{"database":"biostudies-literature","file_versions":[],"scores":null,"additional":{"submitter":["Liu C"],"funding":["China National Funds for Distinguished Young Scientists"],"pagination":["3821"],"full_dataset_link":["https://www.ebi.ac.uk/biostudies/studies/S-EPMC12019331"],"repository":["biostudies-literature"],"omics_type":["Unknown"],"volume":["16(1)"],"pubmed_abstract":["Barrier detectors such as nBn and pBp architectures (formed by a n- or p-type contact layer, a barrier layer and a n- or p-type absorber) aim to block one carrier type while allowing the other to pass, but require complex hetero-integration and precise band engineering. Here, we propose an ultra-thin polar barrier strategy using a 0.75 nm water-intercalated WSe<sub>2</sub>/H<sub>2</sub>O/PdSe<sub>2</sub> heterostructure. The confined water layer forms a clean, well-ordered interface and further generates a precisely oriented polarization field that depletes electrons in WSe<sub>2</sub>, significantly suppressing dark current to sub-pA levels across all biases, while enabling efficient tunneling of photogenerated holes. The device shows broadband photoresponse from the ultraviolet to mid-wave infrared (MWIR), with a room-temperature average detectivity exceeding 10¹⁰ cm Hz¹<sup>/</sup>² W⁻¹ in the MWIR. It also features ultrafast response (~3 μs), polarization light sensitivity, and two-year stability. Our work establishes a platform for high-performance infrared photodetection via van der Waals gap engineering."],"journal":["Nature communications"],"pubmed_title":["Sub-pA dark current infrared photodetection enabled by polarized water-intercalated heterojunctions."],"pmcid":["PMC12019331"],"funding_grant_id":["61925403"],"pubmed_authors":["Xu P","Lv Y","Chen L","Qin Y","Wang F","Zhang S","Liu X","Zou X","Liu Y","Liao L","Tang L","Ma C","Wang P","Zhao S","Ding S","Zhang X","Liu C","Wang X","Wang EG"],"additional_accession":[]},"is_claimable":false,"name":"Sub-pA dark current infrared photodetection enabled by polarized water-intercalated heterojunctions.","description":"Barrier detectors such as nBn and pBp architectures (formed by a n- or p-type contact layer, a barrier layer and a n- or p-type absorber) aim to block one carrier type while allowing the other to pass, but require complex hetero-integration and precise band engineering. Here, we propose an ultra-thin polar barrier strategy using a 0.75 nm water-intercalated WSe<sub>2</sub>/H<sub>2</sub>O/PdSe<sub>2</sub> heterostructure. The confined water layer forms a clean, well-ordered interface and further generates a precisely oriented polarization field that depletes electrons in WSe<sub>2</sub>, significantly suppressing dark current to sub-pA levels across all biases, while enabling efficient tunneling of photogenerated holes. The device shows broadband photoresponse from the ultraviolet to mid-wave infrared (MWIR), with a room-temperature average detectivity exceeding 10¹⁰ cm Hz¹<sup>/</sup>² W⁻¹ in the MWIR. It also features ultrafast response (~3 μs), polarization light sensitivity, and two-year stability. Our work establishes a platform for high-performance infrared photodetection via van der Waals gap engineering.","dates":{"release":"2025-01-01T00:00:00Z","publication":"2025 Apr","modification":"2025-07-10T03:08:49.499Z","creation":"2025-07-10T03:08:49.499Z"},"accession":"S-EPMC12019331","cross_references":{"pubmed":["40268920"],"doi":["10.1038/s41467-025-59211-5"]}}