Observatorio de I+D+i UPM

Memorias de investigación
Book chapters:
The Impact of Alloyed Capping Layers on the Performance of InAs/GaAs Quantum Dot Solar Cells
Year:2017
Research Areas
  • Electronic technology and of the communications
Information
Abstract
This chapter reviews the impact of using thin alloyed capping layers (CLs) for InAs/GaAs quantum dot (QD) solar cells. This novel approach can be considered as a particular way to develop hybrid QD-quantum well (QW) solar cells in which a thin QW is additionally used to modify the properties of QDs. The tunability of the absorption edge, defined by the QD ground state, together with the additional photocurrent from the CL allows outweighing the virtually inevitable consequent drop in the open-circuit voltage, achieving an improved solar cell performance. Besides tuning the absorption edge, the use of a thin CL involves further implications concerning the structural properties and the electronic structure, which will be directly linked to the final device performance. Indeed, the QD-CL band alignment and the strain field can be modified according to the CL nature, whose presence may additionally affect carrier transport and therefore collection efficiency. This chapter encompasses a comprehensive exposition of the main mechanisms involved in the operation of QD solar cells modified by the introduction of thin CLs, supported by the combination of different characterization techniques and theoretical simulations.
International
Si
Book Edition
Book Publishing
ISBN
978-1-53611-103-3
Series
Book title
Advances in Energy Research. Volume 26
From page
83
To page
122
Participants
  • Autor: Antonio David Utrilla Lomas (UPM)
  • Autor: Daniel Fernández Reyes (UCA)
  • Autor: José M. Llorens (IMM)
  • Autor: Irene Artacho Huertas (UPM)
  • Autor: Teresa Ben (UCA)
  • Autor: David González (UCA)
  • Autor: Zarko Gacevic (UPM)
  • Autor: Alvaro de Guzman Fernandez Gonzalez (UPM)
  • Autor: Adrian Hierro Cano (UPM)
  • Autor: Jose Maria Ulloa Herrero (UPM)
Research Group, Departaments and Institutes related
  • Creador: Grupo de Investigación: Grupo de Dispositivos Semiconductores del ISOM
  • Grupo de Investigación: Silicio y Nuevos Conceptos para Células Solares
  • Departamento: Ingeniería Electrónica
  • Centro o Instituto I+D+i: Instituto Universitario de Sistemas Optoelectrónicos y Microtecnología
  • Departamento: Electrónica Física, Ingeniería Eléctrica y Física Aplicada
  • Centro o Instituto I+D+i: Instituto de Energía Solar
  • Departamento: Ciencia de Materiales
S2i 2019 Observatorio de investigación @ UPM con la colaboración del Consejo Social UPM
Cofinanciación del MINECO en el marco del Programa INNCIDE 2011 (OTR-2011-0236)
Cofinanciación del MINECO en el marco del Programa INNPACTO (IPT-020000-2010-22)