{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2025:VJ7KIMVXCJGUEZQCE67IHFH5T7","short_pith_number":"pith:VJ7KIMVX","canonical_record":{"source":{"id":"2508.13286","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2025-08-18T18:03:45Z","cross_cats_sorted":["physics.optics"],"title_canon_sha256":"85fe4439703b0a79f472a638fdb5f0529bee6547b9f756562d37e4b18955ae3c","abstract_canon_sha256":"dc18cf00b2ad98e50e46fe1865daa04159358f2001647749fc28f625f9910733"},"schema_version":"1.0"},"canonical_sha256":"aa7ea432b7124d42660227be8394fd9fecb124071530f91e96ea81416e030c41","source":{"kind":"arxiv","id":"2508.13286","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2508.13286","created_at":"2026-07-05T11:55:45Z"},{"alias_kind":"arxiv_version","alias_value":"2508.13286v1","created_at":"2026-07-05T11:55:45Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2508.13286","created_at":"2026-07-05T11:55:45Z"},{"alias_kind":"pith_short_12","alias_value":"VJ7KIMVXCJGU","created_at":"2026-07-05T11:55:45Z"},{"alias_kind":"pith_short_16","alias_value":"VJ7KIMVXCJGUEZQC","created_at":"2026-07-05T11:55:45Z"},{"alias_kind":"pith_short_8","alias_value":"VJ7KIMVX","created_at":"2026-07-05T11:55:45Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2025:VJ7KIMVXCJGUEZQCE67IHFH5T7","target":"record","payload":{"canonical_record":{"source":{"id":"2508.13286","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2025-08-18T18:03:45Z","cross_cats_sorted":["physics.optics"],"title_canon_sha256":"85fe4439703b0a79f472a638fdb5f0529bee6547b9f756562d37e4b18955ae3c","abstract_canon_sha256":"dc18cf00b2ad98e50e46fe1865daa04159358f2001647749fc28f625f9910733"},"schema_version":"1.0"},"canonical_sha256":"aa7ea432b7124d42660227be8394fd9fecb124071530f91e96ea81416e030c41","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T11:55:45.808588Z","signature_b64":"kmJup2YqMZTr1VDixKGKaha60odHnmKHr4+pwWAWQhucI0CuBF+oLc5bh1S5Eb9kIjWKQq6lYhwGq8mK8WMoBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"aa7ea432b7124d42660227be8394fd9fecb124071530f91e96ea81416e030c41","last_reissued_at":"2026-07-05T11:55:45.808109Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T11:55:45.808109Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2508.13286","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":"2026-07-05T11:55:45Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"c+UwH0dgJnqFMPP8k7e8gJFinGXUXTFCOP8XpShcIZQACX341rKTnnHoPKluNCUj+W0u9VJgT0Klv1FYymXWBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-16T09:14:03.365779Z"},"content_sha256":"58fc3b2c98276ac14d71ea9e102eefc7063e0089e4115aa263befaa1b190137b","schema_version":"1.0","event_id":"sha256:58fc3b2c98276ac14d71ea9e102eefc7063e0089e4115aa263befaa1b190137b"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2025:VJ7KIMVXCJGUEZQCE67IHFH5T7","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Numerical Simulation of Lead-Free Absorbers in 2D Dion-Jacobson Phase Perovskite Solar Cells Using SCAPS-1D: Towards 41% Efficiency","license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","headline":"","cross_cats":["physics.optics"],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Fahim Tanvir, Md. Meraz Hasan, Mostafizur Rahaman, Pallab Chakraborty, Subah Tahsin","submitted_at":"2025-08-18T18:03:45Z","abstract_excerpt":"With the rapid advancement of photovoltaic science, there has been an increasing focus on the development of environment-friendly and structurally advanced perovskite solar cells (PSCs). In this context, this study investigates an architectural configuration employing 2D Dion-Jacobson phase perovskites as both electron and hole transport layers within a 2D/absorber/2D structure. The primary objective is to identify optimal absorber materials and enhance the overall efficiency of the device. While the reduction of lead content remains a significant challenge in PSC development, the present work"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2508.13286","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/2508.13286/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":"2026-07-05T11:55:45Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"apQ6dKYyAC8NPD5pzY4n+CihCyU5MldmoTw+ah8qOjf5sTVeZ9wx9De+XsXZrt1RPD/hLpZZfS7ZDc4PM8WYDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-16T09:14:03.368218Z"},"content_sha256":"6eb058d2782262cfb51a063d233264e41a738840a288d15e4d8e5430f0a52f65","schema_version":"1.0","event_id":"sha256:6eb058d2782262cfb51a063d233264e41a738840a288d15e4d8e5430f0a52f65"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/VJ7KIMVXCJGUEZQCE67IHFH5T7/bundle.json","state_url":"https://pith.science/pith/VJ7KIMVXCJGUEZQCE67IHFH5T7/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/VJ7KIMVXCJGUEZQCE67IHFH5T7/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":"2026-08-16T09:14:03Z","links":{"resolver":"https://pith.science/pith/VJ7KIMVXCJGUEZQCE67IHFH5T7","bundle":"https://pith.science/pith/VJ7KIMVXCJGUEZQCE67IHFH5T7/bundle.json","state":"https://pith.science/pith/VJ7KIMVXCJGUEZQCE67IHFH5T7/state.json","well_known_bundle":"https://pith.science/.well-known/pith/VJ7KIMVXCJGUEZQCE67IHFH5T7/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:VJ7KIMVXCJGUEZQCE67IHFH5T7","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":"dc18cf00b2ad98e50e46fe1865daa04159358f2001647749fc28f625f9910733","cross_cats_sorted":["physics.optics"],"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2025-08-18T18:03:45Z","title_canon_sha256":"85fe4439703b0a79f472a638fdb5f0529bee6547b9f756562d37e4b18955ae3c"},"schema_version":"1.0","source":{"id":"2508.13286","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2508.13286","created_at":"2026-07-05T11:55:45Z"},{"alias_kind":"arxiv_version","alias_value":"2508.13286v1","created_at":"2026-07-05T11:55:45Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2508.13286","created_at":"2026-07-05T11:55:45Z"},{"alias_kind":"pith_short_12","alias_value":"VJ7KIMVXCJGU","created_at":"2026-07-05T11:55:45Z"},{"alias_kind":"pith_short_16","alias_value":"VJ7KIMVXCJGUEZQC","created_at":"2026-07-05T11:55:45Z"},{"alias_kind":"pith_short_8","alias_value":"VJ7KIMVX","created_at":"2026-07-05T11:55:45Z"}],"graph_snapshots":[{"event_id":"sha256:6eb058d2782262cfb51a063d233264e41a738840a288d15e4d8e5430f0a52f65","target":"graph","created_at":"2026-07-05T11:55:45Z","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/2508.13286/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"With the rapid advancement of photovoltaic science, there has been an increasing focus on the development of environment-friendly and structurally advanced perovskite solar cells (PSCs). In this context, this study investigates an architectural configuration employing 2D Dion-Jacobson phase perovskites as both electron and hole transport layers within a 2D/absorber/2D structure. The primary objective is to identify optimal absorber materials and enhance the overall efficiency of the device. While the reduction of lead content remains a significant challenge in PSC development, the present work","authors_text":"Fahim Tanvir, Md. Meraz Hasan, Mostafizur Rahaman, Pallab Chakraborty, Subah Tahsin","cross_cats":["physics.optics"],"headline":"","license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2025-08-18T18:03:45Z","title":"Numerical Simulation of Lead-Free Absorbers in 2D Dion-Jacobson Phase Perovskite Solar Cells Using SCAPS-1D: Towards 41% Efficiency"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2508.13286","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":"sha256:58fc3b2c98276ac14d71ea9e102eefc7063e0089e4115aa263befaa1b190137b","target":"record","created_at":"2026-07-05T11:55:45Z","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":"dc18cf00b2ad98e50e46fe1865daa04159358f2001647749fc28f625f9910733","cross_cats_sorted":["physics.optics"],"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2025-08-18T18:03:45Z","title_canon_sha256":"85fe4439703b0a79f472a638fdb5f0529bee6547b9f756562d37e4b18955ae3c"},"schema_version":"1.0","source":{"id":"2508.13286","kind":"arxiv","version":1}},"canonical_sha256":"aa7ea432b7124d42660227be8394fd9fecb124071530f91e96ea81416e030c41","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"aa7ea432b7124d42660227be8394fd9fecb124071530f91e96ea81416e030c41","first_computed_at":"2026-07-05T11:55:45.808109Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T11:55:45.808109Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"kmJup2YqMZTr1VDixKGKaha60odHnmKHr4+pwWAWQhucI0CuBF+oLc5bh1S5Eb9kIjWKQq6lYhwGq8mK8WMoBw==","signature_status":"signed_v1","signed_at":"2026-07-05T11:55:45.808588Z","signed_message":"canonical_sha256_bytes"},"source_id":"2508.13286","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:58fc3b2c98276ac14d71ea9e102eefc7063e0089e4115aa263befaa1b190137b","sha256:6eb058d2782262cfb51a063d233264e41a738840a288d15e4d8e5430f0a52f65"],"state_sha256":"cf841b155c758584d0f2a4b84a2b45361c8d225dbd684c00fbf4c8a7734716ff"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"G6+dDQ8zBX5FDerbnPBKL6FFrPUHYcO9qWgtInIcNS5zrhELHcx6G5c1MlWj7YW5vkC9Pg7YNoakEewhXDvICQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-16T09:14:03.379866Z","bundle_sha256":"eccc82fd20aa27233378d4f9344c9c460bdc0cdc05dcf3837a84e2f62bc8611f"}}