{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:5CGYUGRRP2CA6AK63YIYHZZCOM","short_pith_number":"pith:5CGYUGRR","canonical_record":{"source":{"id":"1212.6477","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2012-12-28T07:01:41Z","cross_cats_sorted":["cond-mat.mtrl-sci"],"title_canon_sha256":"15c33d35d9ddc4a98fa26e0a4e07a7eac6d6599fbf64a7036546a7946e5881f5","abstract_canon_sha256":"00be69c919ad9cf515ed8dc8409b55ea403b5f52887328cabfcf6667b27bdca6"},"schema_version":"1.0"},"canonical_sha256":"e88d8a1a317e840f015ede1183e722733516709eb7a79f3873b6daba1d568350","source":{"kind":"arxiv","id":"1212.6477","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1212.6477","created_at":"2026-05-18T03:12:48Z"},{"alias_kind":"arxiv_version","alias_value":"1212.6477v1","created_at":"2026-05-18T03:12:48Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1212.6477","created_at":"2026-05-18T03:12:48Z"},{"alias_kind":"pith_short_12","alias_value":"5CGYUGRRP2CA","created_at":"2026-05-18T12:26:53Z"},{"alias_kind":"pith_short_16","alias_value":"5CGYUGRRP2CA6AK6","created_at":"2026-05-18T12:26:53Z"},{"alias_kind":"pith_short_8","alias_value":"5CGYUGRR","created_at":"2026-05-18T12:26:53Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:5CGYUGRRP2CA6AK63YIYHZZCOM","target":"record","payload":{"canonical_record":{"source":{"id":"1212.6477","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2012-12-28T07:01:41Z","cross_cats_sorted":["cond-mat.mtrl-sci"],"title_canon_sha256":"15c33d35d9ddc4a98fa26e0a4e07a7eac6d6599fbf64a7036546a7946e5881f5","abstract_canon_sha256":"00be69c919ad9cf515ed8dc8409b55ea403b5f52887328cabfcf6667b27bdca6"},"schema_version":"1.0"},"canonical_sha256":"e88d8a1a317e840f015ede1183e722733516709eb7a79f3873b6daba1d568350","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:12:48.403820Z","signature_b64":"iObs8Me6lDOu+CmLQBGdry7NWHJz9U7yQy7T4nn0lR1+19+dXLuOixZNlPxFF3Yo+fxGKYGo9nZwz0u7UqTJDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e88d8a1a317e840f015ede1183e722733516709eb7a79f3873b6daba1d568350","last_reissued_at":"2026-05-18T03:12:48.403007Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:12:48.403007Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1212.6477","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":"2026-05-18T03:12:48Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"uaKessva+a/ll0UYl8lW/ALaUjbvsqqrntgxPPzCuMb8mwWKzoYCi6LUi97zCSp38ULPGGbWIok5GH2YN2cwDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T13:52:52.988746Z"},"content_sha256":"3a158821c257b634611cb79008af7e9bc648ad22dc63e173fb2b5b7a41d2fbc0","schema_version":"1.0","event_id":"sha256:3a158821c257b634611cb79008af7e9bc648ad22dc63e173fb2b5b7a41d2fbc0"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:5CGYUGRRP2CA6AK63YIYHZZCOM","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Narrow-bandwidth solar upconversion: design principles, efficiency limits, and case studies","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.mtrl-sci"],"primary_cat":"physics.optics","authors_text":"Ashwin C. Atre, Jennifer A. Dionne, Justin A. Briggs","submitted_at":"2012-12-28T07:01:41Z","abstract_excerpt":"We employ a detailed balance approach to model a single-junction solar cell with a realistic narrow-band, non-unity-quantum-yield upconverter. As upconverter bandwidths are increased from 0 to 0.5 eV, maximum cell efficiencies increase from the Shockley-Queisser limit of 30.58% to over 43%. Such efficiency enhancements are calculated for upconverters with near-infrared spectral absorption bands, readily accessible with existing upconverters. While our model shows that current bimolecular and lanthanide-based upconverting materials will improve cell efficiencies by <1%, cell efficiencies can in"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1212.6477","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":"2026-05-18T03:12:48Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0mT5lr6G+DD9bqwqGc/oZ0zCw0vQsUfLfwKXCPwgaYgUz+CnthNCezCLNPjM9Nl7kAo7L0Jtk14op33YmDinBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T13:52:52.989098Z"},"content_sha256":"a93ab76aca7710947af576662d8ea7e5bff23fef48817129f92512d05a04fb38","schema_version":"1.0","event_id":"sha256:a93ab76aca7710947af576662d8ea7e5bff23fef48817129f92512d05a04fb38"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/5CGYUGRRP2CA6AK63YIYHZZCOM/bundle.json","state_url":"https://pith.science/pith/5CGYUGRRP2CA6AK63YIYHZZCOM/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/5CGYUGRRP2CA6AK63YIYHZZCOM/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":"2026-06-01T13:52:52Z","links":{"resolver":"https://pith.science/pith/5CGYUGRRP2CA6AK63YIYHZZCOM","bundle":"https://pith.science/pith/5CGYUGRRP2CA6AK63YIYHZZCOM/bundle.json","state":"https://pith.science/pith/5CGYUGRRP2CA6AK63YIYHZZCOM/state.json","well_known_bundle":"https://pith.science/.well-known/pith/5CGYUGRRP2CA6AK63YIYHZZCOM/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:5CGYUGRRP2CA6AK63YIYHZZCOM","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":"00be69c919ad9cf515ed8dc8409b55ea403b5f52887328cabfcf6667b27bdca6","cross_cats_sorted":["cond-mat.mtrl-sci"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2012-12-28T07:01:41Z","title_canon_sha256":"15c33d35d9ddc4a98fa26e0a4e07a7eac6d6599fbf64a7036546a7946e5881f5"},"schema_version":"1.0","source":{"id":"1212.6477","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1212.6477","created_at":"2026-05-18T03:12:48Z"},{"alias_kind":"arxiv_version","alias_value":"1212.6477v1","created_at":"2026-05-18T03:12:48Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1212.6477","created_at":"2026-05-18T03:12:48Z"},{"alias_kind":"pith_short_12","alias_value":"5CGYUGRRP2CA","created_at":"2026-05-18T12:26:53Z"},{"alias_kind":"pith_short_16","alias_value":"5CGYUGRRP2CA6AK6","created_at":"2026-05-18T12:26:53Z"},{"alias_kind":"pith_short_8","alias_value":"5CGYUGRR","created_at":"2026-05-18T12:26:53Z"}],"graph_snapshots":[{"event_id":"sha256:a93ab76aca7710947af576662d8ea7e5bff23fef48817129f92512d05a04fb38","target":"graph","created_at":"2026-05-18T03:12:48Z","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":"We employ a detailed balance approach to model a single-junction solar cell with a realistic narrow-band, non-unity-quantum-yield upconverter. As upconverter bandwidths are increased from 0 to 0.5 eV, maximum cell efficiencies increase from the Shockley-Queisser limit of 30.58% to over 43%. Such efficiency enhancements are calculated for upconverters with near-infrared spectral absorption bands, readily accessible with existing upconverters. While our model shows that current bimolecular and lanthanide-based upconverting materials will improve cell efficiencies by <1%, cell efficiencies can in","authors_text":"Ashwin C. Atre, Jennifer A. Dionne, Justin A. Briggs","cross_cats":["cond-mat.mtrl-sci"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2012-12-28T07:01:41Z","title":"Narrow-bandwidth solar upconversion: design principles, efficiency limits, and case studies"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1212.6477","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":"sha256:3a158821c257b634611cb79008af7e9bc648ad22dc63e173fb2b5b7a41d2fbc0","target":"record","created_at":"2026-05-18T03:12:48Z","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":"00be69c919ad9cf515ed8dc8409b55ea403b5f52887328cabfcf6667b27bdca6","cross_cats_sorted":["cond-mat.mtrl-sci"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2012-12-28T07:01:41Z","title_canon_sha256":"15c33d35d9ddc4a98fa26e0a4e07a7eac6d6599fbf64a7036546a7946e5881f5"},"schema_version":"1.0","source":{"id":"1212.6477","kind":"arxiv","version":1}},"canonical_sha256":"e88d8a1a317e840f015ede1183e722733516709eb7a79f3873b6daba1d568350","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e88d8a1a317e840f015ede1183e722733516709eb7a79f3873b6daba1d568350","first_computed_at":"2026-05-18T03:12:48.403007Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:12:48.403007Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"iObs8Me6lDOu+CmLQBGdry7NWHJz9U7yQy7T4nn0lR1+19+dXLuOixZNlPxFF3Yo+fxGKYGo9nZwz0u7UqTJDg==","signature_status":"signed_v1","signed_at":"2026-05-18T03:12:48.403820Z","signed_message":"canonical_sha256_bytes"},"source_id":"1212.6477","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:3a158821c257b634611cb79008af7e9bc648ad22dc63e173fb2b5b7a41d2fbc0","sha256:a93ab76aca7710947af576662d8ea7e5bff23fef48817129f92512d05a04fb38"],"state_sha256":"2729f57c1062e6febd23a7e46d8133d7b8208772d34b1ef533d4d6d9376451c6"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"RzI9w52Z9ImSjjlcPjm6Y0QPiVpEtJGrzih6SbwFR+0OMFPt5W0/0T64K7fChJXY7ODE4YBJTAfc6FsI/kEBDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-01T13:52:52.991157Z","bundle_sha256":"023031373d9c2c8a79e282531ce76a477d555a73ef662616b8891d776ae31c1a"}}