Memorias de investigación
Ponencias en congresos:
The lead salt quantum dot intermediate band solar cell
Año:2011
Áreas de investigación
  • Células solares,
  • Tecnología de dispositivos para ingeniería eléctrica y electrónica
Datos
Descripción
We propose a new kind of quantum dot (QD) materials for the implementation of the intermediate band solar cell (IBSC) [1]. The materials are formed by lead salt QDs of the family IV-VI (PbTe, PbSe or PbS) embedded in a semiconductor of the family II-VI (Cd1-xMgxTe, CdxZn1-xTe, and CdS1-xSex or ZnSe1-xTex, respectively). These QDs are not nucleated due to lattice mismatch, as it is the case of the InAs/GaAs QD material system grown by the Stranski-Krastanov (S-K) mode. In these materials, the QDs precipitate due to the difference in lattice type: the QD lead salt material crystallizes in the rocksalt structure, while the II-VI host material has the zincblende structure [2]. Therefore, it is possible to use lattice-matched QD/host combinations, avoiding all the strain-related problems found in previous QD-IBSC developments. In this paper we discuss the properties of the lead salt QD materials and propose that they are appropriate to overcome the fundamental drawbacks of present III-Vbased QD-IBSC prototypes. We also calculate the band diagram for some examples of IV-VI/II-VI QD materials. The detailed balance efficiency limit of QD-IBSCs based on the studied materials is found to be over 60% under maximum concentration.
Internacional
Si
Nombre congreso
37th IEEE Photovoltaic Specialists Conference
Tipo de participación
960
Lugar del congreso
Seattle (EEUU)
Revisores
Si
ISBN o ISSN
0160-8371
DOI
10.1109/pvsc.2011.6186324
Fecha inicio congreso
19/06/2011
Fecha fin congreso
24/06/2011
Desde la página
1907
Hasta la página
1912
Título de las actas
Proc. 37th IEEE PVSC
Esta actividad pertenece a memorias de investigación
Participantes
Grupos de investigación, Departamentos, Centros e Institutos de I+D+i relacionados
  • Creador: Grupo de Investigación: Silicio y Nuevos Conceptos para Células Solares
  • Centro o Instituto I+D+i: Instituto de Energía Solar
  • Departamento: Electrónica Física