Liquid Metal-Exfoliated SnO₂-Based Mixed-Dimensional Heterostructures for Visible-to-Near-Infrared Photodetection

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dc.contributor.authorNath, S.K.
dc.contributor.authorSyed, N.
dc.contributor.authorPan, W.
dc.contributor.authorYu, Y.
dc.contributor.authorLiu, D.
dc.contributor.authorNielsen, M.P.
dc.contributor.authorYuwono, J.
dc.contributor.authorKumar, P.V.
dc.contributor.authorZhu, Y.
dc.contributor.authorCortie, D.L.
dc.contributor.authorNguyen, C.K.
dc.contributor.authorFu, L.
dc.contributor.authorRoberts, A.
dc.contributor.authorFaraone, L.
dc.contributor.authorEkins-Daukes, N.J.
dc.contributor.authorLei, W.
dc.date.issued2025
dc.description.abstractUltra-thin 2D materials have gain significant attention for making next-generation optoelectronic devices. Here, a large-area heterojunction photodetector is fabricated using a liquid metal-printed 2D SnO₂ layer transferred onto CdTe thin films. The resulting device demonstrates efficient broadband light sensing from visible to near-infrared wavelengths, with enhanced detectivity and faster photo response. Significantly, the device shows a ≈10⁵-fold increase in current than the dark current level when illuminated with a 780 nm laser and achieves a specific detectivity of ≈10¹² Jones, nearly two orders of magnitude higher than that of a standalone CdTe device. Additionally, temperature-dependent optoelectronic testing shows that the device maintains a stable response up to 140 °C and generates distinctive photocurrent at temperatures up to 80 °C, demonstrating its thermal stability. Through band structure analysis, DFT calculations, and photocurrent mapping, the formation of a p-n junction is confirmed, which enhances carrier separation via the built-in potential, significantly boosting photoresponse. These results highlight the potential of liquid metal-derived 2D materials in heterostructure integration, paving the way for advanced optoelectronic applications.
dc.description.statementofresponsibilityShimul Kanti Nath, Nitu Syed, Wenwu Pan, Yang Yu, Dawei Liu, Michael P. Nielsen, Jodie Yuwono, Priyank V. Kumar, Yan Zhu, David L. Cortie, Chung K. Nguyen, Lan Fu, Ann Roberts, Lorenzo Faraone, Nicholas J. Ekins-Daukes, and Wen Lei
dc.identifier.citationAdvanced Optical Materials, 2025; 13(25):e00765-1-e00765-10
dc.identifier.doi10.1002/adom.202500765
dc.identifier.issn2195-1071
dc.identifier.issn2195-1071
dc.identifier.orcidYuwono, J. [0000-0002-0915-0756]
dc.identifier.urihttps://hdl.handle.net/2440/147670
dc.language.isoen
dc.publisherWiley
dc.relation.granthttp://purl.org/au-research/grants/arc/DP220101532
dc.rights© 2025 The Author(s). Advanced Optical Materials published by Wiley-VCH GmbH. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
dc.source.urihttps://doi.org/10.1002/adom.202500765
dc.subject2D; DFT; heterostructure; liquid metal; photocurrent mapping; vis–NIR photodetection
dc.titleLiquid Metal-Exfoliated SnO₂-Based Mixed-Dimensional Heterostructures for Visible-to-Near-Infrared Photodetection
dc.title.alternativeLiquid Metal-Exfoliated SnO(2)-Based Mixed-Dimensional Heterostructures for Visible-to-Near-Infrared Photodetection
dc.typeJournal article
pubs.publication-statusPublished online

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