Memorias de investigación
Book chapters:
The Impact of Alloyed Capping Layers on the Performance of InAs/GaAs Quantum Dot Solar Cells

Research Areas
  • Electronic technology and of the communications

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.
Book Edition
Book Publishing
Book title
Advances in Energy Research. Volume 26
From page
To page

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