{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2023:TJJP3GSYOPNFEKZJKOSQXBR3Z7","short_pith_number":"pith:TJJP3GSY","schema_version":"1.0","canonical_sha256":"9a52fd9a5873da522b2953a50b863bcffcf8831e1c95338f99e614281e2a1c15","source":{"kind":"arxiv","id":"2304.13788","version":1},"attestation_state":"computed","paper":{"title":"Resolving the Hydrophobicity of Me-4PACz Hole Transport Layer for High-Efficiency Inverted Perovskite Solar Cells","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Ashish Kulkarni, Benjamin Klingebiel, Dinesh Kabra, Kashimul Hossain, Michael Saliba, Thomas Kirchartz, Urvashi Bothra","submitted_at":"2023-04-26T19:14:18Z","abstract_excerpt":"[4-(3,6-dimethyl-9H-carbazole-9-yl)butyl]phosphonic acid (Me-4PACz) self-assembled monolayer (SAM) has been employed in perovskite single junction and tandem devices demonstrating high efficiencies. However, a uniform perovskite layer does not form due to the hydrophobicity of Me-4PACz. Here, we tackle this challenge by adding a conjugated polyelectrolyte poly(9,9-bis(3'-(N,N-dimethyl)-N-ethylammonium-propyl-2,7-fluorene)-alt-2,7-(9,9dioctylfluorene)dibromide (PFN-Br) to the Me-4PACz in a specific ratio, defines as Pz:PFN. With this mixing engineering strategy of Pz:PFN, the PFN-Br interacts w"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"2304.13788","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2023-04-26T19:14:18Z","cross_cats_sorted":[],"title_canon_sha256":"a0fa18e5cc0f4da30471549d9b9efbfbd4e51341594fd4757c989be98ce9313b","abstract_canon_sha256":"270625c2af084e4421a7249a1de22f1f6649918eea1196d3f90282f7add7535f"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T06:04:57.245760Z","signature_b64":"J0U2NzkwzvPeW7uipYMbSpzjBP7bGRblyguyTHtBHiztTHw1yVycSZx02F4+/nIh+PacOhci9UjGcKnXPFbOBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"9a52fd9a5873da522b2953a50b863bcffcf8831e1c95338f99e614281e2a1c15","last_reissued_at":"2026-07-05T06:04:57.245376Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T06:04:57.245376Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Resolving the Hydrophobicity of Me-4PACz Hole Transport Layer for High-Efficiency Inverted Perovskite Solar Cells","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Ashish Kulkarni, Benjamin Klingebiel, Dinesh Kabra, Kashimul Hossain, Michael Saliba, Thomas Kirchartz, Urvashi Bothra","submitted_at":"2023-04-26T19:14:18Z","abstract_excerpt":"[4-(3,6-dimethyl-9H-carbazole-9-yl)butyl]phosphonic acid (Me-4PACz) self-assembled monolayer (SAM) has been employed in perovskite single junction and tandem devices demonstrating high efficiencies. However, a uniform perovskite layer does not form due to the hydrophobicity of Me-4PACz. Here, we tackle this challenge by adding a conjugated polyelectrolyte poly(9,9-bis(3'-(N,N-dimethyl)-N-ethylammonium-propyl-2,7-fluorene)-alt-2,7-(9,9dioctylfluorene)dibromide (PFN-Br) to the Me-4PACz in a specific ratio, defines as Pz:PFN. With this mixing engineering strategy of Pz:PFN, the PFN-Br interacts w"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2304.13788","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2304.13788/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"},"aliases":[{"alias_kind":"arxiv","alias_value":"2304.13788","created_at":"2026-07-05T06:04:57.245435+00:00"},{"alias_kind":"arxiv_version","alias_value":"2304.13788v1","created_at":"2026-07-05T06:04:57.245435+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2304.13788","created_at":"2026-07-05T06:04:57.245435+00:00"},{"alias_kind":"pith_short_12","alias_value":"TJJP3GSYOPNF","created_at":"2026-07-05T06:04:57.245435+00:00"},{"alias_kind":"pith_short_16","alias_value":"TJJP3GSYOPNFEKZJ","created_at":"2026-07-05T06:04:57.245435+00:00"},{"alias_kind":"pith_short_8","alias_value":"TJJP3GSY","created_at":"2026-07-05T06:04:57.245435+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/TJJP3GSYOPNFEKZJKOSQXBR3Z7","json":"https://pith.science/pith/TJJP3GSYOPNFEKZJKOSQXBR3Z7.json","graph_json":"https://pith.science/api/pith-number/TJJP3GSYOPNFEKZJKOSQXBR3Z7/graph.json","events_json":"https://pith.science/api/pith-number/TJJP3GSYOPNFEKZJKOSQXBR3Z7/events.json","paper":"https://pith.science/paper/TJJP3GSY"},"agent_actions":{"view_html":"https://pith.science/pith/TJJP3GSYOPNFEKZJKOSQXBR3Z7","download_json":"https://pith.science/pith/TJJP3GSYOPNFEKZJKOSQXBR3Z7.json","view_paper":"https://pith.science/paper/TJJP3GSY","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2304.13788&json=true","fetch_graph":"https://pith.science/api/pith-number/TJJP3GSYOPNFEKZJKOSQXBR3Z7/graph.json","fetch_events":"https://pith.science/api/pith-number/TJJP3GSYOPNFEKZJKOSQXBR3Z7/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/TJJP3GSYOPNFEKZJKOSQXBR3Z7/action/timestamp_anchor","attest_storage":"https://pith.science/pith/TJJP3GSYOPNFEKZJKOSQXBR3Z7/action/storage_attestation","attest_author":"https://pith.science/pith/TJJP3GSYOPNFEKZJKOSQXBR3Z7/action/author_attestation","sign_citation":"https://pith.science/pith/TJJP3GSYOPNFEKZJKOSQXBR3Z7/action/citation_signature","submit_replication":"https://pith.science/pith/TJJP3GSYOPNFEKZJKOSQXBR3Z7/action/replication_record"}},"created_at":"2026-07-05T06:04:57.245435+00:00","updated_at":"2026-07-05T06:04:57.245435+00:00"}