{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2023:FVXICLC3R2L3IATDC3DYMETQA4","short_pith_number":"pith:FVXICLC3","canonical_record":{"source":{"id":"2304.09408","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"physics.chem-ph","submitted_at":"2023-04-19T03:50:34Z","cross_cats_sorted":[],"title_canon_sha256":"0843906b2b270835c45e7fe01013d14bf51910c3c2b1a7e8f9f243b693a5d128","abstract_canon_sha256":"a73f0f719d35aff46479e7da7eb6a665cba751f0b8a3ac256837fc875a9343e0"},"schema_version":"1.0"},"canonical_sha256":"2d6e812c5b8e97b4026316c7861270071ef0534176b6baba6fd7ce92c32811e5","source":{"kind":"arxiv","id":"2304.09408","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2304.09408","created_at":"2026-07-05T06:02:38Z"},{"alias_kind":"arxiv_version","alias_value":"2304.09408v1","created_at":"2026-07-05T06:02:38Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2304.09408","created_at":"2026-07-05T06:02:38Z"},{"alias_kind":"pith_short_12","alias_value":"FVXICLC3R2L3","created_at":"2026-07-05T06:02:38Z"},{"alias_kind":"pith_short_16","alias_value":"FVXICLC3R2L3IATD","created_at":"2026-07-05T06:02:38Z"},{"alias_kind":"pith_short_8","alias_value":"FVXICLC3","created_at":"2026-07-05T06:02:38Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2023:FVXICLC3R2L3IATDC3DYMETQA4","target":"record","payload":{"canonical_record":{"source":{"id":"2304.09408","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"physics.chem-ph","submitted_at":"2023-04-19T03:50:34Z","cross_cats_sorted":[],"title_canon_sha256":"0843906b2b270835c45e7fe01013d14bf51910c3c2b1a7e8f9f243b693a5d128","abstract_canon_sha256":"a73f0f719d35aff46479e7da7eb6a665cba751f0b8a3ac256837fc875a9343e0"},"schema_version":"1.0"},"canonical_sha256":"2d6e812c5b8e97b4026316c7861270071ef0534176b6baba6fd7ce92c32811e5","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T06:02:38.120008Z","signature_b64":"Iiij8b9q1CvcwScdeq9WC1mxISk5l3PylCWpsxyP9UiD+8DBMgiZ+BWAleoqW+rrL+drmjGzjN1edtK/wusYCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"2d6e812c5b8e97b4026316c7861270071ef0534176b6baba6fd7ce92c32811e5","last_reissued_at":"2026-07-05T06:02:38.119577Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T06:02:38.119577Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2304.09408","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":"2026-07-05T06:02:38Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"+xyoWfw9Ubm0kKVFV2FVHdAULbqXbsXMKHQLNdOppWZZVOSJJMTUgsE1iSjEe0r6woYbUpuoHLHUbjUGINXyAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-06T11:28:29.112293Z"},"content_sha256":"f2484212f79bd9aee58433f7a001b89398918e06a178e81294ccc99cf16f7700","schema_version":"1.0","event_id":"sha256:f2484212f79bd9aee58433f7a001b89398918e06a178e81294ccc99cf16f7700"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2023:FVXICLC3R2L3IATDC3DYMETQA4","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Intermolecular CT excitons enable nanosecond excited-state lifetimes in NIR-absorbing non-fullerene acceptors for efficient organic solar cells","license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","headline":"","cross_cats":[],"primary_cat":"physics.chem-ph","authors_text":"Christopher C.S. Chan, Guichuan Zhang, He Yan, Hin-Lap Yip, Jean-Luc Bredas, Kam Sing Wong, Philip C.Y. Chow, Sai Wing Tsang, Sudhi Mahadevan, Xian-Kai Chen, Yu Guo","submitted_at":"2023-04-19T03:50:34Z","abstract_excerpt":"State-of-the-art Y6-type molecular acceptors exhibit nanosecond excited-state lifetimes despite their low optical gaps (~1.4 eV), thus allowing organic solar cells (OSCs) to achieve highly efficient charge generation with extended near-infrared (NIR) absorption range (up to ~1000 nm). However, the precise molecular-level mechanism that enables low-energy excited states in Y6-type acceptors to achieve nanosecond lifetimes has remained elusive. Here, we demonstrate that the distinct packing of Y6 molecules in film leads to a strong intermolecular charge-transfer (iCT) character of the lowest exc"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2304.09408","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2304.09408/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":"2026-07-05T06:02:38Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"pSuJ7G0x+qdZlmZ4oHkV/4sPJJEIWgzX4sSmbiei+lYOwxDwKJZjO5cgiLV4grhDc+XkB/JoRsjViCsTKQ3JBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-06T11:28:29.112786Z"},"content_sha256":"f65e15d9bb27ee5693f662fa84113f7c9a438972c0f2cb643d62ce1f51ad298f","schema_version":"1.0","event_id":"sha256:f65e15d9bb27ee5693f662fa84113f7c9a438972c0f2cb643d62ce1f51ad298f"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/FVXICLC3R2L3IATDC3DYMETQA4/bundle.json","state_url":"https://pith.science/pith/FVXICLC3R2L3IATDC3DYMETQA4/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/FVXICLC3R2L3IATDC3DYMETQA4/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":"2026-08-06T11:28:29Z","links":{"resolver":"https://pith.science/pith/FVXICLC3R2L3IATDC3DYMETQA4","bundle":"https://pith.science/pith/FVXICLC3R2L3IATDC3DYMETQA4/bundle.json","state":"https://pith.science/pith/FVXICLC3R2L3IATDC3DYMETQA4/state.json","well_known_bundle":"https://pith.science/.well-known/pith/FVXICLC3R2L3IATDC3DYMETQA4/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2023:FVXICLC3R2L3IATDC3DYMETQA4","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":"a73f0f719d35aff46479e7da7eb6a665cba751f0b8a3ac256837fc875a9343e0","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"physics.chem-ph","submitted_at":"2023-04-19T03:50:34Z","title_canon_sha256":"0843906b2b270835c45e7fe01013d14bf51910c3c2b1a7e8f9f243b693a5d128"},"schema_version":"1.0","source":{"id":"2304.09408","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2304.09408","created_at":"2026-07-05T06:02:38Z"},{"alias_kind":"arxiv_version","alias_value":"2304.09408v1","created_at":"2026-07-05T06:02:38Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2304.09408","created_at":"2026-07-05T06:02:38Z"},{"alias_kind":"pith_short_12","alias_value":"FVXICLC3R2L3","created_at":"2026-07-05T06:02:38Z"},{"alias_kind":"pith_short_16","alias_value":"FVXICLC3R2L3IATD","created_at":"2026-07-05T06:02:38Z"},{"alias_kind":"pith_short_8","alias_value":"FVXICLC3","created_at":"2026-07-05T06:02:38Z"}],"graph_snapshots":[{"event_id":"sha256:f65e15d9bb27ee5693f662fa84113f7c9a438972c0f2cb643d62ce1f51ad298f","target":"graph","created_at":"2026-07-05T06:02:38Z","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/2304.09408/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"State-of-the-art Y6-type molecular acceptors exhibit nanosecond excited-state lifetimes despite their low optical gaps (~1.4 eV), thus allowing organic solar cells (OSCs) to achieve highly efficient charge generation with extended near-infrared (NIR) absorption range (up to ~1000 nm). However, the precise molecular-level mechanism that enables low-energy excited states in Y6-type acceptors to achieve nanosecond lifetimes has remained elusive. Here, we demonstrate that the distinct packing of Y6 molecules in film leads to a strong intermolecular charge-transfer (iCT) character of the lowest exc","authors_text":"Christopher C.S. Chan, Guichuan Zhang, He Yan, Hin-Lap Yip, Jean-Luc Bredas, Kam Sing Wong, Philip C.Y. Chow, Sai Wing Tsang, Sudhi Mahadevan, Xian-Kai Chen, Yu Guo","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"physics.chem-ph","submitted_at":"2023-04-19T03:50:34Z","title":"Intermolecular CT excitons enable nanosecond excited-state lifetimes in NIR-absorbing non-fullerene acceptors for efficient organic solar cells"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2304.09408","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:f2484212f79bd9aee58433f7a001b89398918e06a178e81294ccc99cf16f7700","target":"record","created_at":"2026-07-05T06:02:38Z","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":"a73f0f719d35aff46479e7da7eb6a665cba751f0b8a3ac256837fc875a9343e0","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"physics.chem-ph","submitted_at":"2023-04-19T03:50:34Z","title_canon_sha256":"0843906b2b270835c45e7fe01013d14bf51910c3c2b1a7e8f9f243b693a5d128"},"schema_version":"1.0","source":{"id":"2304.09408","kind":"arxiv","version":1}},"canonical_sha256":"2d6e812c5b8e97b4026316c7861270071ef0534176b6baba6fd7ce92c32811e5","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"2d6e812c5b8e97b4026316c7861270071ef0534176b6baba6fd7ce92c32811e5","first_computed_at":"2026-07-05T06:02:38.119577Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T06:02:38.119577Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Iiij8b9q1CvcwScdeq9WC1mxISk5l3PylCWpsxyP9UiD+8DBMgiZ+BWAleoqW+rrL+drmjGzjN1edtK/wusYCw==","signature_status":"signed_v1","signed_at":"2026-07-05T06:02:38.120008Z","signed_message":"canonical_sha256_bytes"},"source_id":"2304.09408","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:f2484212f79bd9aee58433f7a001b89398918e06a178e81294ccc99cf16f7700","sha256:f65e15d9bb27ee5693f662fa84113f7c9a438972c0f2cb643d62ce1f51ad298f"],"state_sha256":"ab7fcdb517a1adbb74d0819c4b35dcf43cec5e30186a12a031fe77e51b57bc0b"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"vurbqlawRXdbRc0CvfnTVBuF2gkgD8TNjGo8AcwLEoT4vrS6s4Qspn9dvlhAqWYuD6XT98XtkW55i2y/DKsQAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-06T11:28:29.117493Z","bundle_sha256":"5c478dedae06a68e53596eb104a4df9adaea8d9ca25d9b38c18fe48062d3091e"}}