{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:YH6D2TFTSOXOR4KLALUDUHSJ4M","short_pith_number":"pith:YH6D2TFT","canonical_record":{"source":{"id":"1506.01301","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2015-06-03T16:19:18Z","cross_cats_sorted":[],"title_canon_sha256":"345ebbbe85250a98848d22118cf7e2cba9369c4dd50f8a2f653c54e9c5d48ba7","abstract_canon_sha256":"baa4f019c9ffdc5b01e01a5d81e9db231bf066fa2f714ed97ccea89ee2086fc7"},"schema_version":"1.0"},"canonical_sha256":"c1fc3d4cb393aee8f14b02e83a1e49e33e2a6da298a303cef7004a3380c5bbc3","source":{"kind":"arxiv","id":"1506.01301","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1506.01301","created_at":"2026-05-18T00:22:16Z"},{"alias_kind":"arxiv_version","alias_value":"1506.01301v1","created_at":"2026-05-18T00:22:16Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1506.01301","created_at":"2026-05-18T00:22:16Z"},{"alias_kind":"pith_short_12","alias_value":"YH6D2TFTSOXO","created_at":"2026-05-18T12:29:50Z"},{"alias_kind":"pith_short_16","alias_value":"YH6D2TFTSOXOR4KL","created_at":"2026-05-18T12:29:50Z"},{"alias_kind":"pith_short_8","alias_value":"YH6D2TFT","created_at":"2026-05-18T12:29:50Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:YH6D2TFTSOXOR4KLALUDUHSJ4M","target":"record","payload":{"canonical_record":{"source":{"id":"1506.01301","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2015-06-03T16:19:18Z","cross_cats_sorted":[],"title_canon_sha256":"345ebbbe85250a98848d22118cf7e2cba9369c4dd50f8a2f653c54e9c5d48ba7","abstract_canon_sha256":"baa4f019c9ffdc5b01e01a5d81e9db231bf066fa2f714ed97ccea89ee2086fc7"},"schema_version":"1.0"},"canonical_sha256":"c1fc3d4cb393aee8f14b02e83a1e49e33e2a6da298a303cef7004a3380c5bbc3","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:22:16.599813Z","signature_b64":"WWYJgfVRmvjPZj8AhiVMebRMIp8BkQAT9dCHG2v9u1zvb4CpBasRCaIarqrgxnoKfk6gYpL0i50GOBk1DlNLDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"c1fc3d4cb393aee8f14b02e83a1e49e33e2a6da298a303cef7004a3380c5bbc3","last_reissued_at":"2026-05-18T00:22:16.599308Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:22:16.599308Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1506.01301","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":"2026-05-18T00:22:16Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"EWhRxwSSBumHg0pR8oUz0Bv3dzsjosbvcZDJ6m0adbI17gOM8+Zh5wVDJjOx7hHp1uSin+lYwb1L/SMdnQ8SDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-21T21:27:02.912651Z"},"content_sha256":"04b091db9250e704599ecb057ae9067a4f41bae49eec233f5ba56b6c28eadccf","schema_version":"1.0","event_id":"sha256:04b091db9250e704599ecb057ae9067a4f41bae49eec233f5ba56b6c28eadccf"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:YH6D2TFTSOXOR4KLALUDUHSJ4M","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Intrinsic Instability of the Hybrid Halide Perovskite Semiconductor CH3NH3PbI3","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Aron Walsh, Hongjun Xiang, Peng Xu, Shiyou Chen, Su-Huai Wei, Xin-Gao Gong, Yue-Yu Zhang","submitted_at":"2015-06-03T16:19:18Z","abstract_excerpt":"The organic-inorganic hybrid perovskite CH3NH3PbI3 has attracted significant interest for its high performance in converting solar light into electrical power with an efficiency exceeding 20%. Unfortunately, chemical stability is one major challenge in the development of the CH3NH3PbI3 solar cells. It was commonly assumed that moisture or oxygen in the environment causes the poor stability of hybrid halide perovskites, however, here we show from the first-principles calculations that the room-temperature tetragonal phase of CH3NH3PbI3 is thermodynamically unstable with respect to the phase sep"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1506.01301","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":""},"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":"2026-05-18T00:22:16Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"TWVi0uWiSMdQjfj6RSHX1u7/e8w68rQx4paWc8JcTOjLDx25RcZXxRNhcq6zqNTXgdvWouVEipE0/0vPt7zvBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-21T21:27:02.913000Z"},"content_sha256":"b3b867c504127df9c47b24bec3f3b7742a9b6f75f187df4ec903745a86adcfc3","schema_version":"1.0","event_id":"sha256:b3b867c504127df9c47b24bec3f3b7742a9b6f75f187df4ec903745a86adcfc3"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/YH6D2TFTSOXOR4KLALUDUHSJ4M/bundle.json","state_url":"https://pith.science/pith/YH6D2TFTSOXOR4KLALUDUHSJ4M/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/YH6D2TFTSOXOR4KLALUDUHSJ4M/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":"2026-06-21T21:27:02Z","links":{"resolver":"https://pith.science/pith/YH6D2TFTSOXOR4KLALUDUHSJ4M","bundle":"https://pith.science/pith/YH6D2TFTSOXOR4KLALUDUHSJ4M/bundle.json","state":"https://pith.science/pith/YH6D2TFTSOXOR4KLALUDUHSJ4M/state.json","well_known_bundle":"https://pith.science/.well-known/pith/YH6D2TFTSOXOR4KLALUDUHSJ4M/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:YH6D2TFTSOXOR4KLALUDUHSJ4M","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":"baa4f019c9ffdc5b01e01a5d81e9db231bf066fa2f714ed97ccea89ee2086fc7","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2015-06-03T16:19:18Z","title_canon_sha256":"345ebbbe85250a98848d22118cf7e2cba9369c4dd50f8a2f653c54e9c5d48ba7"},"schema_version":"1.0","source":{"id":"1506.01301","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1506.01301","created_at":"2026-05-18T00:22:16Z"},{"alias_kind":"arxiv_version","alias_value":"1506.01301v1","created_at":"2026-05-18T00:22:16Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1506.01301","created_at":"2026-05-18T00:22:16Z"},{"alias_kind":"pith_short_12","alias_value":"YH6D2TFTSOXO","created_at":"2026-05-18T12:29:50Z"},{"alias_kind":"pith_short_16","alias_value":"YH6D2TFTSOXOR4KL","created_at":"2026-05-18T12:29:50Z"},{"alias_kind":"pith_short_8","alias_value":"YH6D2TFT","created_at":"2026-05-18T12:29:50Z"}],"graph_snapshots":[{"event_id":"sha256:b3b867c504127df9c47b24bec3f3b7742a9b6f75f187df4ec903745a86adcfc3","target":"graph","created_at":"2026-05-18T00:22:16Z","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":"The organic-inorganic hybrid perovskite CH3NH3PbI3 has attracted significant interest for its high performance in converting solar light into electrical power with an efficiency exceeding 20%. Unfortunately, chemical stability is one major challenge in the development of the CH3NH3PbI3 solar cells. It was commonly assumed that moisture or oxygen in the environment causes the poor stability of hybrid halide perovskites, however, here we show from the first-principles calculations that the room-temperature tetragonal phase of CH3NH3PbI3 is thermodynamically unstable with respect to the phase sep","authors_text":"Aron Walsh, Hongjun Xiang, Peng Xu, Shiyou Chen, Su-Huai Wei, Xin-Gao Gong, Yue-Yu Zhang","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2015-06-03T16:19:18Z","title":"Intrinsic Instability of the Hybrid Halide Perovskite Semiconductor CH3NH3PbI3"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1506.01301","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":"sha256:04b091db9250e704599ecb057ae9067a4f41bae49eec233f5ba56b6c28eadccf","target":"record","created_at":"2026-05-18T00:22:16Z","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":"baa4f019c9ffdc5b01e01a5d81e9db231bf066fa2f714ed97ccea89ee2086fc7","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2015-06-03T16:19:18Z","title_canon_sha256":"345ebbbe85250a98848d22118cf7e2cba9369c4dd50f8a2f653c54e9c5d48ba7"},"schema_version":"1.0","source":{"id":"1506.01301","kind":"arxiv","version":1}},"canonical_sha256":"c1fc3d4cb393aee8f14b02e83a1e49e33e2a6da298a303cef7004a3380c5bbc3","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"c1fc3d4cb393aee8f14b02e83a1e49e33e2a6da298a303cef7004a3380c5bbc3","first_computed_at":"2026-05-18T00:22:16.599308Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:22:16.599308Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"WWYJgfVRmvjPZj8AhiVMebRMIp8BkQAT9dCHG2v9u1zvb4CpBasRCaIarqrgxnoKfk6gYpL0i50GOBk1DlNLDg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:22:16.599813Z","signed_message":"canonical_sha256_bytes"},"source_id":"1506.01301","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:04b091db9250e704599ecb057ae9067a4f41bae49eec233f5ba56b6c28eadccf","sha256:b3b867c504127df9c47b24bec3f3b7742a9b6f75f187df4ec903745a86adcfc3"],"state_sha256":"79a1d2cf1efc1f14cb13bcef2d8774b75d0662a95c15c453cb6275c758a33fe9"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"SOxRU9qfpTgEs/2+8DCuDnDXCGCYebPYp47GqjX9DomU6Tc/c2mTLvTLYYRpg8NrGCkQwE81X99M4CXbebpeDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-21T21:27:02.914929Z","bundle_sha256":"72c43b3efe3572307d95aebae35a4187a7fa0c7ce5dacdf675ad7aea663d4d6c"}}