{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,12]],"date-time":"2026-10-12T12:48:32Z","timestamp":1791809312147,"version":"4.3.4"},"reference-count":31,"publisher":"IOP Publishing","issue":"41","license":[{"start":{"date-parts":[[2026,10,12]],"date-time":"2026-10-12T00:00:00Z","timestamp":1791763200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/publishingsupport.iopscience.iop.org\/iop-standard\/v1"},{"start":{"date-parts":[[2026,10,12]],"date-time":"2026-10-12T00:00:00Z","timestamp":1791763200000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/iopscience.iop.org\/info\/page\/text-and-data-mining"},{"start":{"date-parts":[[2026,10,12]],"date-time":"2026-10-12T00:00:00Z","timestamp":1791763200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/publishingsupport.iopscience.iop.org\/questions\/alternative-author-rights-policies\/"},{"start":{"date-parts":[[2026,10,12]],"date-time":"2026-10-12T00:00:00Z","timestamp":1791763200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/publishingsupport.iopscience.iop.org\/questions\/alternative-author-rights-policies\/"}],"funder":[{"name":"National Key R&D Program of China","award":["2021YFB3500403"],"award-info":[{"award-number":["2021YFB3500403"]}]}],"content-domain":{"domain":["iopscience.iop.org"],"crossmark-restriction":false},"short-container-title":["Nanotechnology"],"published-print":{"date-parts":[[2026,10,16]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:p>\n                    Lanthanide-doped lead-free double perovskites (DPs) have attracted significant attention for near-infrared (NIR) optoelectronic applications; however, their luminescence efficiency remains limited by inefficient energy transfer and parity-forbidden 4f\u20134f transitions. Here, we report a lattice distortion engineering strategy to enhance NIR emission in Yb\n                    <jats:sup>3+<\/jats:sup>\n                    -doped Cs\n                    <jats:sub>2<\/jats:sub>\n                    Ag\n                    <jats:sub>1\u2212x<\/jats:sub>\n                    Na\n                    <jats:sub>x<\/jats:sub>\n                    BiCl\n                    <jats:sub>6<\/jats:sub>\n                    DPs synthesized via a hydrothermal method. Systematic Na\n                    <jats:sup>+<\/jats:sup>\n                    substitution induces local symmetry breaking and band structure modulation, which promotes self-trapped exciton (STE) formation and improves energy transfer to Yb\n                    <jats:sup>3+<\/jats:sup>\n                    centers. The optimized composition Cs\n                    <jats:sub>2<\/jats:sub>\n                    Ag\n                    <jats:sub>0.1<\/jats:sub>\n                    Na\n                    <jats:sub>0.9<\/jats:sub>\n                    BiCl\n                    <jats:sub>6<\/jats:sub>\n                    :0.5 mmol% Yb\n                    <jats:sup>3+<\/jats:sup>\n                    exhibits strong NIR emission centered at \u223c1000 nm with a high photoluminescence quantum yield of 64% in the 900\u20131100 nm range. The photoluminescence decay and photoluminescence spectra confirmed the effective energy transfer from STE to Yb\n                    <jats:sup>3+<\/jats:sup>\n                    , while density functional theory calculations and X-ray diffraction Rietveld refinement, Williamson Hall analysis showed that sodium induced lattice distortion altered the electron density of states and reduced non radiative recombination pathways. This work demonstrates a defect- and lattice-engineering approach for achieving high-efficiency NIR emission in lead-free DPs, providing new insights for optical materials in solar energy conversion and photonic applications.\n                  <\/jats:p>","DOI":"10.1088\/1361-6528\/aeae44","type":"journal-article","created":{"date-parts":[[2026,9,30]],"date-time":"2026-09-30T22:48:54Z","timestamp":1790808534000},"page":"415701","update-policy":"https:\/\/doi.org\/10.1088\/crossmark-policy","source":"Crossref","is-referenced-by-count":0,"title":["Lattice distortion-induced enhancement of near-infrared emission in Na\/Yb co-doped Cs\n                    <sub>2<\/sub>\n                    AgBiCl\n                    <sub>6<\/sub>\n                    double perovskites"],"prefix":"10.1088","volume":"37","author":[{"given":"Ying","family":"Liu","sequence":"first","affiliation":[{"name":"Yingli Energy Development Co., Ltd."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Zu-Cai","family":"Zhang","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Materials Low-Carbon Recycling, & College of Material Science and Engineering, Beijing University of Technology"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"En-Zhen","family":"Wang","sequence":"additional","affiliation":[{"name":"Beijing Jingneng Technology Co., Ltd."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Bo","family":"Yu","sequence":"additional","affiliation":[{"name":"Yingli Energy Development Co., Ltd."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Li-Ying","family":"Liu","sequence":"additional","affiliation":[{"name":"Beijing University of Technology"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Guang-Xuan","family":"Zhang","sequence":"additional","affiliation":[{"name":"Beijing University of Technology"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hui-Xiao","family":"Wang","sequence":"additional","affiliation":[{"name":"Yingli Energy Development Co., Ltd."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Meng-Meng","family":"Wu","sequence":"additional","affiliation":[{"name":"Yingli Energy Development Co., Ltd."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yao","family":"Zhang","sequence":"additional","affiliation":[{"name":"Beijing Jingneng Technology Co., Ltd."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Bing","family":"Wang","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Materials Low-Carbon Recycling, & College of Material Science and Engineering, Beijing University of Technology"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yan","family":"Yang","sequence":"additional","affiliation":[{"name":"Yingli Energy Development Co., Ltd."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5430-2157","authenticated-orcid":true,"given":"Ru-Zhi","family":"Wang","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Materials Low-Carbon Recycling, & College of Material Science and Engineering, Beijing University of Technology"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"266","published-online":{"date-parts":[[2026,10,12]]},"reference":[{"key":"nanoaeae44bib1","doi-asserted-by":"publisher","first-page":"16880","DOI":"10.1021\/acsomega.3c08806","type":"journal-article","article-title":"Comprehensive review on downconversion\/downshifting silicate-based phosphors for solar cell applications","volume":"9","author":"Mayavan","year":"2024","journal-title":"ACS Omega"},{"key":"nanoaeae44bib2","doi-asserted-by":"publisher","first-page":"7112","DOI":"10.1021\/acsaem.1c01194","type":"journal-article","article-title":"Enhanced power conversion efficiency using a Ce3+:SrF2 down-shifting nanophosphor-based photoelectrode for dye-sensitized solar cell applications","volume":"4","author":"Samuel","year":"2021","journal-title":"ACS Appl. 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All rights, including for text and data mining, AI training, and similar technologies, are reserved.","name":"copyright_information","label":"Copyright Information"},{"value":"2026-07-14","name":"date_received","label":"Date Received","group":{"name":"publication_dates","label":"Publication dates"}},{"value":"2026-09-30","name":"date_accepted","label":"Date Accepted","group":{"name":"publication_dates","label":"Publication dates"}},{"value":"2026-10-12","name":"date_epub","label":"Online publication date","group":{"name":"publication_dates","label":"Publication dates"}}]}}