{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:GULNVRAEFI4MUWQKVDAJCO5ZUU","short_pith_number":"pith:GULNVRAE","canonical_record":{"source":{"id":"1805.01346","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2018-05-03T14:59:21Z","cross_cats_sorted":["cond-mat.mtrl-sci"],"title_canon_sha256":"ded9e283c4bb0ecdbb925e3c30f554f6fb266201c22e600d3ea8b842f89bd034","abstract_canon_sha256":"b2da3b2aad4f53e4512f34b71ce8aeb0ab1934518e2dde78fc4df9f196be99d5"},"schema_version":"1.0"},"canonical_sha256":"3516dac4042a38ca5a0aa8c0913bb9a504dfc92fa6ddf193f0aacc444f98303c","source":{"kind":"arxiv","id":"1805.01346","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1805.01346","created_at":"2026-05-18T00:16:51Z"},{"alias_kind":"arxiv_version","alias_value":"1805.01346v1","created_at":"2026-05-18T00:16:51Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1805.01346","created_at":"2026-05-18T00:16:51Z"},{"alias_kind":"pith_short_12","alias_value":"GULNVRAEFI4M","created_at":"2026-05-18T12:32:25Z"},{"alias_kind":"pith_short_16","alias_value":"GULNVRAEFI4MUWQK","created_at":"2026-05-18T12:32:25Z"},{"alias_kind":"pith_short_8","alias_value":"GULNVRAE","created_at":"2026-05-18T12:32:25Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:GULNVRAEFI4MUWQKVDAJCO5ZUU","target":"record","payload":{"canonical_record":{"source":{"id":"1805.01346","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2018-05-03T14:59:21Z","cross_cats_sorted":["cond-mat.mtrl-sci"],"title_canon_sha256":"ded9e283c4bb0ecdbb925e3c30f554f6fb266201c22e600d3ea8b842f89bd034","abstract_canon_sha256":"b2da3b2aad4f53e4512f34b71ce8aeb0ab1934518e2dde78fc4df9f196be99d5"},"schema_version":"1.0"},"canonical_sha256":"3516dac4042a38ca5a0aa8c0913bb9a504dfc92fa6ddf193f0aacc444f98303c","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:16:51.650800Z","signature_b64":"q1xzVQEsKgrhRqol3tmumjsPstyIzYTAoc0SVYRiuUFS3BefzUc/Jj4T9BwXIWAEgLA85b4Ys+ObP87LtxspBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"3516dac4042a38ca5a0aa8c0913bb9a504dfc92fa6ddf193f0aacc444f98303c","last_reissued_at":"2026-05-18T00:16:51.650202Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:16:51.650202Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1805.01346","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:16:51Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"4f7rI/efN1D0zn9xbnipYtBYF0dpRuI05ttXDCMjq8g+psRvIpjyQUEvEogBcj2Dgy4ol1BHdWdfeaMdQ97aCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-09T18:17:20.045955Z"},"content_sha256":"e4812a737a36030e46046d3872e6ca36fb7f092368d0fe05369af2712dd25639","schema_version":"1.0","event_id":"sha256:e4812a737a36030e46046d3872e6ca36fb7f092368d0fe05369af2712dd25639"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:GULNVRAEFI4MUWQKVDAJCO5ZUU","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Graphene-Based Hole Selective Layers for High-Efficiency, Solution-Processed, Large-Area, Flexible, Hydrogen-Evolving Organic Photocathodes","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.mtrl-sci"],"primary_cat":"physics.app-ph","authors_text":"Alebrto Ansaldo, Antonio Esau Del Rio Castillo, Beatriz Mart\\'in-Garc\\'ia, Francesco Bonaccorso, Iwan Moreels, Leyla Najafi, Mirko Prato, Sebastiano Bellani","submitted_at":"2018-05-03T14:59:21Z","abstract_excerpt":"Regio-regular poly(3-hexylthiophene-2,5-diyl) (rr-P3HT), the work-horse of organic photovoltaics, has been recently exploited in bulk heterojunction (BHJ) configuration with phenyl-C61-butyric acid methyl ester (PCBM) for solution-processed hydrogen-evolving photocathodes, reaching cathodic photocurrents at 0 V vs. RHE (J0V vs RHE) of up to 8 mA cm-2. The photoelectrochemical performance of these photocathodes strongly depends on the presence of the electron (ESL) and hole (HSL) selective layer. While TiO2 and its sub-stoichiometric phases are consolidated ESL materials, the currently used HSL"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1805.01346","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:16:51Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"DdaOiLzBqgjnoNvv220qx9kk5gz9ER8NDzONeZbeV0dOeOapRDjTVx+gsOMsvz8YIDHfP5KZmwLX45o6OfHRCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-09T18:17:20.046726Z"},"content_sha256":"0ed2ecdd22bccd0e81ae0fd16d456c1f2b721501a7b727ee62369b12cedeb7ba","schema_version":"1.0","event_id":"sha256:0ed2ecdd22bccd0e81ae0fd16d456c1f2b721501a7b727ee62369b12cedeb7ba"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/GULNVRAEFI4MUWQKVDAJCO5ZUU/bundle.json","state_url":"https://pith.science/pith/GULNVRAEFI4MUWQKVDAJCO5ZUU/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/GULNVRAEFI4MUWQKVDAJCO5ZUU/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-06-09T18:17:20Z","links":{"resolver":"https://pith.science/pith/GULNVRAEFI4MUWQKVDAJCO5ZUU","bundle":"https://pith.science/pith/GULNVRAEFI4MUWQKVDAJCO5ZUU/bundle.json","state":"https://pith.science/pith/GULNVRAEFI4MUWQKVDAJCO5ZUU/state.json","well_known_bundle":"https://pith.science/.well-known/pith/GULNVRAEFI4MUWQKVDAJCO5ZUU/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:GULNVRAEFI4MUWQKVDAJCO5ZUU","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"b2da3b2aad4f53e4512f34b71ce8aeb0ab1934518e2dde78fc4df9f196be99d5","cross_cats_sorted":["cond-mat.mtrl-sci"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2018-05-03T14:59:21Z","title_canon_sha256":"ded9e283c4bb0ecdbb925e3c30f554f6fb266201c22e600d3ea8b842f89bd034"},"schema_version":"1.0","source":{"id":"1805.01346","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1805.01346","created_at":"2026-05-18T00:16:51Z"},{"alias_kind":"arxiv_version","alias_value":"1805.01346v1","created_at":"2026-05-18T00:16:51Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1805.01346","created_at":"2026-05-18T00:16:51Z"},{"alias_kind":"pith_short_12","alias_value":"GULNVRAEFI4M","created_at":"2026-05-18T12:32:25Z"},{"alias_kind":"pith_short_16","alias_value":"GULNVRAEFI4MUWQK","created_at":"2026-05-18T12:32:25Z"},{"alias_kind":"pith_short_8","alias_value":"GULNVRAE","created_at":"2026-05-18T12:32:25Z"}],"graph_snapshots":[{"event_id":"sha256:0ed2ecdd22bccd0e81ae0fd16d456c1f2b721501a7b727ee62369b12cedeb7ba","target":"graph","created_at":"2026-05-18T00:16:51Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"paper":{"abstract_excerpt":"Regio-regular poly(3-hexylthiophene-2,5-diyl) (rr-P3HT), the work-horse of organic photovoltaics, has been recently exploited in bulk heterojunction (BHJ) configuration with phenyl-C61-butyric acid methyl ester (PCBM) for solution-processed hydrogen-evolving photocathodes, reaching cathodic photocurrents at 0 V vs. RHE (J0V vs RHE) of up to 8 mA cm-2. The photoelectrochemical performance of these photocathodes strongly depends on the presence of the electron (ESL) and hole (HSL) selective layer. While TiO2 and its sub-stoichiometric phases are consolidated ESL materials, the currently used HSL","authors_text":"Alebrto Ansaldo, Antonio Esau Del Rio Castillo, Beatriz Mart\\'in-Garc\\'ia, Francesco Bonaccorso, Iwan Moreels, Leyla Najafi, Mirko Prato, Sebastiano Bellani","cross_cats":["cond-mat.mtrl-sci"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2018-05-03T14:59:21Z","title":"Graphene-Based Hole Selective Layers for High-Efficiency, Solution-Processed, Large-Area, Flexible, Hydrogen-Evolving Organic Photocathodes"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1805.01346","kind":"arxiv","version":1},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:e4812a737a36030e46046d3872e6ca36fb7f092368d0fe05369af2712dd25639","target":"record","created_at":"2026-05-18T00:16:51Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"b2da3b2aad4f53e4512f34b71ce8aeb0ab1934518e2dde78fc4df9f196be99d5","cross_cats_sorted":["cond-mat.mtrl-sci"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2018-05-03T14:59:21Z","title_canon_sha256":"ded9e283c4bb0ecdbb925e3c30f554f6fb266201c22e600d3ea8b842f89bd034"},"schema_version":"1.0","source":{"id":"1805.01346","kind":"arxiv","version":1}},"canonical_sha256":"3516dac4042a38ca5a0aa8c0913bb9a504dfc92fa6ddf193f0aacc444f98303c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"3516dac4042a38ca5a0aa8c0913bb9a504dfc92fa6ddf193f0aacc444f98303c","first_computed_at":"2026-05-18T00:16:51.650202Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:16:51.650202Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"q1xzVQEsKgrhRqol3tmumjsPstyIzYTAoc0SVYRiuUFS3BefzUc/Jj4T9BwXIWAEgLA85b4Ys+ObP87LtxspBg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:16:51.650800Z","signed_message":"canonical_sha256_bytes"},"source_id":"1805.01346","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e4812a737a36030e46046d3872e6ca36fb7f092368d0fe05369af2712dd25639","sha256:0ed2ecdd22bccd0e81ae0fd16d456c1f2b721501a7b727ee62369b12cedeb7ba"],"state_sha256":"fe03ca57c1d296f7c25838cc166710d51985b7c6fe4f4ac3c294326320fb6d22"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"jPKN6Sj0f3syRxUM4zxCFQ6IPWDLI4NEqdnXPpk2ghkrcby5afe2HYiiB+MBtA8FNlNHD2d82XtGtv7S7Y/mCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-09T18:17:20.050610Z","bundle_sha256":"88a6a9b7078e0701d616c49ef1734e4bbb6d7d9338ab7360382f0a9bd7bc7a09"}}