Red-emitting CaSc2O4:Eu3+ phosphor for NUV-based warm white LEDs: structural elucidation and Hirshfeld surface analysis
Naghma Shaishta
Department of Studies, Research in Chemistry Gulbarga University, Gulbarga, India
Search for more papers by this authorWaheed Ullah Khan
School of Physical Science and Technology, Lanzhou University, Lanzhou, China
Search for more papers by this authorCorresponding Author
Sunil Kumar Baburao Mane
School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou, China
School of Chemistry, Sun Yat-sen University, Guanzhou, China
Correspondence
Sunil Kumar Baburao Mane, School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou 510006, P. R. China.
Email: [email protected]
Asif Hayat, College of Chemistry, Fuzhou University, Fuzhou 350002, China.
Email: [email protected]
G. Manjunatha, Department of Chemistry, Sri Siddhartha Institute of Technology, Tumkur-572105, Kranataka, India.
Email: [email protected]
Search for more papers by this authorCorresponding Author
Asif Hayat
College of Chemistry, Fuzhou University, Fuzhou, China
Correspondence
Sunil Kumar Baburao Mane, School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou 510006, P. R. China.
Email: [email protected]
Asif Hayat, College of Chemistry, Fuzhou University, Fuzhou 350002, China.
Email: [email protected]
G. Manjunatha, Department of Chemistry, Sri Siddhartha Institute of Technology, Tumkur-572105, Kranataka, India.
Email: [email protected]
Search for more papers by this authorDong-Dong Zhou
School of Chemistry, Sun Yat-sen University, Guanzhou, China
Search for more papers by this authorJavid Khan
School of Chemistry, Sun Yat-sen University, Guanzhou, China
Search for more papers by this authorNasir Mehmood
Fujian provincial Key Laboratory of Plant Functional Biology, College of Horticulture Fujian, Agricultural and Forestry University, Fuzhou, China
Search for more papers by this authorHajeebaba K Inamdar
Department of Studies, Research in Chemistry Gulbarga University, Gulbarga, India
Search for more papers by this authorCorresponding Author
G. Manjunatha
Department of Chemistry, Sri Siddhartha Institute of Technology, Tumkur, India
Correspondence
Sunil Kumar Baburao Mane, School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou 510006, P. R. China.
Email: [email protected]
Asif Hayat, College of Chemistry, Fuzhou University, Fuzhou 350002, China.
Email: [email protected]
G. Manjunatha, Department of Chemistry, Sri Siddhartha Institute of Technology, Tumkur-572105, Kranataka, India.
Email: [email protected]
Search for more papers by this authorNaghma Shaishta
Department of Studies, Research in Chemistry Gulbarga University, Gulbarga, India
Search for more papers by this authorWaheed Ullah Khan
School of Physical Science and Technology, Lanzhou University, Lanzhou, China
Search for more papers by this authorCorresponding Author
Sunil Kumar Baburao Mane
School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou, China
School of Chemistry, Sun Yat-sen University, Guanzhou, China
Correspondence
Sunil Kumar Baburao Mane, School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou 510006, P. R. China.
Email: [email protected]
Asif Hayat, College of Chemistry, Fuzhou University, Fuzhou 350002, China.
Email: [email protected]
G. Manjunatha, Department of Chemistry, Sri Siddhartha Institute of Technology, Tumkur-572105, Kranataka, India.
Email: [email protected]
Search for more papers by this authorCorresponding Author
Asif Hayat
College of Chemistry, Fuzhou University, Fuzhou, China
Correspondence
Sunil Kumar Baburao Mane, School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou 510006, P. R. China.
Email: [email protected]
Asif Hayat, College of Chemistry, Fuzhou University, Fuzhou 350002, China.
Email: [email protected]
G. Manjunatha, Department of Chemistry, Sri Siddhartha Institute of Technology, Tumkur-572105, Kranataka, India.
Email: [email protected]
Search for more papers by this authorDong-Dong Zhou
School of Chemistry, Sun Yat-sen University, Guanzhou, China
Search for more papers by this authorJavid Khan
School of Chemistry, Sun Yat-sen University, Guanzhou, China
Search for more papers by this authorNasir Mehmood
Fujian provincial Key Laboratory of Plant Functional Biology, College of Horticulture Fujian, Agricultural and Forestry University, Fuzhou, China
Search for more papers by this authorHajeebaba K Inamdar
Department of Studies, Research in Chemistry Gulbarga University, Gulbarga, India
Search for more papers by this authorCorresponding Author
G. Manjunatha
Department of Chemistry, Sri Siddhartha Institute of Technology, Tumkur, India
Correspondence
Sunil Kumar Baburao Mane, School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou 510006, P. R. China.
Email: [email protected]
Asif Hayat, College of Chemistry, Fuzhou University, Fuzhou 350002, China.
Email: [email protected]
G. Manjunatha, Department of Chemistry, Sri Siddhartha Institute of Technology, Tumkur-572105, Kranataka, India.
Email: [email protected]
Search for more papers by this authorNaghma Shaishta and Waheed Ullah khan contributed equally to this study.
Funding information: University Grants Commission, Grant/Award Numbers: F-25-1/2013-14(BSR)/7-226/2009, File Number: 37-171/2009(SR)
Summary
We have prepared Eu3+ activated phosphor from the host CaSc2O4 (CSO) via high-temperature facial solid-state route and characterized by various spectral techniques. Surface morphology and composition was determined via scanning electron microscope (SEM) and X-ray energy dispersive spectroscopy (EDAX). The crystal structure refinements show the Pnam 62 space group with two active centres for Eu3+ in the prepared CSO:Eu3+ phosphor. Additionally, first time the detailed investigation of intermolecular interactions through Hirshfeld surface (HSs) analysis for the inorganic phosphor has been reported, the analysis indicates that the Sc/EuO and CaO contacts in the CSO:Eu3+crystal account for more than 60% and 26% of the total HSs area. The synthesized phosphor shows an intense red emission at 618 nm (Ex 394 nm) with a CIE coordinates of (0.633, 0.358) and measured internal quantum efficiency (IQE) was found to be 84%. Further, correlated colour temperature was estimated to be about 6049 K including colour purity of 93.04% for Eu = 0.10 and the thermal stability were established by their temperature dependent study (400 K = 92%). Therefore, the phosphor of CSO:Eu3+ exhibits a potential application for UV-based warm white LEDs and in the determination of intermolecular interactions through HSs surface analysis studies.
Supporting Information
| Filename | Description |
|---|---|
| er5376-sup-0001-supinfo.docxWord 2007 document , 6.3 MB | Figure S1. The enlarged XRD pattern with the selected diffraction peaks from 47° to 55° of CSO:xEu3+ (x = 0.01%, 0.10%, 0.20% and 0.30%). Figure S2. Hirshfeld surface mapped with (i) dnorm ranging from −0.808 Å (red) to 0.128 Å (blue), (ii) shape index, (ii) curvedness, (iv) di coloured map and (v) di coloured map (a) and 2D finger print plots with di and de ranging from 1.0 to 2.8 Å (b) for CSO. Figure S3. Promolecular density surface mapped with (i) dnorm ranging from −0.763 Å (red) to 0.351 Å (blue), (ii) shape index, (ii) curvedness, (iv) di coloured map and (v) di coloured map for CSO:0.10Eu3+. Figure S4. Bandgap of CSO and CSO:xEu3+ phosphor. Figure S5. (a) The decay time in different concentration and (b) The fitting results of CSO:0.10Eu3+. Figure S6. PL excitation and emission spectra of the CSO:0.10Eu3+ phosphor and reference sample [Inset illustrates the emission spectra in the wavelength range of 550-750 nm]. Table S1. Detailed crystallite size, interplanar distance and FWMH of the CSO:0.10Eu3+phosphor. Table S2. Lattice parameter and atom position of CSO:0.10Eu3+ phosphor. Table S3. Some selected bond angles of CSO:0.10Eu3+ phosphor. Table S4. Some selected bond length of CSO and CSO:0.10Eu3+ phosphor. Table S5. Some selected bond distance of CSO:0.10Eu3+ phosphor. Table S6. Various parameters data calculation on the Hirshfeld surface of CSO and CSO:0.10Eu3+. Table S7. Quantitative EDX analysis data of CSO:0.10Eu3+ phosphor [Calcinated at 1500 ° C for 8 hours]. Table S8. Colour purity with colour coordinates and CCT premeditated from PL spectra (Ex, 394 nm) for CSO:xEu3+. |
Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.
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