Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Articles Article Faculty Publications -Articles Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Extrinsic electronic states to tune the luminescence and bonding nature of Cs2NaInCl6 double perovskite Subject The topic of the resource Double perovskites; Electron density analysis; Red phosphors; Transition metals doped phosphors Description An account of the resource Halide double perovskites have been extensively investigated in recent years as more stable and environmentally friendly materials with significant optoelectronic properties. Herein, we introduce Mn2+ ions in the Cs2NaInCl6 lattice to impart new electronic pathways to the otherwise weak optically active double perovskite for tuning its luminescent behaviour. X-ray diffraction, Raman, UVvisible, Photoluminescence (PL), and timeresolved PL (TRPL) spectroscopy are used to investigate the effect of Mn 2+ feed ratio on structural, vibrational, and optical properties. The chemical environment and surface morphology of the Mn2+ ions doped Cs2NaInCl6 double perovskite were investigated using X-ray photoelectron (XPS), energy dispersive X-ray (EDS) spectroscopies, and scanning electron microscopy. Results of the Rietveld refinement and Raman spectra divulge a decrease in In-Cl and Na-Cl bond length upon Mn2+ incorporation. The microstructure of the Cs2NaInCl6 double perovskite system was also studied using HRTEM analysis. UVvisible studies demonstrated a tremendous increase in absorption and a slight increase in band gap upon Mn2+ doping. PL and TRPL measurements of Mn2+: Cs2NaInCl6 discloses its red luminescence at 614 nm corresponding to the d-d atomic transition of Mn2+ with a long lifetime of 2.1 ms. Electron density investigations using maximum entropy method (MEM) demonstrate clear evolution of In-Cl and Na-Cl bonds from a highly ionic nature in pure Cs2NaInCl6 to strong covalent nature in Mn2+: Cs2NaInCl6 double perovskites. This affirms the simultaneous replacement of In, Na ions by Mn2+ to maintain charge neutrality in the compound and tune the electronic states of the Cs2NaInCl6 system. 2023 Elsevier B.V. Creator An entity primarily responsible for making the resource Jeevaraj M.; Sivaganesh D.; Saravanakumar S.; Bahadur S.A.; Sudhahar S.; Kumar M.K. Source A related resource from which the described resource is derived Materials Chemistry and Physics, Vol-311 Publisher An entity responsible for making the resource available Elsevier Ltd Date A point or period of time associated with an event in the lifecycle of the resource 2024-01-01 Identifier An unambiguous reference to the resource within a given context <a href="https://doi.org/10.1016/j.matchemphys.2023.128569" target="_blank" rel="noreferrer noopener">https://doi.org/10.1016/j.matchemphys.2023.128569</a> <br /><br /><a href="https://www.scopus.com/inward/record.uri?eid=2-s2.0-85174580187&amp;doi=10.1016%2Fj.matchemphys.2023.128569&amp;partnerID=40&amp;md5=9dca240b7c5df73a105c6a4310052539" target="_blank" rel="noreferrer noopener">https://www.scopus.com/inward/record.uri?eid=2-s2.0-85174580187&amp;doi=10.1016%2fj.matchemphys.2023.128569&amp;partnerID=40&amp;md5=9dca240b7c5df73a105c6a4310052539</a> Rights Information about rights held in and over the resource Restricted Access Relation A related resource ISSN: 2540584; CODEN: MCHPD Format The file format, physical medium, or dimensions of the resource Online Language A language of the resource English Type The nature or genre of the resource Article Coverage The spatial or temporal topic of the resource, the spatial applicability of the resource, or the jurisdiction under which the resource is relevant Jeevaraj M., Department of Physics, Kalasalingam Academy of Research and Education (Deemed to Be University), Krishnan Koil, Tamil Nadu, 626 126, India; Sivaganesh D., Department of Physical Techniques and Devices for Quality Control Ural Federal University, Ekaterinburg, 620 002, Russian Federation; Saravanakumar S., Department of Physics, Kalasalingam Academy of Research and Education (Deemed to Be University), Krishnan Koil, Tamil Nadu, 626 126, India; Bahadur S.A., Department of Physics, Kalasalingam Academy of Research and Education (Deemed to Be University), Krishnan Koil, Tamil Nadu, 626 126, India; Sudhahar S., Department of Physics, Alagappa University, Tamil Nadu, Karaikudi, 630 003, India; Kumar M.K., Department of Physics and Electronics, CHRIST (Deemed to Be University), Karnataka, Bengaluru, 560 029, India