{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2019:GMQXRNXRVVNQ3CPYBADUS6B5HX","short_pith_number":"pith:GMQXRNXR","schema_version":"1.0","canonical_sha256":"332178b6f1ad5b0d89f8080749783d3dd0174bff479525fd0426f7b9e71a8631","source":{"kind":"arxiv","id":"1907.13397","version":4},"attestation_state":"computed","paper":{"title":"Black-silicon ultraviolet photodiodes achieve external quantum efficiency above 130%","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["cond-mat.mtrl-sci","physics.ins-det"],"primary_cat":"physics.app-ph","authors_text":"A. Haarahiltunen, H. Savin, J. Heinonen, L. Werner, M. Garin, M. Juntunen, T.P. Pasanen, V. V\\\"ah\\\"anissi","submitted_at":"2019-07-31T10:00:47Z","abstract_excerpt":"At present, ultraviolet sensors are utilized in numerous fields ranging from various spectroscopy applications via biotechnical innovations to industrial process control. Despite of this, the performance of current UV sensors is surprisingly poor. Here, we break the theoretical one photon - one electron barrier and demonstrate a device with a certified external quantum efficiency (EQE) above 130% in UV range without external amplification. The record high performance is obtained using a nanostructured silicon photodiode with self-induced junction. We show that the high efficiency is based on e"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1907.13397","kind":"arxiv","version":4},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.app-ph","submitted_at":"2019-07-31T10:00:47Z","cross_cats_sorted":["cond-mat.mtrl-sci","physics.ins-det"],"title_canon_sha256":"401963411da64daf0b24d189f4e11a355bcea8bdde1b437c5adc70f5a7d250fb","abstract_canon_sha256":"74e90920131b309a4d4bd5b5fa6c27f326ecd69727b4539ba57aa3e37203c0bb"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T01:47:28.815312Z","signature_b64":"9L9kIj9SGrTk9AU66FVPRwHzpka6JRNhRCxYXIqQbbO+7XIjpQRdu0tkGYLkPLH6KnilQCQlvrAS686JXH4fAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"332178b6f1ad5b0d89f8080749783d3dd0174bff479525fd0426f7b9e71a8631","last_reissued_at":"2026-07-05T01:47:28.814928Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T01:47:28.814928Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Black-silicon ultraviolet photodiodes achieve external quantum efficiency above 130%","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["cond-mat.mtrl-sci","physics.ins-det"],"primary_cat":"physics.app-ph","authors_text":"A. Haarahiltunen, H. Savin, J. Heinonen, L. Werner, M. Garin, M. Juntunen, T.P. Pasanen, V. V\\\"ah\\\"anissi","submitted_at":"2019-07-31T10:00:47Z","abstract_excerpt":"At present, ultraviolet sensors are utilized in numerous fields ranging from various spectroscopy applications via biotechnical innovations to industrial process control. Despite of this, the performance of current UV sensors is surprisingly poor. Here, we break the theoretical one photon - one electron barrier and demonstrate a device with a certified external quantum efficiency (EQE) above 130% in UV range without external amplification. The record high performance is obtained using a nanostructured silicon photodiode with self-induced junction. We show that the high efficiency is based on e"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1907.13397","kind":"arxiv","version":4},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/1907.13397/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"aliases":[{"alias_kind":"arxiv","alias_value":"1907.13397","created_at":"2026-07-05T01:47:28.814982+00:00"},{"alias_kind":"arxiv_version","alias_value":"1907.13397v4","created_at":"2026-07-05T01:47:28.814982+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1907.13397","created_at":"2026-07-05T01:47:28.814982+00:00"},{"alias_kind":"pith_short_12","alias_value":"GMQXRNXRVVNQ","created_at":"2026-07-05T01:47:28.814982+00:00"},{"alias_kind":"pith_short_16","alias_value":"GMQXRNXRVVNQ3CPY","created_at":"2026-07-05T01:47:28.814982+00:00"},{"alias_kind":"pith_short_8","alias_value":"GMQXRNXR","created_at":"2026-07-05T01:47:28.814982+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/GMQXRNXRVVNQ3CPYBADUS6B5HX","json":"https://pith.science/pith/GMQXRNXRVVNQ3CPYBADUS6B5HX.json","graph_json":"https://pith.science/api/pith-number/GMQXRNXRVVNQ3CPYBADUS6B5HX/graph.json","events_json":"https://pith.science/api/pith-number/GMQXRNXRVVNQ3CPYBADUS6B5HX/events.json","paper":"https://pith.science/paper/GMQXRNXR"},"agent_actions":{"view_html":"https://pith.science/pith/GMQXRNXRVVNQ3CPYBADUS6B5HX","download_json":"https://pith.science/pith/GMQXRNXRVVNQ3CPYBADUS6B5HX.json","view_paper":"https://pith.science/paper/GMQXRNXR","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1907.13397&json=true","fetch_graph":"https://pith.science/api/pith-number/GMQXRNXRVVNQ3CPYBADUS6B5HX/graph.json","fetch_events":"https://pith.science/api/pith-number/GMQXRNXRVVNQ3CPYBADUS6B5HX/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/GMQXRNXRVVNQ3CPYBADUS6B5HX/action/timestamp_anchor","attest_storage":"https://pith.science/pith/GMQXRNXRVVNQ3CPYBADUS6B5HX/action/storage_attestation","attest_author":"https://pith.science/pith/GMQXRNXRVVNQ3CPYBADUS6B5HX/action/author_attestation","sign_citation":"https://pith.science/pith/GMQXRNXRVVNQ3CPYBADUS6B5HX/action/citation_signature","submit_replication":"https://pith.science/pith/GMQXRNXRVVNQ3CPYBADUS6B5HX/action/replication_record"}},"created_at":"2026-07-05T01:47:28.814982+00:00","updated_at":"2026-07-05T01:47:28.814982+00:00"}