{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2020:B4ZCA76DV6PT6F4WENKIZOCNZD","short_pith_number":"pith:B4ZCA76D","canonical_record":{"source":{"id":"2007.11574","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2020-07-22T17:55:34Z","cross_cats_sorted":[],"title_canon_sha256":"627699a8b76c5dc7a1c327e9ee1a5a2ba1047a92497cee3b178063733dadc9fe","abstract_canon_sha256":"c8eaa2c3b85fc3c0b545c247bc4c703f50f0564e0a5307a0a0436dd2e51e5e8e"},"schema_version":"1.0"},"canonical_sha256":"0f32207fc3af9f3f179623548cb84dc8eeef6d5d0f7c73868846f52744cbb67c","source":{"kind":"arxiv","id":"2007.11574","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2007.11574","created_at":"2026-07-05T02:06:31Z"},{"alias_kind":"arxiv_version","alias_value":"2007.11574v2","created_at":"2026-07-05T02:06:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2007.11574","created_at":"2026-07-05T02:06:31Z"},{"alias_kind":"pith_short_12","alias_value":"B4ZCA76DV6PT","created_at":"2026-07-05T02:06:31Z"},{"alias_kind":"pith_short_16","alias_value":"B4ZCA76DV6PT6F4W","created_at":"2026-07-05T02:06:31Z"},{"alias_kind":"pith_short_8","alias_value":"B4ZCA76D","created_at":"2026-07-05T02:06:31Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2020:B4ZCA76DV6PT6F4WENKIZOCNZD","target":"record","payload":{"canonical_record":{"source":{"id":"2007.11574","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2020-07-22T17:55:34Z","cross_cats_sorted":[],"title_canon_sha256":"627699a8b76c5dc7a1c327e9ee1a5a2ba1047a92497cee3b178063733dadc9fe","abstract_canon_sha256":"c8eaa2c3b85fc3c0b545c247bc4c703f50f0564e0a5307a0a0436dd2e51e5e8e"},"schema_version":"1.0"},"canonical_sha256":"0f32207fc3af9f3f179623548cb84dc8eeef6d5d0f7c73868846f52744cbb67c","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T02:06:31.974040Z","signature_b64":"+yhUfzJ7Paxpk/6L68knVpwHz/A0HsNLd0bAYTbMSISqiu1qM2/o8qTFujGdwJrWZ0xFmYhYn6fIvyepyoThCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"0f32207fc3af9f3f179623548cb84dc8eeef6d5d0f7c73868846f52744cbb67c","last_reissued_at":"2026-07-05T02:06:31.973602Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T02:06:31.973602Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2007.11574","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":"2026-07-05T02:06:31Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"hjR6L+KXL/nWWc0dlZusDdPQT/siCzDvyUDXHN9zPWS+Bafxi5EMapwOkahbwuQ/efsQDfiMG3cWWERM21KqBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-04T05:18:29.593036Z"},"content_sha256":"b775105b03d87636e4f16bca69dfbea741204c639ce14a4470942313742bc1ca","schema_version":"1.0","event_id":"sha256:b775105b03d87636e4f16bca69dfbea741204c639ce14a4470942313742bc1ca"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2020:B4ZCA76DV6PT6F4WENKIZOCNZD","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Solar Thermoradiative-Photovoltaic Energy Conversion","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.app-ph","authors_text":"Andrew J. Ferguson, Eric J. Tervo, Eric S. Toberer, Myles A. Steiner, William A. Callahan","submitted_at":"2020-07-22T17:55:34Z","abstract_excerpt":"We propose a solar thermal energy conversion system consisting of a solar absorber, a thermoradiative cell or negative illumination photodiode, and a photovoltaic cell. Because it is a heat engine, this system can also be paired with thermal storage to provide reliable electricity generation. Heat from the solar absorber drives radiative recombination current in the thermoradiative cell, and its emitted light is absorbed by the photovoltaic cell to provide an additional photocurrent. Based on the principle of detailed balance, we calculate a limiting solar conversion efficiency of 85% for full"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2007.11574","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2007.11574/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":"2026-07-05T02:06:31Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"cTZQn5M8IzWkq373PXnOmHoeJ4oy4Hz25/FBXD9NPxD1Dfbr1/DGvOWI5B2kj4TArxFs2ervRvEWPpdkZ+9TBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-04T05:18:29.593513Z"},"content_sha256":"91324948513f0ae8bb30978e9f25cd60a93b57ad6eecb9c91c9f5511810792e5","schema_version":"1.0","event_id":"sha256:91324948513f0ae8bb30978e9f25cd60a93b57ad6eecb9c91c9f5511810792e5"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/B4ZCA76DV6PT6F4WENKIZOCNZD/bundle.json","state_url":"https://pith.science/pith/B4ZCA76DV6PT6F4WENKIZOCNZD/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/B4ZCA76DV6PT6F4WENKIZOCNZD/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":"2026-08-04T05:18:29Z","links":{"resolver":"https://pith.science/pith/B4ZCA76DV6PT6F4WENKIZOCNZD","bundle":"https://pith.science/pith/B4ZCA76DV6PT6F4WENKIZOCNZD/bundle.json","state":"https://pith.science/pith/B4ZCA76DV6PT6F4WENKIZOCNZD/state.json","well_known_bundle":"https://pith.science/.well-known/pith/B4ZCA76DV6PT6F4WENKIZOCNZD/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:B4ZCA76DV6PT6F4WENKIZOCNZD","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":"c8eaa2c3b85fc3c0b545c247bc4c703f50f0564e0a5307a0a0436dd2e51e5e8e","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2020-07-22T17:55:34Z","title_canon_sha256":"627699a8b76c5dc7a1c327e9ee1a5a2ba1047a92497cee3b178063733dadc9fe"},"schema_version":"1.0","source":{"id":"2007.11574","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2007.11574","created_at":"2026-07-05T02:06:31Z"},{"alias_kind":"arxiv_version","alias_value":"2007.11574v2","created_at":"2026-07-05T02:06:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2007.11574","created_at":"2026-07-05T02:06:31Z"},{"alias_kind":"pith_short_12","alias_value":"B4ZCA76DV6PT","created_at":"2026-07-05T02:06:31Z"},{"alias_kind":"pith_short_16","alias_value":"B4ZCA76DV6PT6F4W","created_at":"2026-07-05T02:06:31Z"},{"alias_kind":"pith_short_8","alias_value":"B4ZCA76D","created_at":"2026-07-05T02:06:31Z"}],"graph_snapshots":[{"event_id":"sha256:91324948513f0ae8bb30978e9f25cd60a93b57ad6eecb9c91c9f5511810792e5","target":"graph","created_at":"2026-07-05T02:06:31Z","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/2007.11574/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We propose a solar thermal energy conversion system consisting of a solar absorber, a thermoradiative cell or negative illumination photodiode, and a photovoltaic cell. Because it is a heat engine, this system can also be paired with thermal storage to provide reliable electricity generation. Heat from the solar absorber drives radiative recombination current in the thermoradiative cell, and its emitted light is absorbed by the photovoltaic cell to provide an additional photocurrent. Based on the principle of detailed balance, we calculate a limiting solar conversion efficiency of 85% for full","authors_text":"Andrew J. Ferguson, Eric J. Tervo, Eric S. Toberer, Myles A. Steiner, William A. Callahan","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2020-07-22T17:55:34Z","title":"Solar Thermoradiative-Photovoltaic Energy Conversion"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2007.11574","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:b775105b03d87636e4f16bca69dfbea741204c639ce14a4470942313742bc1ca","target":"record","created_at":"2026-07-05T02:06:31Z","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":"c8eaa2c3b85fc3c0b545c247bc4c703f50f0564e0a5307a0a0436dd2e51e5e8e","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2020-07-22T17:55:34Z","title_canon_sha256":"627699a8b76c5dc7a1c327e9ee1a5a2ba1047a92497cee3b178063733dadc9fe"},"schema_version":"1.0","source":{"id":"2007.11574","kind":"arxiv","version":2}},"canonical_sha256":"0f32207fc3af9f3f179623548cb84dc8eeef6d5d0f7c73868846f52744cbb67c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"0f32207fc3af9f3f179623548cb84dc8eeef6d5d0f7c73868846f52744cbb67c","first_computed_at":"2026-07-05T02:06:31.973602Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T02:06:31.973602Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"+yhUfzJ7Paxpk/6L68knVpwHz/A0HsNLd0bAYTbMSISqiu1qM2/o8qTFujGdwJrWZ0xFmYhYn6fIvyepyoThCQ==","signature_status":"signed_v1","signed_at":"2026-07-05T02:06:31.974040Z","signed_message":"canonical_sha256_bytes"},"source_id":"2007.11574","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:b775105b03d87636e4f16bca69dfbea741204c639ce14a4470942313742bc1ca","sha256:91324948513f0ae8bb30978e9f25cd60a93b57ad6eecb9c91c9f5511810792e5"],"state_sha256":"91921241b14cc2682c052aa4ce9ba80edeb5aeecb87bcaf77fb2aa0eb40b476a"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"elYIad11xEDppy8RuCPqZHhwU1NAQpy5uanzEF6LPnAj7dqHRlhR2vW2eyy79eCZDKph05CwC5leNPPtb3nmCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-04T05:18:29.598091Z","bundle_sha256":"11ead28c7832ff9a24333ca4a825de38feff98f2f46eb6f559f55f61613741cb"}}