Optical Characterization of Quantum Dot Intermediate Band Solar Cells

Cánovas Díaz, Enrique and Martí Vega, Antonio and Fuertes Marrón, David and Antolín Fernández, Elisa and García-Linares Fontes, Pablo and Luque López, Antonio and Farmer, C.D. and Stanley, Colin (2009). Optical Characterization of Quantum Dot Intermediate Band Solar Cells. In: "23rd European Photovoltaic Solar Energy Conference", 01/09/2008-05/09/2008, Valencia, España. ISBN 3-936338-24-8.

Description

Title: Optical Characterization of Quantum Dot Intermediate Band Solar Cells
Author/s:
  • Cánovas Díaz, Enrique
  • Martí Vega, Antonio
  • Fuertes Marrón, David
  • Antolín Fernández, Elisa
  • García-Linares Fontes, Pablo
  • Luque López, Antonio
  • Farmer, C.D.
  • Stanley, Colin
Item Type: Presentation at Congress or Conference (Article)
Event Title: 23rd European Photovoltaic Solar Energy Conference
Event Dates: 01/09/2008-05/09/2008
Event Location: Valencia, España
Title of Book: Proceedings of the 23rd European Photovoltaic Solar Energy Conference
Date: 2009
ISBN: 3-936338-24-8
Subjects:
Freetext Keywords: Intermediate Band, Quantum Dots, Spectroscopy
Faculty: E.T.S.I. Telecomunicación (UPM)
Department: Electrónica Física
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

In this paper we present an optical characterization for quantum dot intermediate band solar cells (QDIBSCs). The cells were developed by growing a stack of ten InAs/GaAs QDs layers between p and n doped GaAs conventional emitters. Electroluminescence, EL, photoreflectance, PR, and transmission electron microscopy, TEM, were applied to the samples in order to test and characterize them optically. The results, derived from the application of the different techniques, showed a good correlation. TEM images revealed a very good structural quality of the QDs, which seem to evolve in shape-strain from the bottom to the top of the stack. Corresponding to the quality observed by TEM, strong signals from EL and PR resolved unambiguously the energy band diagram of the QDIBSCs. By fitting PR data we were able to indentify the coexistence of bands and discrete energy levels coming from the IB material. The PR data evidenced also a strong electric field over the dots, attributed to the space charge region created between the p-n emitters sandwiching the IB material. From EL results, we identified the predominantly radiative nature of the IB material related energy transitions

More information

Item ID: 3579
DC Identifier: http://oa.upm.es/3579/
OAI Identifier: oai:oa.upm.es:3579
Deposited by: Memoria Investigacion
Deposited on: 01 Apr 2011 10:03
Last Modified: 20 Apr 2016 13:06
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