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A promising candidate of white light-emitting (Ca2MgSi2O7: Dy3+) phosphor was successfully synthesized via traditional high-temperature solid-state synthesis technique using boric acid (H3BO3) as a fuel. The synthesized material sample was characterized with the help of powder X-ray diffraction (PXRD), FT-IR (Fourier Transform Infra-red) Spectroscopy, FESEM (Field Emission Scanning Electron Microscopy) and PL (Photoluminescence) spectra. Using the Debye-Scherer formula and UDM method, the crystallite size and crystal lattice strain were evaluated, respectively. Photoluminescence (PL) properties (both excitation & emission spectra) for the prepared phosphor were systematically investigated in detail. Photoluminescence spectra were revealed that the strong transition of spectral emission lines centered at 484nm (blue), 578nm (yellow) and weak transition of spectral emission lines centered at 615nm (red) wavelength. These peaks were assigned to following transitions (4F9/26H15/2,13/2,11/2), which are responsible for the (f→f)  transitions from the ground  level (lower energy state) to excited level (higher energy state) in the 4f9electronic configuration of dopant [Dy3+] ions. CIE color chromaticity coordinates and Color Correlated Temperature (CCT) of synthesized Ca2MgSi2O7: Dy3+ phosphor sample is well suited for the generation of cold white light emission with a CIE coordinate value of (X = 0.31, Y = 0.32) and CCT value also calculated as 5167K. Here upon, it is highly applicable to be a novel hopeful phosphor for cold WLEDs.

Solid-state synthesis (SSS), Powder X-ray Diffraction (PXRD), Photoluminescence (PL), CIE Color Chromaticity Coordinates, Correlated Temperature (CCT), White Light Emitting Diodes (WLEDs)

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SHARMA, S., & DUBEY, S. K. (2022). IMPORTANCE OF THE COLOR TEMPERATURE IN COLD WHITE LIGHT EMISSION OF Ca2MgSi2O7: Dy3+ PHOSPHOR. Journal of Applied Chemical Science International, 13(4), 80-90. Retrieved from
Original Research Article


Razvan C, Gonze X. Ab Initio Determination of the Ground-State Properties of Ca2MgSi2O7 Åkermanite. Physical Review B. 2003; 68:184102.

Revannasiddappa GR, Basavaraj RB, Rudresha MS, Nagaraju G, Kumar S, Sasidhar N. White- light Emitting Ca2MgSi2O7:Dy3+ Nanopowders: Structural, Spectroscopic Investigations and Advanced Forensic Applications. Vacuum. 2021;184:109940.

Sharma S, Dubey SK. The Significant Properties of Silicate Luminescent Nanomaterials in Various Fields of Applications. International Journal of Scientific Research in Physics and Applied Sciences. 2021; 9:37-41.

Bhatkar VB, Bhatkar NV. Combustion Synthesis and Photoluminescence Study of Silicate Biomaterials. Indian Academy of Sciences, Bull. Mater. Sci. 2011;34:1281–1284.

Watari T, Tsuji T, Mori K, Luitel HN, Torikai T, Yada M, Xu CN, T. Terasaki T. Fabrication and Characterization of Calcium Silicate Phosphors-Ca2SiO4 and Ca2MgSi2O7. Materials Science Forum. 2013; 761:59-64.

Onani MO, Dejene FB. Photo-luminescent Properties of a Green or Red Emitting Tb3+ or Eu3+ Doped Calcium Magnesium Silicate Phosphors. Physica B: Condensed Matter. 2014; 439:137- 140.

Gong Y, Wang Y, Xu X, Li Y, Jiang Z. Enhanced Long Persistence of Ca2MgSi2O7: Eu2+ Yellow-Green Phosphors by Co-Doping with Ce3+. Journal of Electrochemical Society. 2009;156:J295.

Parlinski K, Piekarz P. Ab Initio Determination of Raman Spectra of Mg2SiO4 and Ca2MgSi2O7 Showing Mixed Modes Related to LO/TO Splitting. Journal of Raman Spectroscopy. 2021;52: 1346-1359.

JCPDS PDF File No. 17-1149, JCPDS International Center for Diffraction Data.

American Mineralogist Crystal Structure Data-Base-Code AMCSD 0008032.

Shannon RD. Crystal Physics, Diffraction, Theoretical and General Crystallography. Acta Crystallographica Section: A. 1976;32:751-767.

Jiang L, Chang C, Mao D, Feng C. Concentration Quenching of Eu2+ in Ca2MgSi2O7: Eu2+ Phosphor. Materials Science and Engineering: B. 2003; 103:271-275.

Vicentini G, Zinner LB, Zukerman-Schpector J, Zinner K. Luminescence and Structure of Europium Compounds. Coordination Chemistry Reviews. 2000; 196:353-382.

Chandrappa GT, Ghosh S, Patil KC. Synthesis and properties of Willemite, Zn2SiO4, and M2+:Zn2SiO4 (M = Co and Ni). Journal of Materials Synthesis and Processing. 1999; 7:273-279.

Salim MA, Hussain R, Abdullah MS, Abdullah S, Alias NS, Ahmad Fuzi SA. The Local Structure of Phosphor Material, Sr2MgSi2O7 and Sr2MgSi2O7:Eu2+ by Infrared Spectroscopy. Solid-State Science and Technology. 2009; 17:59-64.

Venkataravanappa M, Basavaraj RB, Darshan GP, Prasad BD, Sharma SC, Prabha PH, Nagabhushana H. Multifunctional Dy (III) doped Di-Calcium Silicate Array for Boosting Display and Forensic Applications. Journal of Rare Earths. 2018; 36:690-702.

Klug P, Alexander LE. X-ray Diffraction Procedures: For Polycrystalline and Amorphous Materials, John Wiley and Sons; 1974.

Hall WH, Williamson GK. The diffraction pattern of cold worked metals: I the nature of extinction. Proceedings of the Physical Society: Section B. 1951; 64:937.

Sharma S, Dubey SK, Diwakar AK, Pandey S. Novel White Light Emitting (Ca2MgSi2O7: Dy3+) Phosphor. Journal of Materials Science Research and Reviews. 2021; 8:164-171.

Dubey SK, Sharma S, Diwakar AK, Pandey S. Synthesization of Monoclinic (Ba2MgSi2O7: Dy3+) Structure by Combustion Route. Journal of Materials Science Research and Reviews. 2021; 8:172-179.

Reed SJB. Electron Microprobe Analysis and Scanning Electron Microscopy in Geology, Cambridge University Press; 2005.

Gou Z, Chang J, Zhai W. Preparation and Characterization of Novel Bioactive Di Calcium Silicate Ceramics [J]. Journal of the European Ceramic Society. 2005;25:1507-1514.

Chang C, Mao D. Luminescent properties of Sr2MgSi2O7 and Ca2MgSi2O7 long lasting phosphors activated by Eu2+, Dy3+. Journal of Alloy and Compounds. 2005; 390:133-137.

Lin L, Zhonghua ZHAO, Zhang W, Zheng Z, Min YIN. Photo-luminescence Properties and Thermo-Luminescence Curve Analysis of a New White Long-Lasting Phosphor: Ca2MgSi2O7: Dy3+. Journal of Rare Earths. 2009; 27:749-752.

Liu B, Kong L, Shi C. White-light Long-Lasting Phosphor Sr2MgSi2O7: Dy3+. Journal of Luminescence. 2007; 122:121-124.

Raut SK, Dhoble NS, Dhoble SJ. Combustion synthesis of Ca2MgSi2O7: Dy3+ phosphor for Solid-State Lighting. Journal of Search & Research. 2011; 2:36-39.

Sharma S, Dubey SK, Pandey S, Diwakar AK. Optical Characteristics of Novel WLED (Ca2MgSi2O7: Dy3+) Phosphor. NAIRJS, Engineering & I.T. 2021; 7:33-44.

Chen Y, Cheng X, Liu M, Qi Z, Shi C. Comparison Study of the Luminescent Properties of the White-Light Long Afterglow Phosphors: CaxMgSi2O5+x:Dy3+ (x= 1, 2, 3). Journal of Luminescence. 2009; 129:531-535.

Elizebeth A, Thomas V, Jose G, Unnikrishnan NV, Joseph C, Ittyachen MA. Studies on the Growth and Optical Characterization of Dysprosium Gadolinium Oxalate Single Crystals. Crystal Research and Technology: Journal of Experimental and Industrial Crystallography. 2004; 39:105- 110.

Tshabalala MA, Dejene FB, Pitale SS, Swart HC, Ntwaeaborwa OM. Generation of White-Light from Dy3+ doped Sr2SiO4 Phosphor. Physica B: Condensed Matter. 2014; 439:126-129.

Vishwakarma AK, Jha K, Jayasimhadri M, Sivaiah B, Gahtori B, Haranath D. Emerging Cool White Light Emission from Dy3+ Doped Single Phase Alkaline Earth Niobate Phosphors for Indoor Lighting Applications. Article Dalton Transactions. 2015; 44:17166-17174.

Singh D, Tanwar V, Simantilke AP, Mari B, Kadyan PS, Singh I. Rapid Synthesis and Photoluminescent Characterization of MAl2O4: Eu2+, Dy3+ (M = Ca/Ca+, Ba/Ba+, Mg) Blue Nano Phosphors for White Lighting Display Applications. Advanced Material Letters. 2016; 7:47-53.

Dutczak D, Milbrat A, Katelnikovas A, Meijerink A, Ronda C, Jüstel T. Yellow Persistent Luminescence of Sr2SiO4: Eu2+, Dy3+. Journal of Luminescence. 2012; 132:2398-2403.

CIE (1931). International Commission on Illumination. Publication CIE no. 15 (E-1.3.1).

McCamy C. Correlated Color Temperature as an Explicit Function of Chromaticity Coordinates. Color Res. Appl. 1992; 17:142-144.