The influence of quantum dot size on the sub-bandgap intraband photocurrent in intermediate band solar cells

Mellor Null, Alexander Virgil and Luque López, Antonio and Tobías Galicia, Ignacio and Martí Vega, Antonio (2012). The influence of quantum dot size on the sub-bandgap intraband photocurrent in intermediate band solar cells. "Applied Physics Letters", v. 101 (n. 13); pp.. ISSN 0003-6951. https://doi.org/10.1063/1.4755782.

Description

Title: The influence of quantum dot size on the sub-bandgap intraband photocurrent in intermediate band solar cells
Author/s:
  • Mellor Null, Alexander Virgil
  • Luque López, Antonio
  • Tobías Galicia, Ignacio
  • Martí Vega, Antonio
Item Type: Article
Título de Revista/Publicación: Applied Physics Letters
Date: September 2012
ISSN: 0003-6951
Volume: 101
Subjects:
Freetext Keywords: absorption coefficients, bound states, conduction bands, ground states, numerical analysis, photoconductivity, photoemission, quantum dots, size effect, solar cells
Faculty: E.T.S.I. Telecomunicación (UPM)
Department: Otro
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

The effect of quantum dot (QD) size on the performance of quantum dot intermediate band solar cells is investigated. A numerical model is used to calculate the bound state energy levels and the absorption coefficient of transitions from the ground state to all other states in the conduction band. Comparing with the current state of the art, strong absorption enhancements are found for smaller quantum dots, as well as a better positioning of the energy levels, which is expected to reduce thermal carrier escape. It is concluded that reducing the quantum dot size can increase sub-bandgap photocurrent and improve voltage preservation.

More information

Item ID: 16096
DC Identifier: http://oa.upm.es/16096/
OAI Identifier: oai:oa.upm.es:16096
DOI: 10.1063/1.4755782
Official URL: http://apl.aip.org/resource/1/applab/v101/i13/p133909_s1?isAuthorized=no
Deposited by: Memoria Investigacion
Deposited on: 06 Jul 2013 07:42
Last Modified: 21 Apr 2016 16:26
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