{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2020:72WOBCBBQPIKX2TPVHRTXI7ZHE","short_pith_number":"pith:72WOBCBB","canonical_record":{"source":{"id":"2007.15501","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2020-07-30T14:45:42Z","cross_cats_sorted":["cond-mat.mtrl-sci"],"title_canon_sha256":"8555ef533e7b0682bfeb0b3e178872df9fc8d1ea10d3b7ce19cefe4f655354a7","abstract_canon_sha256":"39ec883e3827a6fb09ac54362adda890b149b75b188f85e2ebc538059cde6dc5"},"schema_version":"1.0"},"canonical_sha256":"feace0882183d0abea6fa9e33ba3f9391edaf9c3a3be77f22a1ee31f6fc1dcaf","source":{"kind":"arxiv","id":"2007.15501","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2007.15501","created_at":"2026-07-05T01:23:31Z"},{"alias_kind":"arxiv_version","alias_value":"2007.15501v1","created_at":"2026-07-05T01:23:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2007.15501","created_at":"2026-07-05T01:23:31Z"},{"alias_kind":"pith_short_12","alias_value":"72WOBCBBQPIK","created_at":"2026-07-05T01:23:31Z"},{"alias_kind":"pith_short_16","alias_value":"72WOBCBBQPIKX2TP","created_at":"2026-07-05T01:23:31Z"},{"alias_kind":"pith_short_8","alias_value":"72WOBCBB","created_at":"2026-07-05T01:23:31Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2020:72WOBCBBQPIKX2TPVHRTXI7ZHE","target":"record","payload":{"canonical_record":{"source":{"id":"2007.15501","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2020-07-30T14:45:42Z","cross_cats_sorted":["cond-mat.mtrl-sci"],"title_canon_sha256":"8555ef533e7b0682bfeb0b3e178872df9fc8d1ea10d3b7ce19cefe4f655354a7","abstract_canon_sha256":"39ec883e3827a6fb09ac54362adda890b149b75b188f85e2ebc538059cde6dc5"},"schema_version":"1.0"},"canonical_sha256":"feace0882183d0abea6fa9e33ba3f9391edaf9c3a3be77f22a1ee31f6fc1dcaf","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T01:23:31.508892Z","signature_b64":"DKMAPXQIB9rQxxzyc9wLhMB8PWQw4XVnQm+b1/3p3PmOr/wAVbEYOlJwx6PxB7hI4JYJxgj9AyAoCabfvhe3AQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"feace0882183d0abea6fa9e33ba3f9391edaf9c3a3be77f22a1ee31f6fc1dcaf","last_reissued_at":"2026-07-05T01:23:31.508406Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T01:23:31.508406Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2007.15501","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":"2026-07-05T01:23:31Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"G8N19lBQ88cea4EDc8yNqTFrqodQYZFHEq2mtf0cjxk8yb75av13AJW/CUxy9GuTEGU2EGS3zJNJIbJRr52yCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-12T14:12:44.055927Z"},"content_sha256":"ee0220d016e6905f2fbc62817e1a5ca3c6643cd1e6e3ce626d0e40793d3e6adf","schema_version":"1.0","event_id":"sha256:ee0220d016e6905f2fbc62817e1a5ca3c6643cd1e6e3ce626d0e40793d3e6adf"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2020:72WOBCBBQPIKX2TPVHRTXI7ZHE","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Sequentially Deposited versus Conventional Nonfullerene Organic Solar Cells: Interfacial Trap States, Vertical Stratification, and Exciton Dissociation","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.mtrl-sci"],"primary_cat":"physics.app-ph","authors_text":"Aditya Sadhanala, Andrew J. Pearson, Artem A. Bakulin, Bin Kan, Bruno Ehrler, Caterina Ducati, Changsoon Cho, Daniel Credgington, Felix U. Kosasih, Giorgio Divitini, Jiangbin Zhang, Moritz H. Futscher, Neil C. Greenham, Qinying Gu, Richard H. Friend, Vincent Lami, Xiangjian Wan, Yana Vaynzof, Yongsheng Chen","submitted_at":"2020-07-30T14:45:42Z","abstract_excerpt":"Bulk-heterojunction (BHJ) non-fullerene organic solar cells prepared from sequentially deposited donor and acceptor layers (sq-BHJ) have recently been promising to be highly efficient, environmentally friendly, and compatible with large area and roll-to-toll fabrication. However, the related photophysics at donor-acceptor interface and the vertical heterogeneity of donor-acceptor distribution, critical for exciton dissociation and device performance, are largely unexplored. Herein, steady-state and time-resolved optical and electrical techniques are employed to characterize the interfacial tra"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2007.15501","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/2007.15501/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":"2026-07-05T01:23:31Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"LdwHEgzw5a+uS4OFC1leLZjH5/WwQHmHwbWosuWGBfQ15Tpc910/UxB0815b4w1tTOlJC7XZ240Ber9buhEbDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-12T14:12:44.056338Z"},"content_sha256":"3cae5cfce4ce4cbf24557764cc0bd17b8e90516f2e1b4dc10db2658f0ba1cada","schema_version":"1.0","event_id":"sha256:3cae5cfce4ce4cbf24557764cc0bd17b8e90516f2e1b4dc10db2658f0ba1cada"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/72WOBCBBQPIKX2TPVHRTXI7ZHE/bundle.json","state_url":"https://pith.science/pith/72WOBCBBQPIKX2TPVHRTXI7ZHE/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/72WOBCBBQPIKX2TPVHRTXI7ZHE/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":"2026-07-12T14:12:44Z","links":{"resolver":"https://pith.science/pith/72WOBCBBQPIKX2TPVHRTXI7ZHE","bundle":"https://pith.science/pith/72WOBCBBQPIKX2TPVHRTXI7ZHE/bundle.json","state":"https://pith.science/pith/72WOBCBBQPIKX2TPVHRTXI7ZHE/state.json","well_known_bundle":"https://pith.science/.well-known/pith/72WOBCBBQPIKX2TPVHRTXI7ZHE/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:72WOBCBBQPIKX2TPVHRTXI7ZHE","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":"39ec883e3827a6fb09ac54362adda890b149b75b188f85e2ebc538059cde6dc5","cross_cats_sorted":["cond-mat.mtrl-sci"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2020-07-30T14:45:42Z","title_canon_sha256":"8555ef533e7b0682bfeb0b3e178872df9fc8d1ea10d3b7ce19cefe4f655354a7"},"schema_version":"1.0","source":{"id":"2007.15501","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2007.15501","created_at":"2026-07-05T01:23:31Z"},{"alias_kind":"arxiv_version","alias_value":"2007.15501v1","created_at":"2026-07-05T01:23:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2007.15501","created_at":"2026-07-05T01:23:31Z"},{"alias_kind":"pith_short_12","alias_value":"72WOBCBBQPIK","created_at":"2026-07-05T01:23:31Z"},{"alias_kind":"pith_short_16","alias_value":"72WOBCBBQPIKX2TP","created_at":"2026-07-05T01:23:31Z"},{"alias_kind":"pith_short_8","alias_value":"72WOBCBB","created_at":"2026-07-05T01:23:31Z"}],"graph_snapshots":[{"event_id":"sha256:3cae5cfce4ce4cbf24557764cc0bd17b8e90516f2e1b4dc10db2658f0ba1cada","target":"graph","created_at":"2026-07-05T01:23:31Z","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/2007.15501/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Bulk-heterojunction (BHJ) non-fullerene organic solar cells prepared from sequentially deposited donor and acceptor layers (sq-BHJ) have recently been promising to be highly efficient, environmentally friendly, and compatible with large area and roll-to-toll fabrication. However, the related photophysics at donor-acceptor interface and the vertical heterogeneity of donor-acceptor distribution, critical for exciton dissociation and device performance, are largely unexplored. Herein, steady-state and time-resolved optical and electrical techniques are employed to characterize the interfacial tra","authors_text":"Aditya Sadhanala, Andrew J. Pearson, Artem A. Bakulin, Bin Kan, Bruno Ehrler, Caterina Ducati, Changsoon Cho, Daniel Credgington, Felix U. Kosasih, Giorgio Divitini, Jiangbin Zhang, Moritz H. Futscher, Neil C. Greenham, Qinying Gu, Richard H. Friend, Vincent Lami, Xiangjian Wan, Yana Vaynzof, Yongsheng Chen","cross_cats":["cond-mat.mtrl-sci"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2020-07-30T14:45:42Z","title":"Sequentially Deposited versus Conventional Nonfullerene Organic Solar Cells: Interfacial Trap States, Vertical Stratification, and Exciton Dissociation"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2007.15501","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:ee0220d016e6905f2fbc62817e1a5ca3c6643cd1e6e3ce626d0e40793d3e6adf","target":"record","created_at":"2026-07-05T01:23:31Z","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":"39ec883e3827a6fb09ac54362adda890b149b75b188f85e2ebc538059cde6dc5","cross_cats_sorted":["cond-mat.mtrl-sci"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2020-07-30T14:45:42Z","title_canon_sha256":"8555ef533e7b0682bfeb0b3e178872df9fc8d1ea10d3b7ce19cefe4f655354a7"},"schema_version":"1.0","source":{"id":"2007.15501","kind":"arxiv","version":1}},"canonical_sha256":"feace0882183d0abea6fa9e33ba3f9391edaf9c3a3be77f22a1ee31f6fc1dcaf","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"feace0882183d0abea6fa9e33ba3f9391edaf9c3a3be77f22a1ee31f6fc1dcaf","first_computed_at":"2026-07-05T01:23:31.508406Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T01:23:31.508406Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"DKMAPXQIB9rQxxzyc9wLhMB8PWQw4XVnQm+b1/3p3PmOr/wAVbEYOlJwx6PxB7hI4JYJxgj9AyAoCabfvhe3AQ==","signature_status":"signed_v1","signed_at":"2026-07-05T01:23:31.508892Z","signed_message":"canonical_sha256_bytes"},"source_id":"2007.15501","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ee0220d016e6905f2fbc62817e1a5ca3c6643cd1e6e3ce626d0e40793d3e6adf","sha256:3cae5cfce4ce4cbf24557764cc0bd17b8e90516f2e1b4dc10db2658f0ba1cada"],"state_sha256":"0bb012d87563f1ba60fe36158db89e8bc960bf3decac766eeb0e39a6466fca01"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"GHRe2q55tnQBBaTT/WNCFA1XWQrJMXwGOBG6Nl8170XX8ykVObeVtr9bmGv3Ir/eGiMiqbrT2DDp8IIlAb9mAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-12T14:12:44.058800Z","bundle_sha256":"86b2f33da0cf531e2a6f509910f81d95c03ad3f825cd5252dbaceee14abda46f"}}