{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:3J6663T2PRPKWHSAI745LPC5G4","short_pith_number":"pith:3J6663T2","canonical_record":{"source":{"id":"1803.07701","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2018-03-21T00:27:34Z","cross_cats_sorted":["cond-mat.mtrl-sci"],"title_canon_sha256":"b84b71de9769d988554246def7520d3ea83adf087b352d7f2b14204d720980b3","abstract_canon_sha256":"78396a5d1708a7afa60e05e8c14d80c5df9ccb08201c56182b54b568124161dc"},"schema_version":"1.0"},"canonical_sha256":"da7def6e7a7c5eab1e4047f9d5bc5d3702cbf2d8d3e7bdded2fc68d2a5674b0e","source":{"kind":"arxiv","id":"1803.07701","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1803.07701","created_at":"2026-05-18T00:20:29Z"},{"alias_kind":"arxiv_version","alias_value":"1803.07701v1","created_at":"2026-05-18T00:20:29Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1803.07701","created_at":"2026-05-18T00:20:29Z"},{"alias_kind":"pith_short_12","alias_value":"3J6663T2PRPK","created_at":"2026-05-18T12:32:02Z"},{"alias_kind":"pith_short_16","alias_value":"3J6663T2PRPKWHSA","created_at":"2026-05-18T12:32:02Z"},{"alias_kind":"pith_short_8","alias_value":"3J6663T2","created_at":"2026-05-18T12:32:02Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:3J6663T2PRPKWHSAI745LPC5G4","target":"record","payload":{"canonical_record":{"source":{"id":"1803.07701","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2018-03-21T00:27:34Z","cross_cats_sorted":["cond-mat.mtrl-sci"],"title_canon_sha256":"b84b71de9769d988554246def7520d3ea83adf087b352d7f2b14204d720980b3","abstract_canon_sha256":"78396a5d1708a7afa60e05e8c14d80c5df9ccb08201c56182b54b568124161dc"},"schema_version":"1.0"},"canonical_sha256":"da7def6e7a7c5eab1e4047f9d5bc5d3702cbf2d8d3e7bdded2fc68d2a5674b0e","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:20:29.235199Z","signature_b64":"6wMavgGCwfZE/AvbWVvY4ng3h5M6UliVu3ReknnHLBqATJMb44xjp73SF3FQyVJ3lM6ZitgbmaxNyR4Ggej+DA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"da7def6e7a7c5eab1e4047f9d5bc5d3702cbf2d8d3e7bdded2fc68d2a5674b0e","last_reissued_at":"2026-05-18T00:20:29.233350Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:20:29.233350Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1803.07701","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":"2026-05-18T00:20:29Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"bPoEaJPa6zDqHwSjF1zbrho5HNPcR0T4GMoJWq4ynoA2RMZk/YbTHhL4K2FoEa+eOLg/EBHq6T1MCvBtw65dAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-06T12:37:11.737050Z"},"content_sha256":"1bc99fd743aa326e3e0b4f7078abeeba70a9c3364c301204e9153b98db1a6947","schema_version":"1.0","event_id":"sha256:1bc99fd743aa326e3e0b4f7078abeeba70a9c3364c301204e9153b98db1a6947"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:3J6663T2PRPKWHSAI745LPC5G4","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Very high efficiency of low cost graphite-based solar cell by improving the fill factor using optimal ion concentration in polymer electrolyte","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.mtrl-sci"],"primary_cat":"physics.app-ph","authors_text":"Asep Ridwan Setiawan, Dui Yanto Rahman, Euis Sustini, Fisca Dian Utami, Mikrajuddin Abdullah","submitted_at":"2018-03-21T00:27:34Z","abstract_excerpt":"We report the development of graphite-based solar cells using a simple method and low cost materials. Suspension of graphite powder in mineral water was simply dropped onto the surface of fluorine-doped tin oxide glass (FTO) to form a thick film. Surprisingly, using mineral waters greatly improved the efficiency of the solar cell to reach the highest efficiency of 6.97%. Due to some minerals contained, the mineral water induced the development of fibrous structure between the graphite particles which is assumed to play a role as a bridge for the photoexcited electrons to quickly move to the el"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1803.07701","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":"2026-05-18T00:20:29Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"HDpUfqobOB/cIE81fe9nUTNjosNRWEQbw4339tU7RkhYCLKE3uLhjINzmchA9t8CW1Q9s08/53x8T/pYps3vDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-06T12:37:11.737721Z"},"content_sha256":"d59266d0362d3fff98b7a32998a08b9ad6e551b54305bc1e31b92e6aae212a30","schema_version":"1.0","event_id":"sha256:d59266d0362d3fff98b7a32998a08b9ad6e551b54305bc1e31b92e6aae212a30"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/3J6663T2PRPKWHSAI745LPC5G4/bundle.json","state_url":"https://pith.science/pith/3J6663T2PRPKWHSAI745LPC5G4/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/3J6663T2PRPKWHSAI745LPC5G4/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":"2026-06-06T12:37:11Z","links":{"resolver":"https://pith.science/pith/3J6663T2PRPKWHSAI745LPC5G4","bundle":"https://pith.science/pith/3J6663T2PRPKWHSAI745LPC5G4/bundle.json","state":"https://pith.science/pith/3J6663T2PRPKWHSAI745LPC5G4/state.json","well_known_bundle":"https://pith.science/.well-known/pith/3J6663T2PRPKWHSAI745LPC5G4/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:3J6663T2PRPKWHSAI745LPC5G4","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":"78396a5d1708a7afa60e05e8c14d80c5df9ccb08201c56182b54b568124161dc","cross_cats_sorted":["cond-mat.mtrl-sci"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2018-03-21T00:27:34Z","title_canon_sha256":"b84b71de9769d988554246def7520d3ea83adf087b352d7f2b14204d720980b3"},"schema_version":"1.0","source":{"id":"1803.07701","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1803.07701","created_at":"2026-05-18T00:20:29Z"},{"alias_kind":"arxiv_version","alias_value":"1803.07701v1","created_at":"2026-05-18T00:20:29Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1803.07701","created_at":"2026-05-18T00:20:29Z"},{"alias_kind":"pith_short_12","alias_value":"3J6663T2PRPK","created_at":"2026-05-18T12:32:02Z"},{"alias_kind":"pith_short_16","alias_value":"3J6663T2PRPKWHSA","created_at":"2026-05-18T12:32:02Z"},{"alias_kind":"pith_short_8","alias_value":"3J6663T2","created_at":"2026-05-18T12:32:02Z"}],"graph_snapshots":[{"event_id":"sha256:d59266d0362d3fff98b7a32998a08b9ad6e551b54305bc1e31b92e6aae212a30","target":"graph","created_at":"2026-05-18T00:20:29Z","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 report the development of graphite-based solar cells using a simple method and low cost materials. Suspension of graphite powder in mineral water was simply dropped onto the surface of fluorine-doped tin oxide glass (FTO) to form a thick film. Surprisingly, using mineral waters greatly improved the efficiency of the solar cell to reach the highest efficiency of 6.97%. Due to some minerals contained, the mineral water induced the development of fibrous structure between the graphite particles which is assumed to play a role as a bridge for the photoexcited electrons to quickly move to the el","authors_text":"Asep Ridwan Setiawan, Dui Yanto Rahman, Euis Sustini, Fisca Dian Utami, Mikrajuddin Abdullah","cross_cats":["cond-mat.mtrl-sci"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2018-03-21T00:27:34Z","title":"Very high efficiency of low cost graphite-based solar cell by improving the fill factor using optimal ion concentration in polymer electrolyte"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1803.07701","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":"sha256:1bc99fd743aa326e3e0b4f7078abeeba70a9c3364c301204e9153b98db1a6947","target":"record","created_at":"2026-05-18T00:20:29Z","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":"78396a5d1708a7afa60e05e8c14d80c5df9ccb08201c56182b54b568124161dc","cross_cats_sorted":["cond-mat.mtrl-sci"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2018-03-21T00:27:34Z","title_canon_sha256":"b84b71de9769d988554246def7520d3ea83adf087b352d7f2b14204d720980b3"},"schema_version":"1.0","source":{"id":"1803.07701","kind":"arxiv","version":1}},"canonical_sha256":"da7def6e7a7c5eab1e4047f9d5bc5d3702cbf2d8d3e7bdded2fc68d2a5674b0e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"da7def6e7a7c5eab1e4047f9d5bc5d3702cbf2d8d3e7bdded2fc68d2a5674b0e","first_computed_at":"2026-05-18T00:20:29.233350Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:20:29.233350Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"6wMavgGCwfZE/AvbWVvY4ng3h5M6UliVu3ReknnHLBqATJMb44xjp73SF3FQyVJ3lM6ZitgbmaxNyR4Ggej+DA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:20:29.235199Z","signed_message":"canonical_sha256_bytes"},"source_id":"1803.07701","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:1bc99fd743aa326e3e0b4f7078abeeba70a9c3364c301204e9153b98db1a6947","sha256:d59266d0362d3fff98b7a32998a08b9ad6e551b54305bc1e31b92e6aae212a30"],"state_sha256":"2f9f4856cb6791d9819f0ec1ad1cdb86fa9406eaa2cf68505ee0ef750b6a4e98"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"OoyPwmfpTs5ECdLruXclzk9IirBNSdUR/Nqr2qhYAI7b9fAQ4y8LAjjZswV284Uopz4GbMxu8t4/XTS//ojvAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-06T12:37:11.740717Z","bundle_sha256":"f9c09759a2880bc74bb3da75d17c228db160f051bc3e22062093d09f46272fc3"}}