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Broadband Photon Harvesting in Organic Photovoltaic Devices Induced by Large-Area Nanogrooved Templates

Chowdhury, Debasree; Mohamed, Shaimaa A.; Manzato, Giacomo; Siri, Beatrice; Chittofrati, Roberto; Giordano, Maria Caterina; Hussein, Mohamed 1; Hameed, Mohamed F. O.; Obayya, Salah S. A.; Stadler, Philipp; Scharber, Markus C.; Della Valle, Giuseppe; Buatier de Mongeot, Francesco
1 Lichttechnisches Institut (LTI), Karlsruher Institut für Technologie (KIT)

Abstract:

Thin-film organic photovoltaic (OPV) devices represent an attractive alternative to conventional silicon solar cells due to their lightweight, flexibility, and low cost. However, the relatively low optical absorption of the OPV active layers still represents an open issue in view of efficient devices that cannot be addressed by adopting conventional light coupling strategies derived from thick PV absorbers. The light coupling to thin-film solar cells can be boosted by nanostructuring the device interfaces at the subwavelength scale. Here, we demonstrate broadband and omnidirectional photon harvesting in thin-film OPV devices enabled by highly ordered one-dimensional (1D) arrays of nanogrooves. Laser interference lithography, in combination with reactive ion etching (RIE), provides the controlled tailoring of the height and periodicity of the silica grooves, enabling effective tuning of the anti-reflection properties in the active organic layer (PTB7:PCBM). With this strategy, we demonstrate a strong enhancement of the optical absorption, as high as 19% with respect to a flat device, over a broadband visible and near-infrared spectrum. ... mehr


Verlagsausgabe §
DOI: 10.5445/IR/1000158008
Veröffentlicht am 02.05.2023
Originalveröffentlichung
DOI: 10.1021/acsanm.3c00553
Scopus
Zitationen: 1
Dimensions
Zitationen: 1
Cover der Publikation
Zugehörige Institution(en) am KIT Lichttechnisches Institut (LTI)
Publikationstyp Zeitschriftenaufsatz
Publikationsdatum 14.04.2023
Sprache Englisch
Identifikator ISSN: 2574-0970
KITopen-ID: 1000158008
Erschienen in ACS Applied Nano Materials
Verlag American Chemical Society (ACS)
Band 6
Heft 7
Seiten 6230–6240
Vorab online veröffentlicht am 03.04.2023
Nachgewiesen in Web of Science
Dimensions
Scopus
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