Observatorio de I+D+i UPM

Memorias de investigación
Communications at congresses:
Application of photoreflectance to advanced photovoltaic devices
Year:2012
Research Areas
  • Physic chemistry,
  • Electric engineers, electronic and automatic (eil),
  • Solar cells
Information
Abstract
Photoreflectance (PR) is a convenient characterization tool able to reveal optoelectronic properties of semiconductor materials and structures. It is a simple non-destructive and contactless technique which can be used in air at room temperature. We will present experimental results of the characterization carried out by means of PR on different types of advanced photovoltaic (PV) structures, including quantum-dot-based prototypes of intermediate band solar cells, quantum-well structures, highly mismatched alloys, and III?V-based multi-junction devices, thereby demonstrating the suitability of PR as a powerful diagnostic tool. Examples will be given to illustrate the value of this spectroscopic technique for PV including (i) the analysis of the PR spectra in search of critical points associated to absorption onsets; (ii) distinguishing signatures related to quantum confinement from those originating from delocalized band states; (iii) determining the intensity of the electric field related to built-in potentials at interfaces according to the Franz?Keldysh (FK) theory; and (v) determining the nature of different oscillatory PR signals among those ascribed to FK-oscillations, interferometric and photorefractive effects. The aim is to attract the interest of researchers in the field of PV to modulation spectroscopies, as they can be helpful in the analysis of their devices.
International
Si
Congress
EMRS 2012 Spring Meeting - Symposium Y: Advanced Materials and characterization techniques for solar cells
960
Place
Estrasburgo, Francia
Reviewers
Si
ISBN/ISSN
0921-5107
10.1016/j.mseb.2012.11.012
Start Date
14/05/2012
End Date
18/05/2012
From page
599
To page
608
Publicadas en Materials Science and Engineering B, 178 (9), pp. 599-608 (2013)
Participants
  • Autor: David Fuertes Marron (UPM)
  • Autor: E. Cánovas
  • Autor: Irene Artacho Huertas (UPM)
  • Autor: C. Stanley
  • Autor: M. Steer
  • Autor: T. Kaizu
  • Autor: Y. Shoji
  • Autor: N. Ahsan
  • Autor: Y. Okada
  • Autor: Enrique Barrigon Montañes (UPM)
  • Autor: Ignacio Rey-Stolle Prado (UPM)
  • Autor: Carlos Algora Del Valle (UPM)
  • Autor: Antonio Marti Vega (UPM)
  • Autor: Antonio Luque Lopez (UPM)
Research Group, Departaments and Institutes related
  • Creador: Grupo de Investigación: Semiconductores III-V
  • Centro o Instituto I+D+i: Instituto de Energía Solar
  • Grupo de Investigación: Silicio y Nuevos Conceptos para Células Solares
  • Departamento: Electrónica Física
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