{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:DCDUSN22DJQE4FBOU6KO7ZU2I6","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":"9afae9d4b42d8d31fa50885599edb6982e1e2a813b813bc4925137fa1c1d4b8e","cross_cats_sorted":["physics.app-ph"],"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2021-04-07T17:48:19Z","title_canon_sha256":"37a24f757966e40b620ac6c2acaf74bcf419a5a6b7757ae051cbbed74550a806"},"schema_version":"1.0","source":{"id":"2104.03288","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2104.03288","created_at":"2026-07-05T02:30:09Z"},{"alias_kind":"arxiv_version","alias_value":"2104.03288v1","created_at":"2026-07-05T02:30:09Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2104.03288","created_at":"2026-07-05T02:30:09Z"},{"alias_kind":"pith_short_12","alias_value":"DCDUSN22DJQE","created_at":"2026-07-05T02:30:09Z"},{"alias_kind":"pith_short_16","alias_value":"DCDUSN22DJQE4FBO","created_at":"2026-07-05T02:30:09Z"},{"alias_kind":"pith_short_8","alias_value":"DCDUSN22","created_at":"2026-07-05T02:30:09Z"}],"graph_snapshots":[{"event_id":"sha256:0772e9bbbc191674d6144dc9ea0a155abb6d689c2d022957b41d0d41eb8e8a69","target":"graph","created_at":"2026-07-05T02:30:09Z","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/2104.03288/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Reducing the formation of cracks during growth of GaInP/GaInAs/Ge 3-junction solar cells on Ge|Si virtual substrates has been attempted by thinning the structure, namely the Ge bottom cell and the GaInAs middle cell. The theoretical analysis performed using realistic device parameters indicates that the GaInAs middle cell can be drastically thinned to 1000 nm while increasing its In content to 8% with an efficiency loss in the 3-junction cell below 3%. The experimental results show that the formation of macroscopic cracks is prevented in thinned GaInAs/Ge 2-junction and GaInP/GaInAs/Ge 3-junct","authors_text":"Andrew Johnson, Ignacio Rey-Stolle, Ivan Garc\\'ia, Laura Barrutia, Manuel Hinojosa, Shabnam Dadgostar","cross_cats":["physics.app-ph"],"headline":"","license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2021-04-07T17:48:19Z","title":"Thinned GaInP/GaInAs/Ge solar cells grown with reduced cracking on Ge|Si virtual substrates"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2104.03288","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":"sha256:53237d5c7ce1c8d922f839f1c5f49efbdaaf69c8fea44ccf3e23860979d610d9","target":"record","created_at":"2026-07-05T02:30:09Z","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":"9afae9d4b42d8d31fa50885599edb6982e1e2a813b813bc4925137fa1c1d4b8e","cross_cats_sorted":["physics.app-ph"],"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2021-04-07T17:48:19Z","title_canon_sha256":"37a24f757966e40b620ac6c2acaf74bcf419a5a6b7757ae051cbbed74550a806"},"schema_version":"1.0","source":{"id":"2104.03288","kind":"arxiv","version":1}},"canonical_sha256":"188749375a1a604e142ea794efe69a47bbd64875f57f0eda77831c92d81a9ad6","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"188749375a1a604e142ea794efe69a47bbd64875f57f0eda77831c92d81a9ad6","first_computed_at":"2026-07-05T02:30:09.498258Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T02:30:09.498258Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"B/XBh7P4SOeN/Jatj9pWMZQGTeP8QYQhxhv2lBe43c4/NvcqALUrbRNWenj4w4ZWZplk4as2ssTzTeMDxPFZAg==","signature_status":"signed_v1","signed_at":"2026-07-05T02:30:09.498779Z","signed_message":"canonical_sha256_bytes"},"source_id":"2104.03288","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:53237d5c7ce1c8d922f839f1c5f49efbdaaf69c8fea44ccf3e23860979d610d9","sha256:0772e9bbbc191674d6144dc9ea0a155abb6d689c2d022957b41d0d41eb8e8a69"],"state_sha256":"7eef14be33a4a4d99871d277e71547261485939dc3992e49c69d98acb6177770"}