{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2025:OIQIQCNADBBRQI2QB6V2H27MI3","short_pith_number":"pith:OIQIQCNA","canonical_record":{"source":{"id":"2504.21557","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2025-04-30T11:54:43Z","cross_cats_sorted":["physics.app-ph"],"title_canon_sha256":"7f01bb33baa4e2217ed2004b1fb818756fb72a55e1cf6ce13f1726c98e7dd3fa","abstract_canon_sha256":"023b4e4265bdf0776aee14549d77df8e8f1ff2b609b1e3528e8582edf7c3942d"},"schema_version":"1.0"},"canonical_sha256":"72208809a018431823500faba3ebec46c710b3bc74a45e366dbc39a7dc81cc70","source":{"kind":"arxiv","id":"2504.21557","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2504.21557","created_at":"2026-07-05T10:56:25Z"},{"alias_kind":"arxiv_version","alias_value":"2504.21557v1","created_at":"2026-07-05T10:56:25Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2504.21557","created_at":"2026-07-05T10:56:25Z"},{"alias_kind":"pith_short_12","alias_value":"OIQIQCNADBBR","created_at":"2026-07-05T10:56:25Z"},{"alias_kind":"pith_short_16","alias_value":"OIQIQCNADBBRQI2Q","created_at":"2026-07-05T10:56:25Z"},{"alias_kind":"pith_short_8","alias_value":"OIQIQCNA","created_at":"2026-07-05T10:56:25Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2025:OIQIQCNADBBRQI2QB6V2H27MI3","target":"record","payload":{"canonical_record":{"source":{"id":"2504.21557","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2025-04-30T11:54:43Z","cross_cats_sorted":["physics.app-ph"],"title_canon_sha256":"7f01bb33baa4e2217ed2004b1fb818756fb72a55e1cf6ce13f1726c98e7dd3fa","abstract_canon_sha256":"023b4e4265bdf0776aee14549d77df8e8f1ff2b609b1e3528e8582edf7c3942d"},"schema_version":"1.0"},"canonical_sha256":"72208809a018431823500faba3ebec46c710b3bc74a45e366dbc39a7dc81cc70","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T10:56:25.845907Z","signature_b64":"CIdBni/DvB0K0q/DNgHsByfMPE1em4cKJXVswmzXOTghlzfWWnG/nf8/ow0UgVtCsDAbfVubPRGdQii/Fk/2Aw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"72208809a018431823500faba3ebec46c710b3bc74a45e366dbc39a7dc81cc70","last_reissued_at":"2026-07-05T10:56:25.845171Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T10:56:25.845171Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2504.21557","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":"2026-07-05T10:56:25Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"kKDS4HQxFNvwm24Vzdp43KDW86Y5g1uiPOIlJEmQcW632//YtHW42H2V29b0EuTmDGVS1/fbH1rSrZVuDSmuAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-19T08:44:43.868675Z"},"content_sha256":"a10a4242a85d71e0dd8ef55415eb2cca5ac352e6edcdf345cb18b4ee96ce6aa1","schema_version":"1.0","event_id":"sha256:a10a4242a85d71e0dd8ef55415eb2cca5ac352e6edcdf345cb18b4ee96ce6aa1"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2025:OIQIQCNADBBRQI2QB6V2H27MI3","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Optimizing carrier balance in CsPbBr3 nanocrystal LEDs: The role of alkyl ligands and polar electron transport layers","license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","headline":"","cross_cats":["physics.app-ph"],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Aladin Ullrich, Arup Sarkar, Denis Andrienko, Fengshuo Zu, Girish K. Hanumantharaju, Marcus Scheele, Norbert Koch, Roshini Jayabalan, Theresa Hettiger, Wolfgang Br\\\"utting","submitted_at":"2025-04-30T11:54:43Z","abstract_excerpt":"The study of lead halide perovskite nanocrystal based light-emitting diodes (LEDs) has advanced significantly, with notable improvements in stability and optical properties. However, optimizing charge carrier injection and transport remains a challenge. Efficient electroluminescence requires a balanced transport of both holes and electrons within the emitting material. Here, we investigate cubic CsPbBr\\textsubscript{3} nanocrystals passivated with oleylamine and oleic acid, comparing them to ligand-exchanged nanocrystals with didodecyldimethylammonium bromide (DDABr). Nuclear magnetic resonanc"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2504.21557","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/2504.21557/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":"2026-07-05T10:56:25Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"9zFKEvJnOkPnnz0RFpw2WRKJ7I8UHNzxSuDBZZfffN9tgxmOsKRt8uE8KgmnPdD1HtU4H67ojRo225HVrikBBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-19T08:44:43.869637Z"},"content_sha256":"bec5e43e02dc1e78693b501c70f9fdd663e276d5f33ec402c292ef8f9b2be5fa","schema_version":"1.0","event_id":"sha256:bec5e43e02dc1e78693b501c70f9fdd663e276d5f33ec402c292ef8f9b2be5fa"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/OIQIQCNADBBRQI2QB6V2H27MI3/bundle.json","state_url":"https://pith.science/pith/OIQIQCNADBBRQI2QB6V2H27MI3/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/OIQIQCNADBBRQI2QB6V2H27MI3/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":"2026-08-19T08:44:43Z","links":{"resolver":"https://pith.science/pith/OIQIQCNADBBRQI2QB6V2H27MI3","bundle":"https://pith.science/pith/OIQIQCNADBBRQI2QB6V2H27MI3/bundle.json","state":"https://pith.science/pith/OIQIQCNADBBRQI2QB6V2H27MI3/state.json","well_known_bundle":"https://pith.science/.well-known/pith/OIQIQCNADBBRQI2QB6V2H27MI3/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:OIQIQCNADBBRQI2QB6V2H27MI3","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":"023b4e4265bdf0776aee14549d77df8e8f1ff2b609b1e3528e8582edf7c3942d","cross_cats_sorted":["physics.app-ph"],"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2025-04-30T11:54:43Z","title_canon_sha256":"7f01bb33baa4e2217ed2004b1fb818756fb72a55e1cf6ce13f1726c98e7dd3fa"},"schema_version":"1.0","source":{"id":"2504.21557","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2504.21557","created_at":"2026-07-05T10:56:25Z"},{"alias_kind":"arxiv_version","alias_value":"2504.21557v1","created_at":"2026-07-05T10:56:25Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2504.21557","created_at":"2026-07-05T10:56:25Z"},{"alias_kind":"pith_short_12","alias_value":"OIQIQCNADBBR","created_at":"2026-07-05T10:56:25Z"},{"alias_kind":"pith_short_16","alias_value":"OIQIQCNADBBRQI2Q","created_at":"2026-07-05T10:56:25Z"},{"alias_kind":"pith_short_8","alias_value":"OIQIQCNA","created_at":"2026-07-05T10:56:25Z"}],"graph_snapshots":[{"event_id":"sha256:bec5e43e02dc1e78693b501c70f9fdd663e276d5f33ec402c292ef8f9b2be5fa","target":"graph","created_at":"2026-07-05T10:56:25Z","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/2504.21557/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The study of lead halide perovskite nanocrystal based light-emitting diodes (LEDs) has advanced significantly, with notable improvements in stability and optical properties. However, optimizing charge carrier injection and transport remains a challenge. Efficient electroluminescence requires a balanced transport of both holes and electrons within the emitting material. Here, we investigate cubic CsPbBr\\textsubscript{3} nanocrystals passivated with oleylamine and oleic acid, comparing them to ligand-exchanged nanocrystals with didodecyldimethylammonium bromide (DDABr). Nuclear magnetic resonanc","authors_text":"Aladin Ullrich, Arup Sarkar, Denis Andrienko, Fengshuo Zu, Girish K. Hanumantharaju, Marcus Scheele, Norbert Koch, Roshini Jayabalan, Theresa Hettiger, Wolfgang Br\\\"utting","cross_cats":["physics.app-ph"],"headline":"","license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2025-04-30T11:54:43Z","title":"Optimizing carrier balance in CsPbBr3 nanocrystal LEDs: The role of alkyl ligands and polar electron transport layers"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2504.21557","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:a10a4242a85d71e0dd8ef55415eb2cca5ac352e6edcdf345cb18b4ee96ce6aa1","target":"record","created_at":"2026-07-05T10:56:25Z","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":"023b4e4265bdf0776aee14549d77df8e8f1ff2b609b1e3528e8582edf7c3942d","cross_cats_sorted":["physics.app-ph"],"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2025-04-30T11:54:43Z","title_canon_sha256":"7f01bb33baa4e2217ed2004b1fb818756fb72a55e1cf6ce13f1726c98e7dd3fa"},"schema_version":"1.0","source":{"id":"2504.21557","kind":"arxiv","version":1}},"canonical_sha256":"72208809a018431823500faba3ebec46c710b3bc74a45e366dbc39a7dc81cc70","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"72208809a018431823500faba3ebec46c710b3bc74a45e366dbc39a7dc81cc70","first_computed_at":"2026-07-05T10:56:25.845171Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T10:56:25.845171Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"CIdBni/DvB0K0q/DNgHsByfMPE1em4cKJXVswmzXOTghlzfWWnG/nf8/ow0UgVtCsDAbfVubPRGdQii/Fk/2Aw==","signature_status":"signed_v1","signed_at":"2026-07-05T10:56:25.845907Z","signed_message":"canonical_sha256_bytes"},"source_id":"2504.21557","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a10a4242a85d71e0dd8ef55415eb2cca5ac352e6edcdf345cb18b4ee96ce6aa1","sha256:bec5e43e02dc1e78693b501c70f9fdd663e276d5f33ec402c292ef8f9b2be5fa"],"state_sha256":"4cd2bece502b52e1629aebe9b6e79c9d5b77bf9d4df06c0996c8bd1f6c944308"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"UR0v5YgWDQpKp1+k/PpvUi18zw3m4ZKvZsXTf2epH/xRq8/iT91ijcLb7Iu1Ll0X872UPXjsFxotvojKkc+JAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-19T08:44:43.876946Z","bundle_sha256":"5cd7e4f14d560670df86fd1f9ba2577e70124afae2a13d32868bfb0e65ecd797"}}