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Quantum well solar cell using ultrathin germanium nanoabsorber

Meddeb Dite Hasanet, Hosni and Osterthun, Norbert and Götz-Köhler, Maximilian and Sergeev, Oleg and Gehrke, Kai and Vehse, Martin and Agert, Carsten (2021) Quantum well solar cell using ultrathin germanium nanoabsorber. In: 47th IEEE Photovoltaic Specialists Conference, PVSC 2020, pp. 1149-1152. IEEE. 47th IEEE Photovoltaic Specialists Conference (PVSC) 2020, 15 June-21 Aug. 2020, Calgary, Canada. doi: 10.1109/PVSC45281.2020.9301016. ISBN 978-172816115-0. ISSN 0160-8371.

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Official URL: https://ieeexplore.ieee.org/document/9301016


Quantum-confining nanostructures are a key approach for efficient solar energy conversion in advanced designs of photovoltaic devices. In this study, we report the first demonstration of quantum confinement (QC) effects in single quantum well (QW) solar cells based on ultrathin hydrogenated amorphous germanium (a-Ge:H) nanoabsorber, using cost-effective, industrial-compatible and low-temperature production processes. The drastic reduction of a-Ge:H thickness in single QW solar cell, from 20 nm down below 2 nm, results in QC-tunable optoelectronic properties and photovoltaic characteristics, while maintaining a comparable power conversion level. For the overall efficiency, the decrease in the photo generation current density (J sc ) due to the reduction of nanoabsorber thickness is compensated by a major gain up to a factor of two in open-circuit voltage (V oc ) exceeding 700 mV and a considerable enhancement of the fill factor (FF) from 45 to 65 %. The successful demonstration of ultrathin a-Ge:H QW solar cells underlines the promising potential of bandgap engineering and multiple quantum confining nanostructures in our device technology with high relevance for semi-transparent power-generating systems, especially in window-integrated PV or in greenhouses, when combined with appropriate transparent conductive electrodes.

Item URL in elib:https://elib.dlr.de/147664/
Document Type:Conference or Workshop Item (Speech)
Title:Quantum well solar cell using ultrathin germanium nanoabsorber
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Meddeb Dite Hasanet, HosniUNSPECIFIEDhttps://orcid.org/0000-0001-8939-7910
Osterthun, NorbertUNSPECIFIEDhttps://orcid.org/0000-0003-2668-6605
Götz-Köhler, MaximilianUNSPECIFIEDhttps://orcid.org/0000-0002-6078-4359
Sergeev, OlegUNSPECIFIEDhttps://orcid.org/0000-0002-5022-6118
Gehrke, KaiUNSPECIFIEDhttps://orcid.org/0000-0002-0591-8289
Vehse, MartinUNSPECIFIEDhttps://orcid.org/0000-0003-0578-6121
Agert, CarstenUNSPECIFIEDhttps://orcid.org/0000-0003-4733-5257
Date:6 January 2021
Journal or Publication Title:47th IEEE Photovoltaic Specialists Conference, PVSC 2020
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Page Range:pp. 1149-1152
EditorsEmailEditor's ORCID iD
Meddeb, Hosnihosni.meddeb@dlr.dehttps://orcid.org/0000-0001-8939-7910
Osterthun, Norbertnorbert.osterthun@dlr.dehttps://orcid.org/0000-0003-2668-6605
Götz-Köhler, MaximilianMaximilian.Goetz@dlr.dehttps://orcid.org/0000-0002-6078-4359
Sergeev, Olegoleg.sergeev@dlr.dehttps://orcid.org/0000-0002-5022-6118
Gehrke, KaiKai.Gehrke@dlr.dehttps://orcid.org/0000-0002-0591-8289
Vehse, MartinMartin.Vehse@dlr.dehttps://orcid.org/0000-0003-0578-6121
Agert, Carstencarsten.agert@dlr.dehttps://orcid.org/0000-0003-4733-5257
Series Name:2020 47th IEEE Photovoltaic Specialists Conference (PVSC)
Keywords:ultrathin solar cell, semiconductor nanostructures, quantum well, quantum confinement, resonant absorbing nanocavity
Event Title:47th IEEE Photovoltaic Specialists Conference (PVSC) 2020
Event Location:Calgary, Canada
Event Type:international Conference
Event Dates:15 June-21 Aug. 2020
HGF - Research field:Energy
HGF - Program:Energy System Design
HGF - Program Themes:Digitalization and System Technology
DLR - Research area:Energy
DLR - Program:E SY - Energy System Technology and Analysis
DLR - Research theme (Project):E - Energy System Technology
Location: Oldenburg
Institutes and Institutions:Institute of Networked Energy Systems > Urban and Residential Technologies
Deposited By: Meddeb Dite Hasanet, Hosni
Deposited On:20 Dec 2021 18:41
Last Modified:20 Dec 2021 18:41

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