{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2014:4X3WBGAUC4KAP44JPK6AW7YWNU","short_pith_number":"pith:4X3WBGAU","schema_version":"1.0","canonical_sha256":"e5f7609814171407f3897abc0b7f166d262574c88142b09bd59404dcc01c3b4c","source":{"kind":"arxiv","id":"1411.1110","version":1},"attestation_state":"computed","paper":{"title":"Relaxation Between Bright Optical Wannier Excitons in Perovskite Solar Absorber CH$_3$NH$_3$PbI$_3$","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"John Parkhill, Ravindra Nanguneri","submitted_at":"2014-11-04T23:33:39Z","abstract_excerpt":"We study the light-absorbing states of the mixed-halide perovskite CH$_{3}$NH$_{3}$PbI$_2$Cl and tri-iodide perovskite CH$_{3}$NH$_{3}$PbI$_3$ with density functional and many-body calculations to explain the desirable photovolatic features of these materials. The short-lived electron-hole bound states produced in this photovoltaic material are of halide to lead electron transfer character, with a Wannier-type exciton. Bethe-Salpeter (GW+BSE) calculations of the absorption cross section reveal strong screening of the electron-hole interaction. The atomic character of the exciton retains ligand"},"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":"1411.1110","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2014-11-04T23:33:39Z","cross_cats_sorted":[],"title_canon_sha256":"462c461c2259045fb4bbc8b33f6e96555bd64230085f397ea8ca91d83e80a9d5","abstract_canon_sha256":"54f7818d8449b3d69deb0c42e876b35465cd3cf5a643aae274b10a4c6f604fd5"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:38:36.307781Z","signature_b64":"ntMdua+VlVNouXtx7r7wrUjqHTjLJSSvqqqVljYe3/NNVFIT7SXmGuznHLz/nMjJMw1hF+KFBoWmBmNdkkxDDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e5f7609814171407f3897abc0b7f166d262574c88142b09bd59404dcc01c3b4c","last_reissued_at":"2026-05-18T02:38:36.307243Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:38:36.307243Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Relaxation Between Bright Optical Wannier Excitons in Perovskite Solar Absorber CH$_3$NH$_3$PbI$_3$","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"John Parkhill, Ravindra Nanguneri","submitted_at":"2014-11-04T23:33:39Z","abstract_excerpt":"We study the light-absorbing states of the mixed-halide perovskite CH$_{3}$NH$_{3}$PbI$_2$Cl and tri-iodide perovskite CH$_{3}$NH$_{3}$PbI$_3$ with density functional and many-body calculations to explain the desirable photovolatic features of these materials. The short-lived electron-hole bound states produced in this photovoltaic material are of halide to lead electron transfer character, with a Wannier-type exciton. Bethe-Salpeter (GW+BSE) calculations of the absorption cross section reveal strong screening of the electron-hole interaction. The atomic character of the exciton retains ligand"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1411.1110","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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1411.1110","created_at":"2026-05-18T02:38:36.307340+00:00"},{"alias_kind":"arxiv_version","alias_value":"1411.1110v1","created_at":"2026-05-18T02:38:36.307340+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1411.1110","created_at":"2026-05-18T02:38:36.307340+00:00"},{"alias_kind":"pith_short_12","alias_value":"4X3WBGAUC4KA","created_at":"2026-05-18T12:28:14.216126+00:00"},{"alias_kind":"pith_short_16","alias_value":"4X3WBGAUC4KAP44J","created_at":"2026-05-18T12:28:14.216126+00:00"},{"alias_kind":"pith_short_8","alias_value":"4X3WBGAU","created_at":"2026-05-18T12:28:14.216126+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/4X3WBGAUC4KAP44JPK6AW7YWNU","json":"https://pith.science/pith/4X3WBGAUC4KAP44JPK6AW7YWNU.json","graph_json":"https://pith.science/api/pith-number/4X3WBGAUC4KAP44JPK6AW7YWNU/graph.json","events_json":"https://pith.science/api/pith-number/4X3WBGAUC4KAP44JPK6AW7YWNU/events.json","paper":"https://pith.science/paper/4X3WBGAU"},"agent_actions":{"view_html":"https://pith.science/pith/4X3WBGAUC4KAP44JPK6AW7YWNU","download_json":"https://pith.science/pith/4X3WBGAUC4KAP44JPK6AW7YWNU.json","view_paper":"https://pith.science/paper/4X3WBGAU","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1411.1110&json=true","fetch_graph":"https://pith.science/api/pith-number/4X3WBGAUC4KAP44JPK6AW7YWNU/graph.json","fetch_events":"https://pith.science/api/pith-number/4X3WBGAUC4KAP44JPK6AW7YWNU/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/4X3WBGAUC4KAP44JPK6AW7YWNU/action/timestamp_anchor","attest_storage":"https://pith.science/pith/4X3WBGAUC4KAP44JPK6AW7YWNU/action/storage_attestation","attest_author":"https://pith.science/pith/4X3WBGAUC4KAP44JPK6AW7YWNU/action/author_attestation","sign_citation":"https://pith.science/pith/4X3WBGAUC4KAP44JPK6AW7YWNU/action/citation_signature","submit_replication":"https://pith.science/pith/4X3WBGAUC4KAP44JPK6AW7YWNU/action/replication_record"}},"created_at":"2026-05-18T02:38:36.307340+00:00","updated_at":"2026-05-18T02:38:36.307340+00:00"}