Semiconductor thin film based metasurfaces and metamaterials for photovoltaic and photoelectrochemical water splitting applications

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buir.contributor.authorGhobadi, Ghobadi
buir.contributor.authorGhobadi, Türkan Gamze Ulusoy
buir.contributor.authorKaradaş, Ferdi
buir.contributor.authorÖzbay, Ekmel
buir.contributor.orcidÖzbay, Ekmel|0000-0003-2953-1828
dc.citation.epage1900028-39en_US
dc.citation.issueNumber14en_US
dc.citation.spage1900028-1en_US
dc.citation.volumeNumber7en_US
dc.contributor.authorGhobadi, Amiren_US
dc.contributor.authorGhobadi, Türkan Gamze Ulusoyen_US
dc.contributor.authorKaradaş, Ferdien_US
dc.contributor.authorÖzbay, Ekmelen_US
dc.date.accessioned2020-02-10T07:02:51Z
dc.date.available2020-02-10T07:02:51Z
dc.date.issued2019
dc.departmentDepartment of Chemistryen_US
dc.departmentDepartment of Electrical and Electronics Engineeringen_US
dc.departmentDepartment of Physicsen_US
dc.departmentInstitute of Materials Science and Nanotechnology (UNAM)en_US
dc.departmentNanotechnology Research Center (NANOTAM)en_US
dc.description.abstractIn both photovoltaic (PV) and photoelectrochemical water splitting (PEC‐WS) solar conversion devices, the ultimate aim is to design highly efficient, low cost, and large‐scale compatible cells. To achieve this goal, the main step is the efficient coupling of light into active layer. This can be obtained in bulky semiconductor‐based designs where the active layer thickness is larger than light penetration depth. However, most low‐bandgap semiconductors have a carrier diffusion length much smaller than the light penetration depth. Thus, photogenerated electron–hole pairs will recombine within the semiconductor bulk. Therefore, an efficient design should fully harvest light in dimensions in the order of the carriers' diffusion length to maximize their collection probability. For this aim, in recent years, many studies based on metasurfaces and metamaterials were conducted to obtain broadband and near‐unity light absorption in subwavelength ultrathin semiconductor thicknesses. This review summarizes these strategies in five main categories: light trapping based on i) strong interference in planar multilayer cavities, ii) metal nanounits, iii) dielectric units, iv) designed semiconductor units, and v) trapping scaffolds. The review highlights recent studies in which an ultrathin active layer has been coupled to the above‐mentioned trapping schemes to maximize the cell optical performance.en_US
dc.description.provenanceSubmitted by Onur Emek (onur.emek@bilkent.edu.tr) on 2020-02-10T07:02:51Z No. of bitstreams: 1 Bilkent-research-paper.pdf: 268963 bytes, checksum: ad2e3a30c8172b573b9662390ed2d3cf (MD5)en
dc.description.provenanceMade available in DSpace on 2020-02-10T07:02:51Z (GMT). No. of bitstreams: 1 Bilkent-research-paper.pdf: 268963 bytes, checksum: ad2e3a30c8172b573b9662390ed2d3cf (MD5) Previous issue date: 2019en
dc.description.sponsorshipTUBITAK. Grant Numbers: 113E331, 114E374, 115F560en_US
dc.description.sponsorshipTurkish Academy of Sciencesen_US
dc.embargo.release2020-07-19
dc.identifier.doi10.1002/adom.201900028en_US
dc.identifier.issn2195-1071
dc.identifier.urihttp://hdl.handle.net/11693/53206
dc.language.isoEnglishen_US
dc.publisherWILEY-VCH Verlag GmbH & Co. KGaA, Weinheimen_US
dc.relation.isversionofhttps://doi.org/10.1002/adom.201900028en_US
dc.source.titleAdvanced Optical Materialsen_US
dc.subjectLight trappingen_US
dc.subjectMetamaterialsen_US
dc.subjectMetasurfacesen_US
dc.subjectPhotovoltaicsen_US
dc.subjectWater splittingen_US
dc.titleSemiconductor thin film based metasurfaces and metamaterials for photovoltaic and photoelectrochemical water splitting applicationsen_US
dc.typeReviewen_US

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Nanotechnology Research Center (NANOTAM)
Department of Chemistry
Department of Electrical and Electronics Engineering
Department of Physics
Institute of Materials Science and Nanotechnology (UNAM)