{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:BWLQ6X54LFOTI4CN5V5TGWVZGJ","short_pith_number":"pith:BWLQ6X54","canonical_record":{"source":{"id":"1205.6642","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2012-05-30T12:24:19Z","cross_cats_sorted":["cond-mat.other"],"title_canon_sha256":"4c3b4c10d1ed5a0352c4c51eda177268d2d3c8f0782f5dca02378c631886d6fc","abstract_canon_sha256":"1d6e810c79eb260dccbb293a93b1065e1a964515c6fc7d303ee21b5cca2c6fbe"},"schema_version":"1.0"},"canonical_sha256":"0d970f5fbc595d34704ded7b335ab93252fab4de0031c3e8a2d0e715cc6afe80","source":{"kind":"arxiv","id":"1205.6642","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1205.6642","created_at":"2026-05-18T03:47:52Z"},{"alias_kind":"arxiv_version","alias_value":"1205.6642v2","created_at":"2026-05-18T03:47:52Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1205.6642","created_at":"2026-05-18T03:47:52Z"},{"alias_kind":"pith_short_12","alias_value":"BWLQ6X54LFOT","created_at":"2026-05-18T12:27:01Z"},{"alias_kind":"pith_short_16","alias_value":"BWLQ6X54LFOTI4CN","created_at":"2026-05-18T12:27:01Z"},{"alias_kind":"pith_short_8","alias_value":"BWLQ6X54","created_at":"2026-05-18T12:27:01Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:BWLQ6X54LFOTI4CN5V5TGWVZGJ","target":"record","payload":{"canonical_record":{"source":{"id":"1205.6642","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2012-05-30T12:24:19Z","cross_cats_sorted":["cond-mat.other"],"title_canon_sha256":"4c3b4c10d1ed5a0352c4c51eda177268d2d3c8f0782f5dca02378c631886d6fc","abstract_canon_sha256":"1d6e810c79eb260dccbb293a93b1065e1a964515c6fc7d303ee21b5cca2c6fbe"},"schema_version":"1.0"},"canonical_sha256":"0d970f5fbc595d34704ded7b335ab93252fab4de0031c3e8a2d0e715cc6afe80","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:47:52.544277Z","signature_b64":"BVLcBjF+kXxJCgDCvOhSYjcgea22wZxHk80Bds1LhDud6DkGfrLInddkcX/dEtqXfoIQjLf5RukOTt1PIhZMAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"0d970f5fbc595d34704ded7b335ab93252fab4de0031c3e8a2d0e715cc6afe80","last_reissued_at":"2026-05-18T03:47:52.543910Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:47:52.543910Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1205.6642","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T03:47:52Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"sIckSTXFrrBldcE1msnbds6uuMmspO+fukqZsufxwf+fPr/8CAfzloRO5gujdxodv26/ZqpIh6tTqd8UBd/kDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-26T21:35:33.817916Z"},"content_sha256":"74b35a687e4ba0b2a900611522184a2cbc9d62234ebc79c7e411ff6265ff37eb","schema_version":"1.0","event_id":"sha256:74b35a687e4ba0b2a900611522184a2cbc9d62234ebc79c7e411ff6265ff37eb"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:BWLQ6X54LFOTI4CN5V5TGWVZGJ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Diffusion-emission theory of photon enhanced thermionic emission solar energy harvesters","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.other"],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Aapo Varpula, Mika Prunnila","submitted_at":"2012-05-30T12:24:19Z","abstract_excerpt":"Numerical and semi-analytical models are presented for photon-enhanced-thermionic-emission (PETE) devices. The models take diffusion of electrons, inhomogeneous photogeneration, and bulk and surface recombination into account. The efficiencies of PETE devices with silicon cathodes are calculated. Our model predicts significantly different electron affinity and temperature dependence for the device than the earlier model based on a rate-equation description of the cathode. We show that surface recombination can reduce the efficiency below 10% at the cathode temperature of 800 K and the concentr"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1205.6642","kind":"arxiv","version":2},"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":"2026-05-18T03:47:52Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"R5lXLLkIzGij7IaD42ym94P7C4irLG41MY/Qxx+GvIxdncDGUaLckinPzRDKY6BIY8m4KoaX3+dfrECoLE8OCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-26T21:35:33.818253Z"},"content_sha256":"7d22ed6685b4c8bc8673a627d4af595935e6d3f089f6083db36718178a10e491","schema_version":"1.0","event_id":"sha256:7d22ed6685b4c8bc8673a627d4af595935e6d3f089f6083db36718178a10e491"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/BWLQ6X54LFOTI4CN5V5TGWVZGJ/bundle.json","state_url":"https://pith.science/pith/BWLQ6X54LFOTI4CN5V5TGWVZGJ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/BWLQ6X54LFOTI4CN5V5TGWVZGJ/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":"2026-06-26T21:35:33Z","links":{"resolver":"https://pith.science/pith/BWLQ6X54LFOTI4CN5V5TGWVZGJ","bundle":"https://pith.science/pith/BWLQ6X54LFOTI4CN5V5TGWVZGJ/bundle.json","state":"https://pith.science/pith/BWLQ6X54LFOTI4CN5V5TGWVZGJ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/BWLQ6X54LFOTI4CN5V5TGWVZGJ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:BWLQ6X54LFOTI4CN5V5TGWVZGJ","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":"1d6e810c79eb260dccbb293a93b1065e1a964515c6fc7d303ee21b5cca2c6fbe","cross_cats_sorted":["cond-mat.other"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2012-05-30T12:24:19Z","title_canon_sha256":"4c3b4c10d1ed5a0352c4c51eda177268d2d3c8f0782f5dca02378c631886d6fc"},"schema_version":"1.0","source":{"id":"1205.6642","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1205.6642","created_at":"2026-05-18T03:47:52Z"},{"alias_kind":"arxiv_version","alias_value":"1205.6642v2","created_at":"2026-05-18T03:47:52Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1205.6642","created_at":"2026-05-18T03:47:52Z"},{"alias_kind":"pith_short_12","alias_value":"BWLQ6X54LFOT","created_at":"2026-05-18T12:27:01Z"},{"alias_kind":"pith_short_16","alias_value":"BWLQ6X54LFOTI4CN","created_at":"2026-05-18T12:27:01Z"},{"alias_kind":"pith_short_8","alias_value":"BWLQ6X54","created_at":"2026-05-18T12:27:01Z"}],"graph_snapshots":[{"event_id":"sha256:7d22ed6685b4c8bc8673a627d4af595935e6d3f089f6083db36718178a10e491","target":"graph","created_at":"2026-05-18T03:47:52Z","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":"Numerical and semi-analytical models are presented for photon-enhanced-thermionic-emission (PETE) devices. The models take diffusion of electrons, inhomogeneous photogeneration, and bulk and surface recombination into account. The efficiencies of PETE devices with silicon cathodes are calculated. Our model predicts significantly different electron affinity and temperature dependence for the device than the earlier model based on a rate-equation description of the cathode. We show that surface recombination can reduce the efficiency below 10% at the cathode temperature of 800 K and the concentr","authors_text":"Aapo Varpula, Mika Prunnila","cross_cats":["cond-mat.other"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2012-05-30T12:24:19Z","title":"Diffusion-emission theory of photon enhanced thermionic emission solar energy harvesters"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1205.6642","kind":"arxiv","version":2},"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":"sha256:74b35a687e4ba0b2a900611522184a2cbc9d62234ebc79c7e411ff6265ff37eb","target":"record","created_at":"2026-05-18T03:47:52Z","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":"1d6e810c79eb260dccbb293a93b1065e1a964515c6fc7d303ee21b5cca2c6fbe","cross_cats_sorted":["cond-mat.other"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2012-05-30T12:24:19Z","title_canon_sha256":"4c3b4c10d1ed5a0352c4c51eda177268d2d3c8f0782f5dca02378c631886d6fc"},"schema_version":"1.0","source":{"id":"1205.6642","kind":"arxiv","version":2}},"canonical_sha256":"0d970f5fbc595d34704ded7b335ab93252fab4de0031c3e8a2d0e715cc6afe80","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"0d970f5fbc595d34704ded7b335ab93252fab4de0031c3e8a2d0e715cc6afe80","first_computed_at":"2026-05-18T03:47:52.543910Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:47:52.543910Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"BVLcBjF+kXxJCgDCvOhSYjcgea22wZxHk80Bds1LhDud6DkGfrLInddkcX/dEtqXfoIQjLf5RukOTt1PIhZMAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T03:47:52.544277Z","signed_message":"canonical_sha256_bytes"},"source_id":"1205.6642","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:74b35a687e4ba0b2a900611522184a2cbc9d62234ebc79c7e411ff6265ff37eb","sha256:7d22ed6685b4c8bc8673a627d4af595935e6d3f089f6083db36718178a10e491"],"state_sha256":"cf3519c7d6f73563c11e7c635cd2cfe0af75a228bcdcd21b2ec517e58dd594bd"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"BYLiIae3b9PTL+mBz11hR0gnmF6yjCo5IDoN9F6hx69gMM2KfI9UprLYvk9x/KNEBDYEJbd/MBKajW+794KECQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-26T21:35:33.820052Z","bundle_sha256":"3e7b9adb5ef704b9f3840564fea7af9d0c23fb5392a487163b5c32aa99387980"}}