Extrinsic electronic states to tune the luminescence and bonding nature of Cs2NaInCl6 double perovskite
- Title
- Extrinsic electronic states to tune the luminescence and bonding nature of Cs2NaInCl6 double perovskite
- Creator
- Jeevaraj M.; Sivaganesh D.; Saravanakumar S.; Bahadur S.A.; Sudhahar S.; Kumar M.K.
- Description
- 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.
- Source
- Materials Chemistry and Physics, Vol-311
- Date
- 2024-01-01
- Publisher
- Elsevier Ltd
- Subject
- Double perovskites; Electron density analysis; Red phosphors; Transition metals doped phosphors
- Coverage
- 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
- Rights
- Restricted Access
- Relation
- ISSN: 2540584; CODEN: MCHPD
- Format
- Online
- Language
- English
- Type
- Article
Collection
Citation
Jeevaraj M.; Sivaganesh D.; Saravanakumar S.; Bahadur S.A.; Sudhahar S.; Kumar M.K., “Extrinsic electronic states to tune the luminescence and bonding nature of Cs2NaInCl6 double perovskite,” CHRIST (Deemed To Be University) Institutional Repository, accessed February 24, 2025, https://archives.christuniversity.in/items/show/13779.