{"record":{"author":{"account_ref":null,"orcid":null},"builds_on":[],"content_schema":"pubphys.content.revision/1","content_sha256":"1e5e4762595483d6b756f0d9661eb3edaa33312b131c2b17dbecd382f5b3fb90","created":"2026-10-03T07:17:59Z","files":[],"origin":{"assisted_by":[],"kind":"seed"},"parents":["5475cf5dc5b1a72283d26dc95dc6e00d7ea4e00096a7c6492e409a1816eeb011"],"salt":"940541aff541ca833a24cd3e5fe892d2e658c419ac5b8b376b8f179ab0726982","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":"1","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 CsPbBr3, nonradiative lifetimes reach about 1e-6 s at trap densities of order $1e15\\ \\text{to}\\ 1e16\\,\\mathrm{cm}^{-3}$ 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":null,"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":"56bceea3ae46655d4fa657e5e962c04f828a636d2ee81dabedfcad2bf6f6582c"},"attested":{"attestation":{"batch":null,"client_id":null,"id_token_sha256":null,"kind":"platform"},"record_hash":"336fc456cb269ec91cfabe857a53793c885a02c07fd341058d65f678f8c42ae3","schema":"pubphys.attested/1"},"envelope":{"attested_hash":"c99432c20ca4cfc50ee40f1930b813b4a2a54beb6c54bfcf1285032bf451fafb","platform_signature":{"key_id":"c6afc19b31429869751f06879c75cd64ea92654423d15b44be775bf1310a60da","sig":"oK0IEaU4t6vuHWdEqaGgzXbDjdv1czWnRr5eZpArQOUD-CjzhFPem6ukwL9-doFGsU7VIiUZ6kidvl6X3rc0Dg"},"schema":"pubphys.envelope/1"},"record_hash":"336fc456cb269ec91cfabe857a53793c885a02c07fd341058d65f678f8c42ae3","leaf_index":1003}