Interband absorption of photons by extended states in intermediate band solar cells

Luque López, Antonio and Mellor Null, Alexander Virgil and Ramiro Gonzalez, Iñigo and Antolín Fernández, Elisa and Tobías Galicia, Ignacio and Martí Vega, Antonio (2013). Interband absorption of photons by extended states in intermediate band solar cells. "Solar Energy Materials And Solar Cells", v. 115 ; pp. 134-144. ISSN 0927-0248. https://doi.org/10.1016/j.solmat.2013.03.008.

Description

Title: Interband absorption of photons by extended states in intermediate band solar cells
Author/s:
  • Luque López, Antonio
  • Mellor Null, Alexander Virgil
  • Ramiro Gonzalez, Iñigo
  • Antolín Fernández, Elisa
  • Tobías Galicia, Ignacio
  • Martí Vega, Antonio
Item Type: Article
Título de Revista/Publicación: Solar Energy Materials And Solar Cells
Date: August 2013
ISSN: 0927-0248
Volume: 115
Subjects:
Freetext Keywords: Intermediate band solar cell; Quantum dot; Absorption coefficient
Faculty: E.T.S.I. Telecomunicación (UPM)
Department: Electrónica Física
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

This paper considers sub-bandgap photon absorption in an InAs/GaAs quantum dot matrix. Absorption coefficients are calculated for transitions from the extended states in the valence band to confined states in the conduction band. This completes a previous body of work in which transitions between bound states were calculated. The calculations are based on the empirical k·p Hamiltonian considering the quantum dots as parallelepipeds. The extended states may be only partially extended?in one or two dimensions?or extended in all three dimensions. It is found that extended-to-bound transitions are, in general, weaker than bound-to-bound transitions, and that the former are weaker when the initial state is extended in more coordinates. This study is of direct application to the research of intermediate band solar cells and other semiconductor devices based on light absorption in semiconductors nanostructured with quantum dots.

Funding Projects

TypeCodeAcronymLeaderTitle
FP7283798NGCPVUnspecifiedA new generation of concentrator photovoltaic cells, modules and systems

More information

Item ID: 26091
DC Identifier: http://oa.upm.es/26091/
OAI Identifier: oai:oa.upm.es:26091
DOI: 10.1016/j.solmat.2013.03.008
Official URL: http://www.sciencedirect.com/science/article/pii/S0927024813001219
Deposited by: Memoria Investigacion
Deposited on: 19 May 2014 19:12
Last Modified: 01 Aug 2015 22:56
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