{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:VY6U3L7I3IFGFMUWXAN4JDZABD","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":"aff0659c341c63d220c815a86bf05119291a8ecabada38ca0b0e2ace6880d2a0","cross_cats_sorted":["cond-mat.mtrl-sci"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.chem-ph","submitted_at":"2014-01-12T19:08:05Z","title_canon_sha256":"ac8cafd72873e1fa33f0e85e1d1aa139688fac76981033b6f0470cd14a6be329"},"schema_version":"1.0","source":{"id":"1401.2658","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1401.2658","created_at":"2026-05-18T01:45:26Z"},{"alias_kind":"arxiv_version","alias_value":"1401.2658v1","created_at":"2026-05-18T01:45:26Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1401.2658","created_at":"2026-05-18T01:45:26Z"},{"alias_kind":"pith_short_12","alias_value":"VY6U3L7I3IFG","created_at":"2026-05-18T12:28:54Z"},{"alias_kind":"pith_short_16","alias_value":"VY6U3L7I3IFGFMUW","created_at":"2026-05-18T12:28:54Z"},{"alias_kind":"pith_short_8","alias_value":"VY6U3L7I","created_at":"2026-05-18T12:28:54Z"}],"graph_snapshots":[{"event_id":"sha256:93243211fb043556d20df56c7a73e72aec20cd4f39a5e4e6e83ede7daedb142c","target":"graph","created_at":"2026-05-18T01:45:26Z","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":"CH3NH3PbI3-based solar cells were characterized with electron beam-induced current (EBIC), and compared to CH3NH3PbI3-xClx ones. A spatial map of charge separation efficiency in working cells shows p-i-n structures for both thin film cells. Effective diffusion lengths, LD, (from EBIC profile) show that holes are extracted significantly more efficiently than electrons in CH3NH3PbI3, explaining why CH3NH3PbI3-based cells require mesoporous electron conductors, while CH3NH3PbI3-xClx ones, where LD values are comparable for both charge types, do not.","authors_text":"Alex Henning, David Cahen, Eran Edri, Gary Hodes, Konstantin Gartsman, Saar Kirmayer, Sabyasachi Mukhopadhyay, Yossi Rosenwaks","cross_cats":["cond-mat.mtrl-sci"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.chem-ph","submitted_at":"2014-01-12T19:08:05Z","title":"Why Lead Methylammonium tri-IODIDE perovskite-based solar cells requires a mesoporous electron transporting scaffold (but not necessarily a hole conductor)"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1401.2658","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":"sha256:0912ce1a438e833d0976f26416d454816a01666b61307e6ffad3ba5d960848f5","target":"record","created_at":"2026-05-18T01:45:26Z","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":"aff0659c341c63d220c815a86bf05119291a8ecabada38ca0b0e2ace6880d2a0","cross_cats_sorted":["cond-mat.mtrl-sci"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.chem-ph","submitted_at":"2014-01-12T19:08:05Z","title_canon_sha256":"ac8cafd72873e1fa33f0e85e1d1aa139688fac76981033b6f0470cd14a6be329"},"schema_version":"1.0","source":{"id":"1401.2658","kind":"arxiv","version":1}},"canonical_sha256":"ae3d4dafe8da0a62b296b81bc48f2008ee94637556dc64b8648a2b5a87121cee","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"ae3d4dafe8da0a62b296b81bc48f2008ee94637556dc64b8648a2b5a87121cee","first_computed_at":"2026-05-18T01:45:26.381125Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:45:26.381125Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"oE2sUHthj8TXl7wYF2e+elYDsd49bcvvqwNo3VqGptxV7qUpnt/qtZ+oy8Fa9SnXcOuQAAdabyx6tIBUoM3eBw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:45:26.381753Z","signed_message":"canonical_sha256_bytes"},"source_id":"1401.2658","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:0912ce1a438e833d0976f26416d454816a01666b61307e6ffad3ba5d960848f5","sha256:93243211fb043556d20df56c7a73e72aec20cd4f39a5e4e6e83ede7daedb142c"],"state_sha256":"a639c05d0e6554b012428424fcef803e4a7b0b395a89cf598c06bbac31b4e0f6"}