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Combined photo- and electroreflectance of multijunction solar cells enabled by subcell electric coupling

Fuertes Marrón, D. ; Barrigón, E. LU ; Ochoa, M. and Artacho, I. (2019) In Applied Physics Letters 114(15). p.153501-153501
Abstract
Electric coupling between subcells of a monolithically grown multijunction solar cell in short circuit allows their simultaneous and independent characterization by means of photo- and electro-reflectance. The photovoltage generated by selective absorption of the pump beam in a given subcell during photoreflectance measurements results in reverse biasing the complementary subunits at the modulation frequency set on the pump illumination. Such voltage bias modulation then acts as external perturbation on the complementary subcells. The spectral separation of different subcell absorption ranges permits the probe beam to record in a single spectrum the response of the complete device as a combination of photo- and electro-reflectance, thereby... (More)
Electric coupling between subcells of a monolithically grown multijunction solar cell in short circuit allows their simultaneous and independent characterization by means of photo- and electro-reflectance. The photovoltage generated by selective absorption of the pump beam in a given subcell during photoreflectance measurements results in reverse biasing the complementary subunits at the modulation frequency set on the pump illumination. Such voltage bias modulation then acts as external perturbation on the complementary subcells. The spectral separation of different subcell absorption ranges permits the probe beam to record in a single spectrum the response of the complete device as a combination of photo- and electro-reflectance, thereby providing access for the diagnosis of subcells on an individual basis. This form of modulation spectroscopy is demonstrated on a GaInP/GaAs tandem solar cell. (Less)
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author
publishing date
type
Contribution to journal
publication status
published
subject
in
Applied Physics Letters
volume
114
issue
15
pages
153501 - 153501
publisher
AIP Publishing LLC
external identifiers
  • scopus:85065604274
ISSN
0003-6951
DOI
10.1063/1.5062602
language
English
LU publication?
no
id
2f931c72-0a45-4db0-b207-e236e4f4aba2
date added to LUP
2019-05-10 09:19:31
date last changed
2020-03-10 15:40:57
@article{2f931c72-0a45-4db0-b207-e236e4f4aba2,
  abstract     = {Electric coupling between subcells of a monolithically grown multijunction solar cell in short circuit allows their simultaneous and independent characterization by means of photo- and electro-reflectance. The photovoltage generated by selective absorption of the pump beam in a given subcell during photoreflectance measurements results in reverse biasing the complementary subunits at the modulation frequency set on the pump illumination. Such voltage bias modulation then acts as external perturbation on the complementary subcells. The spectral separation of different subcell absorption ranges permits the probe beam to record in a single spectrum the response of the complete device as a combination of photo- and electro-reflectance, thereby providing access for the diagnosis of subcells on an individual basis. This form of modulation spectroscopy is demonstrated on a GaInP/GaAs tandem solar cell.},
  author       = {Fuertes Marrón, D. and Barrigón, E. and Ochoa, M. and Artacho, I.},
  issn         = {0003-6951},
  language     = {eng},
  month        = {04},
  number       = {15},
  pages        = {153501--153501},
  publisher    = {AIP Publishing LLC},
  series       = {Applied Physics Letters},
  title        = {Combined photo- and electroreflectance of multijunction solar cells enabled by subcell electric coupling},
  url          = {http://dx.doi.org/10.1063/1.5062602},
  doi          = {10.1063/1.5062602},
  volume       = {114},
  year         = {2019},
}