002-2007 MIT and Hewlett-Packard - Feedback

© Universidad de Granada