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Titanium dioxide (TiO<jats:sub>2<\/jats:sub>) honeycomb arrays with different geometry are engineered through a highly\u2010scalable colloidal lithography method on flat crystalline silicon (c\u2010Si) wafers and tested on standard planar c\u2010Si interdigitated back\u2010contact solar cells (pIBCSCs). The photonic\u2010structured wafers achieve an optical photocurrent of 36.6\u00a0mA cm<jats:sup>\u22122<\/jats:sup>, mainly due to a broad anti\u2010reflection effect from the 693\u00a0nm thick nanostructured coatings. In contrast, the pIBCSC test devices reach 14% efficiency with 679\u00a0nm thick TiO<jats:sub>2<\/jats:sub> nanostructures, corresponding to a \u224830% efficiency gain relative to uncoated pIBCSCs. In addition, several designed structures show unmatched angular acceptance enhancements in efficiency (up to 63% gain) and photocurrent density (up to 68% gain). The high\u2010performing (yet electrically harmless) LT scheme, here presented, entails an up\u2010and\u2010coming alternative to conventional texturing for c\u2010Si technological improvement that can be straightforwardly integrated into the established PV industry.<\/jats:p>","DOI":"10.1002\/adom.202300276","type":"journal-article","created":{"date-parts":[[2023,5,2]],"date-time":"2023-05-02T00:00:27Z","timestamp":1682985627000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":13,"title":["Optically\u2010Boosted Planar IBC Solar Cells with Electrically\u2010Harmless Photonic Nanocoatings"],"prefix":"10.1002","volume":"11","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-6593-8698","authenticated-orcid":false,"given":"Ivan M.","family":"Santos","sequence":"first","affiliation":[{"name":"CENIMAT\/I3N, Departamento de Ci\u00eancia dos Materiais, Faculdade de Ci\u00eancias e Tecnologia (FCT) Universidade Nova de Lisboa and 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