{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:OLVHKHYLPPWO3XPTTGBWDETGOD","short_pith_number":"pith:OLVHKHYL","canonical_record":{"source":{"id":"1906.03545","kind":"arxiv","version":5},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2019-06-09T00:03:22Z","cross_cats_sorted":[],"title_canon_sha256":"4201b3b08a8caa65e5fe830427d9fe8a116f3fcbebf9adeca86f45724a151aa8","abstract_canon_sha256":"7736a54e8039efe3a9ab4b1778cebcaa443b979d60f9a387ea04f1cb5964b43a"},"schema_version":"1.0"},"canonical_sha256":"72ea751f0b7becedddf3998361926670d28b0d25a5d97057ed9e5571bce79218","source":{"kind":"arxiv","id":"1906.03545","version":5},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1906.03545","created_at":"2026-07-05T00:50:43Z"},{"alias_kind":"arxiv_version","alias_value":"1906.03545v5","created_at":"2026-07-05T00:50:43Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1906.03545","created_at":"2026-07-05T00:50:43Z"},{"alias_kind":"pith_short_12","alias_value":"OLVHKHYLPPWO","created_at":"2026-07-05T00:50:43Z"},{"alias_kind":"pith_short_16","alias_value":"OLVHKHYLPPWO3XPT","created_at":"2026-07-05T00:50:43Z"},{"alias_kind":"pith_short_8","alias_value":"OLVHKHYL","created_at":"2026-07-05T00:50:43Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:OLVHKHYLPPWO3XPTTGBWDETGOD","target":"record","payload":{"canonical_record":{"source":{"id":"1906.03545","kind":"arxiv","version":5},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2019-06-09T00:03:22Z","cross_cats_sorted":[],"title_canon_sha256":"4201b3b08a8caa65e5fe830427d9fe8a116f3fcbebf9adeca86f45724a151aa8","abstract_canon_sha256":"7736a54e8039efe3a9ab4b1778cebcaa443b979d60f9a387ea04f1cb5964b43a"},"schema_version":"1.0"},"canonical_sha256":"72ea751f0b7becedddf3998361926670d28b0d25a5d97057ed9e5571bce79218","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T00:50:43.080125Z","signature_b64":"CPD4dVV/F7djLgmqSW1yB46M53HuEZvY2Kjy9ybW72nZbYs0k7NqVz/YJ5zCXU/ss+IT6VYVmryqVwWep85rCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"72ea751f0b7becedddf3998361926670d28b0d25a5d97057ed9e5571bce79218","last_reissued_at":"2026-07-05T00:50:43.079620Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T00:50:43.079620Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1906.03545","source_version":5,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T00:50:43Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"N7LOH5gsC9RuRymcu5c6bEIhtL2aC7vDja+1Ci6XiAYuHbpOi/+dt/dSJZM0wi3PxfkcRf7+fJ/tAeBmLYcADQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-22T12:10:35.148539Z"},"content_sha256":"a65d31a167293d9d344ba261bfb09efb33e6312f811dcc2c3fe2c277884fcabd","schema_version":"1.0","event_id":"sha256:a65d31a167293d9d344ba261bfb09efb33e6312f811dcc2c3fe2c277884fcabd"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:OLVHKHYLPPWO3XPTTGBWDETGOD","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Inorganic photovoltaic cells based on BiFeO3: spontaneous polarization, lattice matching, light polarization and their relationship to photovoltaic performance","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Chao He, Guocai Liu, Huiyan Zhao, Kun Zhao, Xingtao An, Zuju Ma","submitted_at":"2019-06-09T00:03:22Z","abstract_excerpt":"Inorganic ferroelectric perovskite oxides are more stable than hybrid perovskites. However, their solar energy harvest efficiency is not so good. Here, by constructing a series of BiFeO3 based devices (solar cells), we investigated three factors that influence the photovoltaic performance, including spontaneous polarization, terminated ions species in the interface between BiFeO3 and the electrode, and polarized light irradiation. This work was carried out in the framework of density functional theory combined with non-equilibrium Green's function theory under built in electric field or finite"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1906.03545","kind":"arxiv","version":5},"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/1906.03545/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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T00:50:43Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Jf4zRefs3ueqeLNzN/tq9EH6z8WTrg38ke9zfvp43ADOU/9o6ilNDQ0gKD5/UE66NJhA7uLgfVe+B95JeAV2Ag==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-22T12:10:35.149111Z"},"content_sha256":"aa47b894ced2a16743b0d1614bb18155a70982200ee283e9218261f2c2b67fd9","schema_version":"1.0","event_id":"sha256:aa47b894ced2a16743b0d1614bb18155a70982200ee283e9218261f2c2b67fd9"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/OLVHKHYLPPWO3XPTTGBWDETGOD/bundle.json","state_url":"https://pith.science/pith/OLVHKHYLPPWO3XPTTGBWDETGOD/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/OLVHKHYLPPWO3XPTTGBWDETGOD/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":"2026-08-22T12:10:35Z","links":{"resolver":"https://pith.science/pith/OLVHKHYLPPWO3XPTTGBWDETGOD","bundle":"https://pith.science/pith/OLVHKHYLPPWO3XPTTGBWDETGOD/bundle.json","state":"https://pith.science/pith/OLVHKHYLPPWO3XPTTGBWDETGOD/state.json","well_known_bundle":"https://pith.science/.well-known/pith/OLVHKHYLPPWO3XPTTGBWDETGOD/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:OLVHKHYLPPWO3XPTTGBWDETGOD","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":"7736a54e8039efe3a9ab4b1778cebcaa443b979d60f9a387ea04f1cb5964b43a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2019-06-09T00:03:22Z","title_canon_sha256":"4201b3b08a8caa65e5fe830427d9fe8a116f3fcbebf9adeca86f45724a151aa8"},"schema_version":"1.0","source":{"id":"1906.03545","kind":"arxiv","version":5}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1906.03545","created_at":"2026-07-05T00:50:43Z"},{"alias_kind":"arxiv_version","alias_value":"1906.03545v5","created_at":"2026-07-05T00:50:43Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1906.03545","created_at":"2026-07-05T00:50:43Z"},{"alias_kind":"pith_short_12","alias_value":"OLVHKHYLPPWO","created_at":"2026-07-05T00:50:43Z"},{"alias_kind":"pith_short_16","alias_value":"OLVHKHYLPPWO3XPT","created_at":"2026-07-05T00:50:43Z"},{"alias_kind":"pith_short_8","alias_value":"OLVHKHYL","created_at":"2026-07-05T00:50:43Z"}],"graph_snapshots":[{"event_id":"sha256:aa47b894ced2a16743b0d1614bb18155a70982200ee283e9218261f2c2b67fd9","target":"graph","created_at":"2026-07-05T00:50:43Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/1906.03545/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Inorganic ferroelectric perovskite oxides are more stable than hybrid perovskites. However, their solar energy harvest efficiency is not so good. Here, by constructing a series of BiFeO3 based devices (solar cells), we investigated three factors that influence the photovoltaic performance, including spontaneous polarization, terminated ions species in the interface between BiFeO3 and the electrode, and polarized light irradiation. This work was carried out in the framework of density functional theory combined with non-equilibrium Green's function theory under built in electric field or finite","authors_text":"Chao He, Guocai Liu, Huiyan Zhao, Kun Zhao, Xingtao An, Zuju Ma","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2019-06-09T00:03:22Z","title":"Inorganic photovoltaic cells based on BiFeO3: spontaneous polarization, lattice matching, light polarization and their relationship to photovoltaic performance"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1906.03545","kind":"arxiv","version":5},"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:a65d31a167293d9d344ba261bfb09efb33e6312f811dcc2c3fe2c277884fcabd","target":"record","created_at":"2026-07-05T00:50:43Z","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":"7736a54e8039efe3a9ab4b1778cebcaa443b979d60f9a387ea04f1cb5964b43a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2019-06-09T00:03:22Z","title_canon_sha256":"4201b3b08a8caa65e5fe830427d9fe8a116f3fcbebf9adeca86f45724a151aa8"},"schema_version":"1.0","source":{"id":"1906.03545","kind":"arxiv","version":5}},"canonical_sha256":"72ea751f0b7becedddf3998361926670d28b0d25a5d97057ed9e5571bce79218","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"72ea751f0b7becedddf3998361926670d28b0d25a5d97057ed9e5571bce79218","first_computed_at":"2026-07-05T00:50:43.079620Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T00:50:43.079620Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"CPD4dVV/F7djLgmqSW1yB46M53HuEZvY2Kjy9ybW72nZbYs0k7NqVz/YJ5zCXU/ss+IT6VYVmryqVwWep85rCg==","signature_status":"signed_v1","signed_at":"2026-07-05T00:50:43.080125Z","signed_message":"canonical_sha256_bytes"},"source_id":"1906.03545","source_kind":"arxiv","source_version":5}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a65d31a167293d9d344ba261bfb09efb33e6312f811dcc2c3fe2c277884fcabd","sha256:aa47b894ced2a16743b0d1614bb18155a70982200ee283e9218261f2c2b67fd9"],"state_sha256":"e5ed8588db0b580ce02840c11878762bc2d37c92d253d1be709140927ab8246a"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"auRVqcz9fnwQ8hXNhOVWMlRgGUz6H9nnxCUpbOzQHb968nQcpUmX2PghmvpdHocSKUQ7ANQ/hzQKLTDSkvjoCg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-22T12:10:35.153917Z","bundle_sha256":"affe461a6afbbc2471b905123906c68b65b8272e8677906a83900ad8b8672926"}}