Impact of spatial separation of type‐II GaSb quantum dots from the depletion region on the conversion efficiency limit of GaAs solar cells

A Kechiantz, A Afanasev… - Progress in Photovoltaics …, 2015 - Wiley Online Library
The purpose of this work is to look for a practical structure for application of quantum dots
(QDs) in solar cells. We focus on a stack of strain‐compensated GaSb/GaAs type‐II QDs. We …

Optical absorption coefficient calculations of GaSb/GaAs quantum dots for intermediate band solar cell applications

M Kunrugsa - Journal of Physics D: Applied Physics, 2020 - iopscience.iop.org
Abstract Absorption coefficients of GaSb/GaAs quantum dots (QDs) are calculated by the 8-
band strain-dependent k· p method and Fermi's golden rule. A more realistic but simple …

Two-dimensional simulation of GaAsSb/GaAs quantum dot solar cells

M Kunrugsa - Journal of Physics D: Applied Physics, 2018 - iopscience.iop.org
Abstract Two-dimensional (2D) simulation of GaAsSb/GaAs quantum dot (QD) solar cells is
presented. The effects of As mole fraction in GaAsSb QDs on the performance of the solar …

Preserving voltage and long wavelength photoresponse in GaSb/GaAs quantum dot solar cells

J Hwang, AJ Martin, K Lee, S Forrest… - 2013 IEEE 39th …, 2013 - ieeexplore.ieee.org
Improvement in the open circuit voltage of the GaSb/GaAs quantum dot intermediate band
solar cell is achieved by compensating thermionic hole emission of the quantum dots with n …

GaSb∕ GaAs type II quantum dot solar cells for enhanced infrared spectral response

RB Laghumavarapu, A Moscho… - Applied Physics …, 2007 - pubs.aip.org
The authors report an enhanced infrared spectral response of GaAs-based solar cells that
incorporate type II GaSb quantum dots (QDs) formed using interfacial misfit array growth …

GaSb/InGaAs quantum dot–well hybrid structure active regions in solar cells

RB Laghumavarapu, BL Liang, ZS Bittner… - Solar energy materials …, 2013 - Elsevier
GaSb/InGaAs quantum dot–well (QDW) hybrid active regions with type-II band alignment are
explored for increasing the infrared absorption in GaAs solar cells. Analyzed GaAs p–i–n …

Analysis of the intermediate-band absorption properties of type-II GaSb/GaAs quantum-dot photovoltaics

I Ramiro, J Villa, C Tablero, E Antolín, A Luque, A Martí… - Physical Review B, 2017 - APS
Quantum-dot (QD) intermediate-band (IB) materials are regarded as promising candidates
for high-efficiency photovoltaics. The sequential two-step two-photon absorption processes …

Three-bandgap absolute quantum efficiency in GaSb/GaAs quantum dot intermediate band solar cells

I Ramiro, E Antolín, J Hwang, A Teran… - IEEE Journal of …, 2016 - ieeexplore.ieee.org
In this work, we study type-II GaSb/GaAs quantum-dot intermediate band solar cells (IBSCs)
by means of quantum efficiency (QE) measurements. We are able, for the first time, to …

Modeling and simulation of GaSb/GaAs quantum dot for solar cell

F Benyettou, A Aissat, MA Benamar, JP Vilcot - Energy Procedia, 2015 - Elsevier
The main limitations of the conventional solar conversion device is that low energy photons
cannot excite charge carriers to the conduction band, therefore do not contribute to the …

Contribution of a single quantum dots layer in intermediate band solar cells: A capacitance analysis

H Boustanji, S Jaziri, JL Lazzari - Solar Energy Materials and Solar Cells, 2017 - Elsevier
Theoretical model and numerical analysis of charge accumulation within a single GaSb
quantum dots layer embedded in GaAs-based Schottky diode is performed. We hereby give …