Characteristic Emission Peaks Research Articles

Multicolour emission from thermally stable Tb3+/Eu3+ co-doped CaLa4Si3O13 phosphors for single-component w-LEDs application

Colour-tuneable Tb3+/Eu3+ co-doped CaLa4Si3O13 phosphors were prepared by a high-temperature solid-state reaction approach. The contraction of unit cell volume was concluded from the XRD Rietveld refinements data after introduction of dopants and suggests that the dopants have been effectively incorporated into the La3+ sites. Characteristic emission peaks at 545 and 617 nm originated from Tb3+ and Eu3+ emitting centres are observed under the excitation of 379 nm light. An adjustment of emission colour is achieved by varying the Eu3+ concentration. Energy transfer from Tb3+ to Eu3+ ions is experimentally confirmed from the photoluminescence and lifetime measurements. The dipole-dipole interaction is proposed as the main energy transfer route by Dexter's energy transfer formula and Inokuti-Hirayama model. The prepared phosphors exhibit good thermal stability at elevated temperatures. The results indicate that the synthesized materials have a great potential for single-component w-LED applications.

Potassium Ferrate(VI) as a Highly Efficient and Environmentally Friendly Chemiluminescence Reagent in Acidic Solution.

Herein we report that the reactions of potassium ferrate (VI) with a number of reductants can produce strong chemiluminescence (CL) in acidic aqueous solution. The CL Spectra were registered and compared with the classical KMnO4 and NaClO-H2O2 CL systems. The characteristic emission peaks at 1268 and 1050 nm were observed, which are consistent to the spectrum obtained from the NaClO-H2O2 system. Additional emission bands at 680 nm further confirmed the formation of singlet oxygen dimers. The high CL intensity and the chemically green nature of K2FeO4, prompt us to further develop it as a novel CL reagent. Sensitive response and wide calibration ranges were obtained for dopamine, ascorbic acid, and ethanol. The linear range for the determination of three analytes were 50 nM to 50 μM for dopamine (LOD: 20 nM), 5.0 μM to 1.0 mM for ascorbic acid (LOD: 2.21 μM), and 0.5 μM to 1.0 mM for ethanol (LOD: 0.30 μM). Thus, K2FeO4 has a great potential for the postcolumn detection of those UV featureless compounds.

Ultrasound induced synthesis of dual phased hierarchical ZrO2:Eu3+ architectures: Fluorescent based sensor for rapid visualization of latent fingerprints

Red emitting ZrO2:Eu3+ (1–7 mol %) nanophosphors were fabricated via ultrasonication route with Aloe Vera gel as a bio-surfactant. The sonication time engineered both the crystal structure and morphology of the prepared nanophosphor: shorter sonication time leads to the synthesis of tetragonal phase, while -longer sonication time favors the formation of cubic ZrO2 phase. A plausible growth mechanism of the architectures that implies aggregation via oriented attachment followed by an Ostwald ripening was proposed. The photoluminescence results showed the characteristic emission peaks of Eu3+ ions at ˜ 591 nm (5D0 → 7F1), 606 nm (5D0 → 7F2), 661 nm (5D0 → 7F3) and 712 nm (5D0 → 7F4). The photometric results clearly evident that the nanophosphors emit pure red color with high purity, which signify its use as a warm red component in WLEDs applications. The - powder dusting strategy was followed for the visualization of sweat latent fingerprints using optimized ZrO2:Eu3+(5 mol %) nanophosphor on many surfaces. Most essential type 1–3 ridge characteristics were clearly revealed with high sensitivity, selectivity and low background hindrance. The adopted method was simple and environment friendly for sweat fingerprint development, and promising outlook in criminal investigation and forensic science.

Synthesis, characterization and properties of lanthanide complexes with different ancillary ligands

By introducing different ancillary ligands and solvent molecules, four lanthanide complexes [Yb2(L)2(acac)2(CH3OH)2]·CH3OH·H2O (1), [Lu2(L)2(acac)2(CH3OH)2]·2CH3OH (2), [Yb2(L)2(dbm)2(CH3OH)2]·CH3OH (3), and [Lu2(L)2(dbm)2(C2H5OH)2] (4) (where H2L = 2-(hydroxyimino)-2-[(5-methyl-2-hydroxyphenyl)methylene]hydrazide, Hacac = acetylacetonate and Hdbm = 1,3-diphenyl-1,3-propanedione) have been synthesized and characterized. The X-ray structural analyses show that complexes 1 and 2 are isostructural in the Triclinic system, space group Pī, complex 3 crystallizes in Monoclinic system, space group P21/c, and complex 4 crystallizes in Orthorhombic system, space group Pbca. The metal ions in complexes 1–4 are all eight-coordinated and show a similar distorted triangular dodecahedron coordination geometry. The fluorescence properties of complexes 1–4 were also investigated. Complexes 1 and 3 showed characteristic emission peaks of Yb(III) ion, while complexes 2 and 4 exhibited emission peaks consistent with that of the ligand when they were excited at the same wavelength.

Heating promoted fluorescent recognition of Cu2+ with high selectivity and sensitivity based on spiropyran derivative

A spiropyran derivative containing an ethyl group (SPEt) was applied for fluorescent recognition of Cu2+. With Cu2+ addition, the SPEt-contained solution using a mixed solvent of DMF/H2O (9/1, v/v) showed a very strong characteristic emission peak with high quantum yield which is 4.3 times that of the pure SPEt solution. As a result, Cu2+ was successfully picked out from totally 17 kinds of common metal ions and a detection limit as low as 14.9 fM had been achieved in using this assay system. Particularly, the recognition process was temperature- and time-dependent and could be effectively promoted by heating. In addition, SPEt had been used to image and detect Cu2+ in mussels. Thus, our results in this study provided an exclusive Cu2+ recognition via fluorometry in wide temperature, time, and dynamic ranges of assay, enabled a femtomolar scale detection of Cu2+ by spiropyran derivative, and showed a promising imaging ability of Cu2+ in marine living organisms.

Structural, photoluminescent and thermoluminescent studies of rare earth ion (RE = Eu3+) doped Sr2SiO4 phosphor

Sr2SiO4 silicate doped with rare earth ion (RE = Eu3+) was synthesized by high temperature solid state reaction method. The sample was X-Ray diffraction (XRD) characterized and the analysis of XRD data conveyed that the sample to be crystalline, single phase and crystallized to orthorhombic structure (Pmnb). The structure, space group (Pmnb) and other structure concerned parameters were further verified using Rietveld refinement. The FTIR spectra confirm the formation of Sr2SiO4: Eu3+ phosphor. UV–vis studies have been carried out to investigate optical band gap of prepared phosphor. Luminescence property of Sr2SiO4; Eu3+ phosphor was studied via photoluminescence and thermoluminescence. The emission spectrum displayed characteristic emission peaks corresponding to Eu3+ at 587, 612 and 702 nm. The Commission International de I’Eclairage (CIE) color coordinates of Sr2SiO4; Eu3+ phosphor were calculated and found as x = 0.601 and y = 0.397 lying in Strong red region. Thermoluminescence (TL) response of Eu3+ doped Sr2SiO4 phosphor were studied for different dose of UV irradiation and for varying heating rate, the trap parameters viz., order of kinetics, symmetry factor, kinetic energy associated with the intense glow peak of Sr2SiO4: Eu3+ phosphor were determine using glow curve peak shape method.

Effect of Alkali Oxides on Luminescence Properties of Eu3+-doped Aluminium Phosphate Glasses

Abstract Trivalent europium doped aluminium phosphate glasses with different alkali oxides (Li2O, Na2O and K2O) have been prepared by melt quenching technique at 1200 °C. Photoluminescence properties of the obtained glasses have been studied and characterized. Also, Absorption and radiative properties of glasses are evaluated using the Judd–Ofelt (JO) theory. The emission spectra of all glasses remain the characteristic emission peak of Eu3+ with a dominant peak at 612 nm, corresponding to the 5D0 → 7F2 transition by monitoring an excitation wavelength at 393 nm. In the present glass system it was found that lithium oxide has higher intensity of emission spectra than sodium oxide and potassium oxide. The JO intensity parameters (Ω2, Ω4, Ω6) and subsequent radiative properties for the 5D0 → 7FJ (J = 1,2,3,4) transitions are determined. These glasses have potential candidate in the development as red laser source applications.

Monovalent ions co-doped SrTiO3:Pr3+ nanostructures for the visualization of latent fingerprints and can be red component for solid state devices

Structural and luminescence properties of SrTiO3: Pr3+: A+ (A+: Li, Na, K) nanophosphors were synthesized by simple sonochemical route. Prepared products were well-characterized for their optical and structural properties. Surface morphology of the prepared samples were studied with the influential parameters such as surfactant concentration, sonication time, temperature, pH and compared the effect with normal mechanical stirring. Morphology was highly dependent on the experimental parameters. The predicted growth mechanism to obtain superstructures of the samples prepared by sonochemical method was discussed. Photoluminescence (PL) studies exhibit characteristic emission peaks of Pr3+ ions in the range 500–750 nm. The highest PL intensity was obtained for 5 mol% of Pr3+ doped samples. Further, co-doping with Li+, Na+ and K+ ions into Pr3+ activated SrTiO3 phosphor led to an enhancement in luminescence intensity by reducing the parity restriction of electric dipole transitions. As a consequence of suitable local distortion of the crystal field surrounding to the Pr3+ activator ions. The maximum PL intensity was observed for Li+ (1 wt%) co-doped SrTiO3:Pr3+ (5 mol%) samples. Furthermore, Li+ ion was the best charge compensator, because of it reduced the defects emission and also increased the emission intensity of Pr3+ significantly. Prepared phosphors exhibit short lifetime, good quantum efficiency; excellent color purity which is near to the NTSC standards. Prepared fluorescent powders were used as a dusting powder for the rapid visualization of latent fingerprints under UV light of 254 nm. From the reported results it is evident that the optimized prepared samples are suitable for solid state lighting and advanced forensic investigation applications.

Oxygen vacancy-assistant enhancement of photoluminescence performance of Eu3+ and La3+-codoped BiOCl ultrathin nanosheets

The Eu3+ and La3+ co-doped BiOCl ultrathin nanosheets were prepared through a facile solvothermal method. The samples were characterized using different techniques to study the structure, morphology, and luminescence. The solvothermal derived samples exhibit the morphology of ultrathin nanosheet. The photoluminescence spectrum of the Eu3+ ions doped BiOCl sample shows a broad emission band in the wavelength range of 380–480 nm due to the oxygen vacancies present in the sample. The spectrum also shows sharp characteristic emission peaks of Eu3+ ions. The intensity of this broad emission band increases with the incorporation of La3+ ions, due to the increase in oxygen vacancies. These results were demonstrated by the XPS spectra for all the samples. It was found that the overall luminescence intensity for the BiOCl: Eu3+, La3+ ultrathin nanosheet was about 300% stronger than the BiOCl: Eu3+ ultrathin nanosheet. As the La3+ ions concentration increases the CIE values shift from bluish-white region to white.

Synthesis and luminescence properties of Eu3+ co-doped NaBi(MoO4)2:Dy3+ phosphors for white light-emitting diodes

Dy3+-doped and Dy3+/Eu3+ co-doped NaBi(MoO4)2 phosphors were successfully synthesized using a high temperature solid-state method. The crystal structure and phase purity of these as-prepared samples were characterized by X-ray diffraction. Under 453 nm excitation, NaBi(MoO4)2:Dy3+ phosphors exhibited the characteristic weak blue emission peak at 488 nm and strong yellow emission peak at 577 nm, which originate from the 4F9/2 → 6H15/2 and 4F9/2 → 6H13/2 transitions of Dy3+ ions, respectively. Therefore, a white light could be composed of a blue light from chip and yellow emission of NaBi(MoO4)2:Dy3+ phosphor. Additionally, color-tunable emissions were observed in the spectra of NaBi(MoO4)2:Dy3+, Eu3+ phosphors due to efficient energy transfer from Dy3+ to Eu3+ ions. By varying co-doping concentrations of Dy3+ and Eu3+ ions, the emission color of NaBi(MoO4)2:Dy3+, Eu3+ could be varied for high quality blue-excited white light-emitting diodes.

Synthesis and characterization of Sm3+ activated La1−xGdxPO4 phosphors for white LEDs applications

A series of orange-red light emitting Sm3+ activated La1−xGdxPO4 (0.00 ≤ × ≤ 1.00) phosphors were synthesized by the solid-state method. The structural parameters were confirmed by the Rietveld refinement method based on powder X-Ray diffraction (XRD) analysis. All the compounds crystallized in the monazite monoclinic structure with space group P 1 21/n 1 (no. 14). The photoluminescence spectra of La0.95−xGdxPO4:Sm3+ phosphors were measured at the excitation wavelength of 400 nm, exhibited characteristic emission peaks for Sm3+ at 560, 597, and 643 nm. The purely magnetic dipole allowed transition (4G5/2 → 6H5/2) at 560 nm and partly magnetic dipole transition (4G5/2 → 6H7/2) at 597 nm, responsible for orange-red light, dominated the emission spectra. In contrast to the magnetic dipole transitions, the electric dipole transition (4G5/2 → 6H9/2) was found to be relatively less intense confirming high symmetrical crystal environment around Sm3+ in the host lattice. However, with subsequent substitution of Gd3+ at the lanthanide site in the host lattice, the crystal field suffered distortion and thus, influenced the photometric properties. From experimental results, it was evident that these phosphors have suitable Commission International de l’Eclairage (CIE), color correlated temperature (CCT) parameters, appreciable lifetime, and excellent color purity with respect to other reported rare earth ion doped orange-red phosphors. Further, these results could help in the improvisation of their use in optoelectronics especially white LEDs, photovoltaic cells and other strategic applications.

Morphological and photoluminescence study of NaSrB5O9: Tb3+ nanocrystalline phosphor

ABSTRACTNanocrystalline green-emitting phosphor NaSrB5O9: Tb3+ was synthesized by a facile and time-efficient modified combustion method. The phosphor was characterized by powder X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, nanoparticle tracking analysis (NTA), field emission scanning electron microscopy (FESEM) and photoluminescence excitation (PLE) and emission (PL) spectroscopy. XRD revealed the proper phase formation. Williamson–Hall (W-H) analysis gave the crystallite sizes and lattice strain due to peak broadening. A nanoplate-like morphology was observed in the FESEM analysis. Upon excitation by 217 nm UV light, the phosphor showed characteristic green emission peaks at 487 nm, 543 nm, 596 nm and 622 nm corresponding to the 5D4→7F6, 5D4→7F5, 5D4→7F4 and 5D4→7F3 transitions, respectively. A concentration quenching effect was observed and the critical concentration was found to be 3 mol % of Terbium.

Effect of Tb Doping on Structural and Optical Properties of (Cd0.8-Zn0.2)S Films Deposited Through a Chemical Route

Tb-doped (Cd0.8-Zn0.2)S films have been prepared on glass substrates at 60°C by a chemical bath deposition technique. The effect of variation in the molar concentration of terbium (Tb) on the optical properties of the deposited films has been investigated and is discussed. The films have been characterized through x-ray diffraction (XRD), scanning electron microscopy (SEM), UV–Vis absorption and photoluminescence (PL) emission spectral studies. Prominent diffraction lines of CdS and ZnS with maximum orientation towards (111)c plane of CdS are observed in XRD patterns. Particle sizes calculated from XRD studies using Scherrer’s formula are found to be in the nano-range. The SEM micrographs of bulk film showed a layered structure, while a honey-comb structure with thickness of layers in the nano-range is seen for the deposited films. From the optical absorption spectra, a blue shift in the absorption edge is distinctly observed in the nanocrystalline films as compared to bulk film, suggesting the involvement of a quantum confinement effect. PL emission spectra showed distinct emission peaks for bulk and nanocrystalline films. PL emissions due to transitions within Tb3+ levels are also observed. The characteristic green emission peak due to 5D4-7F2 transition in Tb at 620 nm is observed in all three cases. Various studies suggest that the deposited films have potential applications in photo-electronic devices.

Eu2+→Eu3+ reduction and Tb3+→Tb4+ transformation in SrAl2Si2O8:Eu/Tb system

The existing valence state (Eu2+/Eu3+ and Tb3+/Tb4+) in Eu/Tb ions doped in SrAl2Si2O8 were investigated through experimental and theoretical method. Their photoluminescence properties indicated that parts of Eu3+ ions were reduced to Eu2+ in SrAl2Si2O8. Based on the bond energy method, the reduction process of the Eu3+→Eu2+ and the preferentially occupancy of Eu3+/Eu2+ in SrAl2Si2O8 samples have been discussed. The values of deviation of its bond energy were calculated when Eu ions located at different crystal sites. Theoretical results indicated that the Eu3+ and Eu2+ would preferentially occupy the Sr sites due to the smaller energy variation. In addition, the variation of bond energy of Eu3+(ΔEEu3+-O2-Sr=11.367 kcal/mol) is close to Eu2+ (ΔEEu2+-O2-Sr= 15.112 kcal/mol), which indicated that the both of Eu2+ and Eu3+can stably exist in SrAl2Si2O8 host. When Eu, Tb ions are co-doped in SrAl2Si2O8, the photoluminescence shows that only the characteristic emission peaks of Eu2+ and Eu3+ can be found and the emission of Tb3+ disappeared. It is suggested that the Tb3+ is oxidized to Tb4+ and the Eu3+ is reduced to Eu2+. Compared with Eu ion, the variation of bond energy for Tb3+(ΔETb3+-O2-Sr=10.084 kcal/mol) is more closer to Tb4+ (ΔETb4+-O2-Sr=9.628 kcal/mol), so in Tb3+, Eu3+ co-doped in SrAl2Si2O8, the Tb4+ ion has the highest priority to occupy the Sr sites, Tb3+ loses one electron to form the tetravalent Tb4+, and the excess electrons are transferred to the surrounding neighboring Eu3+ site, Eu3+ gets an electron and is reduced to Eu2+. The theoretical results are in accord with the experimental measurement.

Optical properties of trivalent samarium-doped Ba5Zn4Y8O21 nanodiametric rods excitable by NUV light

A series of reddish-orange Ba5Zn4Y8-xO21:xSm3+ (x = 0.04–0.24) nanophosphors were synthesized via urea-assisted solution combustion method and characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), diffuse reflectance (DR) and photoluminescence (PL) spectroscopy. Rietveld analysis infers that Y3+ ions can be well-substituted by Sm3+ ions without any major alteration in the crystal structure of host matrix. Moreover, as no JCPDS data was available for the host, the lattice parameters and refined atomic positions were determined for both, the host as well as the doped sample. TEM investigation revealed the nanodiametric rods of almost smoothly-surfaced morphological character. The optical band-gap of the host (5.36 eV) was calculated from DR spectra and also performed theoretically in density functional theory (DFT) framework using CASTEP code. On NUV excitation, the nanophosphor exhibits the characteristic emission peaks of Sm3+, which can be credited to 4G5/2→6HJ (J = 5/2, 7/2, 9/2, 11/2) transitions. The optimum Sm3+ concentration for better luminescence was found to be 1.5 mol%. The critical distance (20.49 Å) elicits the right mechanism responsible for concentration quenching (dipole-dipole). The detailed analysis of PL decay curves gave the radiative lifetime (1.11 ms), overall rate of non-radiative relaxation (240.16 s−1) and most importantly, the quantum efficiency of 4G5/2 electronic state (78%). The CIE color coordinates unveiled an almost pure reddish-orange emitter, which finds potential applications in phosphor-converted white light emitting diodes (PC-WLEDs) under NUV excitation.

Porous boron nitride/rare earth complex hybrids with multicolor tunable photoluminescence

A series of organic-inorganic hybrid materials BN-T1Ex (T = Tb(BA)3, E = Eu(BA)3) have been synthesized through controllable encapsulation of Tb and Eu complexes into a porous BN host. Under ultraviolet (UV) light excitation, the as-prepared BN-T1Ex samples show characteristic emission peaks of both Tb3+ and Eu3+ ions. The photoluminescence (PL) excitation and emission spectra and fluorescence lifetimes have been measured and discussed in detail. The results reveal that in the BN host, efficient energy transfer from Tb3+ to Eu3+ ions has occurred. By adjusting the ratios of Tb and Eu complexes, the hybrids realize tunable multicolor from green to red. In addition, the emission color of the hybrids can be further changed by adjusting the excitation wavelength and/or introducing of ancillary ligand phen (1,10-phenanthroline) into the samples. The obtained color-tunable organic-inorganic hybrid materials may have potential application in display devices and the UV white-light-emitting diodes (w-LEDs).

Development of Eu3+ doped Li2O-BaO-GdF3-SiO2 oxyfluoride glass for efficient energy transfer from Gd3+ to Eu3+ in red emission solid state device application

The Eu3+- doped Li2O-BaO-GdF3-SiO2 glasses were fabricated by conventional melt quenching technique to study its spectroscopic and luminescence properties for lasing potential. The density and molar volume of the glass had been increased with Eu2O3 concentration. An FTIR spectrum is used to study the structural properties of the developed glasses. Two intense peaks were observed in UV–Vis–NIR spectra at 2206 nm (7F6) and 2085 nm (7F1) in NIR region. Under 394 nm excitation LBGFS display five regular emission peaks at (578 nm) 7F0, (590 nm) 7F1, (613 nm) 7F2, (651 nm) 7F3 and (701 nm) 7F4 from 5D0 state, the most intense red emission was found at 613 nm. The characteristic intense red emission peak at 613 nm corresponding to the 5D0 →7F2 transition of Eu3+ ions has been observed for oxy-fluoride glass samples. Efficient energy transfer phenomena from Gd3+ → Eu3+ were observed under 275 nm excitation in these glasses. FTIR measurements reveal that these glasses show non-bridging oxygen stretching of Si-O- at ~929 cm−1. Phonon sideband spectrum confirms the phonon energy ~920 cm−1 for these glasses arising from Si-O-. Increasing trend of IR/O with increasing concentration of Eu2O3 indicates the asymmetric environment around Eu3+ in LBGFS. Higher value of stimulated cross section (σ(λp)) branching ratio (βR) for transition to 7F0 from 5D0 were observed for LBGFS glasses. Decay time decrease with increasing concentration of Eu2O3.

Preparation and Luminescence Properties of Ba3Y(PO4)3:RE3+ (RE=Eu, Dy) Phosphors

In order to investigate the luminescence properties of Ba3Y(PO4)3 doped with rare earth ions, a series of Eu3+ and Dy3+ single doped Ba3Y(PO4)3 phosphor powders were prepared by high temperature solid phase method. The relevant performance of samples were characterized by X ray diffraction (XRD) and fluorescence spectra. The results showed that the prepared phosphor was a cubic phase of bismuth ore and the space group is I-43d. Under the excitation of near violet light, the narrow band emission of Ba3Y(PO4)3:0.08Eu3+ was nearly located at 594nm, 613nm and 702nm, which showed orange red light emission. The Ba3Y(PO4)3:0.08Dy3+ narrow band emission was located at 485nm and 575nm respectively, which showed white light emission. The matrix material was doped with a single active ion, and the white light emission was achieved through its coordination in different light regions. The characteristic emission peak of Eu3+ in the red light region (580∼650nm, 5D0-7FJ) could compensate for the lack of red components in the Dy3+ white light emission spectrum, thus the quality of white light of the single doped Dy3+phosphor could be improved, and it was expected to be applied to light-emitting diode (LED) field.

Green electroluminescence from Tb2O3/polymer heterojunction light-emitting diodes

In this work, heterojunction light-emitting diodes made of Tb2O3 and poly(3,4-ethylene-dioxythiophene)–poly(styrene-sulfonate) (PEDOT:PSS) were prepared and the effect of PEDOT:PSS films on performance of the electroluminescence devices was studied. PEDOT:PSS films about 0, 50, 80, 120 and 150 nm were deposited on the 160 nm Tb2O3 film. Crystal structures, morphologies and electroluminescence properties of the devices were characterized, and the electroluminescence mechanism was analyzed. The turn-on voltages of the devices are almost the same under a forward bias. Four characteristic emission peaks of Tb3+ at 488, 544, 584 and 618 nm are observed from electroluminescence spectra of all the devices. The current decreases with increasing the thickness of the PEDOT:PSS film. However, the electroluminescence intensity first increases and then decreases under this condition. The electroluminescence intensity is up to 3.2 times higher than that of the pristine LED after spin-coating the PEDOT:PSS film. The optimum thickness of the PEDOT:PSS film is about 80 nm.

Correlated PL, TL and EPR study in γ-rays and C6+ ion beam irradiated CaMg2(SO4)3:Dy3+ triple sulphate phosphor

CaMg2(SO4)3 host and CaMg2(SO4)3:Dy3+ phosphor (where Dy3+ = 0.05, 0.1,0.2, 0.5 and 1 mol%) were synthesized via solid state synthesis method at 700 °C. Phase formation of the compound was confirmed by obtaining its X-ray diffraction (XRD) pattern and the surface morphology was analyzed with the scanning electron microscopy (SEM) technique. Photoluminescence (PL) excitation and emission spectra of CaMg2(SO4)3:Dy3+ phosphor shows characteristic emission and excitation peaks of Dy3+ ions, which confirms the doping of Dy3+ ions in the host. Material was irradiated with γ-rays and C6+ ion beam. Thermoluminescence (TL) glow curve of irradiated material was recorded at the heating rate of 5 °C s−1. A single TL peak is obtained after γ-rays irradiation for CaMg2(SO4)3 host at 158 °C and two TL peaks were seen for CaMg2(SO4)3:Dy3+ at 129 °C and 355 °C. With increase in Dy3+ concentration, TL intensity is increased but the nature of TL glow curve remained same. Material was quenched from 400 °C and its TL was recorded by irradiating it with γ-rays and C6+ ion beam (75 MeV). TL intensity of quenched CaMg2(SO4)3:Dy3+ compound enhanced significantly as compared to annealed CaMg2(SO4)3:Dy3+ compound. Electron paramagnetic resonance (EPR) study was carried out on irradiated (γ-ray and C6+ beam) CaMg2(SO4)3:Dy3+ compound to analyse radicles formed in the irradiation process and possible mechanism of TL. Correlated study of TL, PL and EPR is done.