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Ultrathin Solar Cell With Magnesium-Based Optical Switching for Window Applications

Götz-Köhler, Maximilian and Meddeb, Hosni and Gehrke, Kai and Vehse, Martin and Agert, Carsten (2021) Ultrathin Solar Cell With Magnesium-Based Optical Switching for Window Applications. IEEE Journal of Photovoltaics, 11 (6), pp. 1388-1394. IEEE - Institute of Electrical and Electronics Engineers. doi: 10.1109/JPHOTOV.2021.3110311. ISSN 2156-3381.

[img] PDF - Postprint version (accepted manuscript)

Official URL: http://dx.doi.org/10.1109/JPHOTOV.2021.3110311


Photovoltaic windows that can be switched between transparent and energy harvesting mode can be realized by using ultrathin solar absorbers embedded in an optical nanocavity. In the present work, we use a 5 nm thick amorphous germanium absorber integrated in a magnesium-based thin film optical cavity, which switches from an absorptive to a transparent state due to hydrogen absorption. We analyze the influence of the mirror layer thickness on the light absorption, photocurrent generation, and transmission as well as color neutrality of the device. The optical properties are studied by 1-D transfer-matrix method by changing Mg thickness between 0 and 100 nm, then compared to the experimental results of fabricated devices. When the thickness of Mg increases, the switchable average transparency varies between 25% and 0%, while the power conversion efficiency rises up to 2.3%. The applicability of the device is tested by modeling the annual power generation in realistic scenarios. The influence of the cardinal orientation and the seasons on the switchable photovoltaic window implemented in a building facade with the abovementioned parameters is analyzed for different switching scenarios.

Item URL in elib:https://elib.dlr.de/144185/
Document Type:Article
Title:Ultrathin Solar Cell With Magnesium-Based Optical Switching for Window Applications
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Götz-Köhler, MaximilianUNSPECIFIEDhttps://orcid.org/0000-0002-6078-4359UNSPECIFIED
Meddeb, HosniUNSPECIFIEDhttps://orcid.org/0000-0001-8939-7910UNSPECIFIED
Gehrke, KaiUNSPECIFIEDhttps://orcid.org/0000-0002-0591-8289UNSPECIFIED
Vehse, MartinUNSPECIFIEDhttps://orcid.org/0000-0003-0578-6121UNSPECIFIED
Agert, CarstenUNSPECIFIEDhttps://orcid.org/0000-0003-4733-5257UNSPECIFIED
Date:23 September 2021
Journal or Publication Title:IEEE Journal of Photovoltaics
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:Yes
Page Range:pp. 1388-1394
Publisher:IEEE - Institute of Electrical and Electronics Engineers
Keywords:Magnesium optical switching, smart window, switchable solar cell, ultrathin solar cell
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: Götz, Maximilian
Deposited On:01 Nov 2021 09:42
Last Modified:19 Nov 2021 20:41

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