{"record":{"author":{"account_ref":null,"orcid":null},"builds_on":[],"content_schema":"pubphys.content.revision/1","content_sha256":"2914d258e350773629b6038b8621fa676e4ad3951c328efdddbd3a0c4f42172b","created":"2026-10-15T23:43:22Z","files":[],"origin":{"assisted_by":[],"kind":"seed"},"parents":["336fc456cb269ec91cfabe857a53793c885a02c07fd341058d65f678f8c42ae3","ce59fb6cd812fc05906d0c60a71c75ea22bc686bcf38e7c3ef7010834d98ee7b"],"salt":"ccff7d4595cf82fb172abfae18707a514e0ae13c3c481fd0e9cf969e932785f8","schema":"pubphys.record/2","site":"pubphys.com","target":null,"type":"revision"},"content":{"answer_type":"mechanism","assisted_by":[],"external_id":"cm.halide-perovskites.defect-tolerance","kind":"phenomenon","literature_status":"contested","n":"2","parents":[],"plain":"Solution-made perovskite films have many defects, yet light-generated charges in them survive for millionths of a second, much longer than in comparably imperfect ordinary semiconductors. Proposed reasons include charges wrapped in lattice distortions (polarons), a constantly fluctuating lattice, and defects whose energy levels lie harmlessly near the band edges.","posed_since":"","precise":"In MAPbI3, FAPbI3 and $\\mathrm{CsPbBr_3}$, nonradiative lifetimes reach about $10^{-6}$ s at trap densities of order $10^{15}\\ \\text{to}\\ 10^{16}\\,\\mathrm{cm}^{-3}$ despite modest mobilities. Determine which mechanism dominates the suppression of Shockley-Read-Hall (defect-mediated) recombination: shallow intrinsic defect levels from antibonding valence-band character, large-polaron screening of capture, dynamic disorder reducing capture cross sections, or spin-split (Rashba) band edges. An answer is a ranking of mechanisms with first-principles nonadiabatic capture rates matching measured lifetimes versus $T$ and composition.","problem_ref":"336fc456cb269ec91cfabe857a53793c885a02c07fd341058d65f678f8c42ae3","references":"","settled_by":"Computed capture coefficients for the dominant defects, including anharmonic lattice dynamics, that reproduce measured lifetimes and their temperature dependence.","status_note":"","title":"Why lead-halide perovskites keep long carrier lifetimes despite defects","topic_ref":null},"attested":{"attestation":{"batch":null,"client_id":null,"id_token_sha256":null,"kind":"platform"},"record_hash":"4345788d0d1d876b02be1034e50c8f022267b7ea1ba492a5d77090209671d1ec","schema":"pubphys.attested/1"},"envelope":{"attested_hash":"bdae99d135e97167aa7fd4de5dcd91ebb0fca024291c1577f7685ec243f88d0c","platform_signature":{"key_id":"c6afc19b31429869751f06879c75cd64ea92654423d15b44be775bf1310a60da","sig":"rHoBkB2scPppVHZi4AuWJpxkeH3plMNLJp4jknY72CcLuBXg1iUOvsqhFF-EtVoq7nXDFvRDVCP1vGjXkk3SAQ"},"schema":"pubphys.envelope/1"},"record_hash":"4345788d0d1d876b02be1034e50c8f022267b7ea1ba492a5d77090209671d1ec","leaf_index":2820}