Implications of low breakdown voltage of component subcells on external quantum efficiency measurements of multijunction solar cells

Barrigón Montañés, Enrique and Espinet González, Pilar and Contreras, Yedileth and Rey-Stolle Prado, Ignacio (2015). Implications of low breakdown voltage of component subcells on external quantum efficiency measurements of multijunction solar cells. "Progress in Photovoltaics", v. 23 (n. 11); pp. 1597-1607. ISSN 1062-7995. https://doi.org/10.1002/pip.2597.

Description

Title: Implications of low breakdown voltage of component subcells on external quantum efficiency measurements of multijunction solar cells
Author/s:
  • Barrigón Montañés, Enrique
  • Espinet González, Pilar
  • Contreras, Yedileth
  • Rey-Stolle Prado, Ignacio
Item Type: Article
Título de Revista/Publicación: Progress in Photovoltaics
Date: November 2015
ISSN: 1062-7995
Volume: 23
Subjects:
Freetext Keywords: Ge subcell; breakdown voltage; external quantum efficiency; multijunction solar cells
Faculty: Instituto de Energía Solar (IES) (UPM)
Department: Otro
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

The electrical and optical coupling between subcells in a multijunction solar cell affects its external quantum efficiency (EQE) measurement. In this study, we show how a low breakdown voltage of a component subcell impacts the EQE determination of a multijunction solar cell and demands the use of a finely adjusted external voltage bias. The optimum voltage bias for the EQE measurement of a Ge subcell in two different GaInP/GaInAs/Ge triple-junction solar cells is determined both by sweeping the external voltage bias and by tracing the I–V curve under the same light bias conditions applied during the EQE measurement. It is shown that the I–V curve gives rapid and valuable information about the adequate light and voltage bias needed, and also helps to detect problems associated with non-ideal I–V curves that might affect the EQE measurement. The results also show that, if a non-optimum voltage bias is applied, a measurement artifact can result. Only when the problems associated with a non-ideal I–V curve and/or a low breakdown voltage have been discarded, the measurement artifacts, if any, can be attributed to other effects such as luminescent coupling between subcells.

Funding Projects

Type
Code
Acronym
Leader
Title
Government of Spain
IPT-2011-1441-920000
SIGMAPLANTAS
Abengoa Solar New Technologies S.A
La Innovación en las Plantas y Modelos de Sistemas de Concentración Fotovoltaica en España”
Government of Spain
TEC2011-28639-C02-01
Unspecified
Unspecified
Células solares para alta concentración con eficiencias superiores al 40%
Government of Spain
TEC2012-37286
Unspecified
Unspecified
Fabricación por MOVPE de células solares multiunion de. Semiconductores III-V sobre silicio
Government of Spain
IPT-2011-1408-420000
ENERGRAP
Graphenea S.A.
Grapheno en Aplicaciones de Energía
Madrid Regional Government
S2009/ENE1477
NUMANCIA II
Unspecified
Unspecified

More information

Item ID: 40866
DC Identifier: https://oa.upm.es/40866/
OAI Identifier: oai:oa.upm.es:40866
DOI: 10.1002/pip.2597
Official URL: http://onlinelibrary.wiley.com/doi/10.1002/pip.259...
Deposited by: Memoria Investigacion
Deposited on: 07 Sep 2016 18:01
Last Modified: 30 Nov 2022 09:00
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