Photoreflectance analysis of a GaInP/GaInAs/Ge multijunction solar cell

Cánovas Díaz, Enrique and Fuertes Marrón, David and Martí Vega, Antonio and Luque López, Antonio and Bett, Andreas W. and Dimroth, F. and Philipps, S. P. (2010). Photoreflectance analysis of a GaInP/GaInAs/Ge multijunction solar cell. "Applied Physics Letters", v. 94 (n. 20); pp. 345-349. ISSN 0003-6951. https://doi.org/10.1063/1.3517255.

Description

Title: Photoreflectance analysis of a GaInP/GaInAs/Ge multijunction solar cell
Author/s:
  • Cánovas Díaz, Enrique
  • Fuertes Marrón, David
  • Martí Vega, Antonio
  • Luque López, Antonio
  • Bett, Andreas W.
  • Dimroth, F.
  • Philipps, S. P.
Item Type: Article
Título de Revista/Publicación: Applied Physics Letters
Date: February 2010
ISSN: 0003-6951
Volume: 94
Subjects:
Faculty: E.T.S.I. Telecomunicación (UPM)
Department: Electrónica Física
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

We have analyzed the photoreflectance spectra of a GaInP/GaInAs/Ge triple junction solar cell. The spectra reveal signatures from the window layer and middle and top subcells included in the stack. Additional contributions from the multilayer buffer introduced between the mismatched bottom and middle cells have been detected. Franz–Keldysh oscillations (FKOs) dominate the spectra above the fundamental bandgaps of the GaInP and GaInAs absorbers. From the FKO analysis, we have estimated the dominant electric fields within each subcell. In light of these results, photoreflectance is proposed as a useful diagnostic tool for quality assessment of multijunction structures prior to completion of the device or at earlier stages during its processing.

Funding Projects

TypeCodeAcronymLeaderTitle
FP7211640IBPOWERUnspecifiedIntermediate Band Materials and Solar Cells for Photovoltaics with High Efficiency and Reduced Cost

More information

Item ID: 8076
DC Identifier: http://oa.upm.es/8076/
OAI Identifier: oai:oa.upm.es:8076
DOI: 10.1063/1.3517255
Official URL: http://apl.aip.org/resource/1/applab/v97/i20/p203504_s1?isAuthorized=no
Deposited by: Memoria Investigacion
Deposited on: 18 Aug 2011 11:57
Last Modified: 03 Nov 2014 12:28
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