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However, such a pc\u2010LED emitting ultrabroad near\u2010infrared (NIR) radiations still remains a challenge, primarily because of the lack of ultrabroad NIR emitting phosphors. To address this issue, we have prepared 2.5\u2009% W\n                    <jats:sup>4+<\/jats:sup>\n                    \u2010doped and 2.8\u2009% Mo\n                    <jats:sup>4+<\/jats:sup>\n                    \u2010doped Cs\n                    <jats:sub>2<\/jats:sub>\n                    Na\n                    <jats:sub>0.95<\/jats:sub>\n                    Ag\n                    <jats:sub>0.05<\/jats:sub>\n                    BiCl\n                    <jats:sub>6<\/jats:sub>\n                    perovskites emitting ultrabroad NIR radiation with unprecedented spectral widths of 434 and 468\u2005nm, respectively. Upon band\u2010edge excitation, the soft lattice of the host exhibits broad self\u2010trapped exciton (STE) emission covering NIR\u2010I (700\u2005nm), which then nonradiatively excites the dopants. The \n\u2013donor ligand Cl\n                    <jats:sup>\u2212<\/jats:sup>\n                    reduces the energy of dopant\n                    <jats:italic>d\u2013d<\/jats:italic>\n                    transitions emitting NIR\u2010II with a peak at ~950\u2005nm. Vibronic coupling broadens the dopant emission. The large spin\u2010orbit coupling and local structural distortion might possibly enhance the dopant emission intensity, leading to an overall NIR photoluminescence quantum yield ~40\u2009%. The composite of our ultrabroad NIR phosphors with biodegradable polymer polylactic acid could be processed into free\u2010standing films and 3D printed structures. Large (170\n170\u2005\n), robust, and thermally stable 3D printed pc\u2010LED panels emit ultrabroad NIR radiation, demonstrating NIR imaging applications.\n                  <\/jats:p>","DOI":"10.1002\/anie.202415003","type":"journal-article","created":{"date-parts":[[2024,9,20]],"date-time":"2024-09-20T06:30:55Z","timestamp":1726813855000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":46,"title":["Ultrabroad Near Infrared Emitting Perovskites"],"prefix":"10.1002","volume":"64","author":[{"given":"Sajid","family":"Saikia","sequence":"first","affiliation":[{"name":"Department of Chemistry Indian Institute of Science Education and Research (IISER)  Pune 411008 India"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Animesh","family":"Gopal","sequence":"additional","affiliation":[{"name":"Polymer Science and Engineering Division CSIR-National Chemical Laboratory (CSIR-NCL)  Pune 411008 India"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Radha","family":"Rathod","sequence":"additional","affiliation":[{"name":"Centre for Nano and Soft Matter Sciences (CeNS)  Bengaluru 562162 India"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Aprajita","family":"Joshi","sequence":"additional","affiliation":[{"name":"Department of Physics Indian Institute of Science Education and Research  Bhopal 462066 India"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8238-552X","authenticated-orcid":false,"given":"K. 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