Constructing Concentration and Temperature Controllable Blue-Green Emission in a Single-Component Solid-State Phosphor

2021 ◽  
Author(s):  
Diming Xu ◽  
Pingping Wen ◽  
Jingsong Gao ◽  
Junliang Sun
Keyword(s):  
Solid State ◽  
Green Emission ◽  
Single Component

scholarly journals Polymer Thermal Treatment Production of Cerium Doped Willemite Nanoparticles: An Analysis of Structure, Energy Band Gap and Luminescence Properties

Materials ◽  
2021 ◽  
Vol 14 (5) ◽  
pp. 1118
Author(s):  
Ibrahim Mustapha Alibe ◽  
Khamirul Amin Matori ◽  
Mohd Hafiz Mohd Zaid ◽  
Salisu Nasir ◽  
Ali Mustapha Alibe ◽  
...  
Keyword(s):  
Solid State ◽  
Thermal Treatment ◽  
Band Gap ◽  
Optical Band Gap ◽  
Dopant Concentration ◽  
Blue Emission ◽  
Green Emission ◽  
Band Gap Energy ◽  
Solid State Lighting ◽  
Gap Energy

The contemporary market needs for enhanced solid–state lighting devices has led to an increased demand for the production of willemite based phosphors using low-cost techniques. In this study, Ce3+ doped willemite nanoparticles were fabricated using polymer thermal treatment method. The special effects of the calcination temperatures and the dopant concentration on the structural and optical properties of the material were thoroughly studied. The XRD analysis of the samples treated at 900 °C revealed the development and or materialization of the willemite phase. The increase in the dopant concentration causes an expansion of the lattice owing to the replacement of larger Ce3+ ions for smaller Zn2+ ions. Based on the FESEM and TEM micrographs, the nanoparticles size increases with the increase in the cerium ions. The mean particles sizes were estimated to be 23.61 nm at 1 mol% to 34.02 nm at 5 mol% of the cerium dopant. The optical band gap energy of the doped samples formed at 900 °C decreased precisely by 0.21 eV (i.e., 5.21 to 5.00 eV). The PL analysis of the doped samples exhibits a strong emission at 400 nm which is ascribed to the transition of an electron from localized Ce2f state to the valence band of O2p. The energy level of the Ce3+ ions affects the willemite crystal lattice, thus causing a decrease in the intensity of the green emission at 530 nm and the blue emission at 485 nm. The wide optical band gap energy of the willemite produced is expected to pave the way for exciting innovations in solid–state lighting applications.

Single-component small-molecule white light organic phosphors

2017 ◽  
Vol 53 (66) ◽  
pp. 9269-9272 ◽  
Author(s):  
Ning-Ning Zhang ◽  
Cai Sun ◽  
Xiao-Ming Jiang ◽  
Xiu-Shuang Xing ◽  
Yong Yan ◽  
...  
Keyword(s):  
Solid State ◽  
Small Molecule ◽  
White Light ◽  
Light Emission ◽  
White Light Emission ◽  
Single Component ◽  
Supramolecular Aggregate ◽  
Organic Phosphors

A family of two small and easily synthesizable 1,2,3-triazole molecules with intrinsic white-light-emission in the solid state has been reported. The white light is assigned to the supramolecular aggregate emission (SAE) that is unusual for single-component white light phosphors.

PREPARATION AND LUMINESCENCE PROPERTIES OF Eu2+-ACTIVATED Ba-Six-O-N PHOSPHORS

2010 ◽  
Vol 24 (15n16) ◽  
pp. 3221-3225 ◽  
Author(s):  
RUILI ZHANG ◽  
MANAKA NUMATA ◽  
TOMONORI MAEDA ◽  
YUJI AKAZAWA ◽  
KEI-ICHIRO MURAI ◽  
...  
Keyword(s):  
Solid State ◽  
Solid State Reaction ◽  
Emission Intensity ◽  
Visible Region ◽  
Wavelength Region ◽  
Green Emission ◽  
Main Phase ◽  
Luminescence Properties ◽  
White Led

A series of oxonitridosilicates phosphors Ba - Si x - O - N / Eu 2+ ( x = Si / Ba =1~8, 5atom% Eu 2+) were synthesized using traditional solid-state reaction. For x = 2~8, the main phase of the obtained samples was Ba 3 Si 6 O 12 N 2. All Ba - Si x - O - N / Eu 2+( x = 1~8) materials could be efficiently excited in the UV to visible region(310~450 nm ) and had a green emission at 508~522 nm , making them attractive as conversion phosphors for white LED applications. With increasing x values, the emission peaks shifted to the longer wavelength region, while the emission intensity had a maximum at x = 6. The influence of the firing times was also discussed, after twice fired, there was a tendency of single-phased formed of the obtained materials and the emission intensity was greatly improved.

Synergy in the energy transfer between ligands and EuIII ions in molecular europium complexes: single-component white light-emitting luminogens

2020 ◽  
Vol 8 (25) ◽  
pp. 8643-8653 ◽  
Author(s):  
Rachna Devi ◽  
Kasturi Singh ◽  
Sivakumar Vaidyanathan
Keyword(s):  
Energy Transfer ◽  
Solid State ◽  
White Light ◽  
Lanthanide Complexes ◽  
Solution Process ◽  
Single Component ◽  
Solid State Lighting ◽  
Structural Flexibility ◽  
Europium Complexes ◽  
Light Emitting

Due to their structural flexibility and easy solution process capability, single-component white light-emitting pure organo-lanthanide complexes have been considered as promising candidates for solid-state lighting.

Photo-facilitated aggregation and correlated color temperature adjustment of single component organic solid state white-light emitting materials

2015 ◽  
Vol 3 (17) ◽  
pp. 4563-4569 ◽  
Author(s):  
Cheng Chen ◽  
Xu-Hui Jin ◽  
Xue-Jun Zhou ◽  
Li-Xuan Cai ◽  
Ya-Jun Zhang ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Solid State ◽  
White Light ◽  
Light Emission ◽  
White Light Emission ◽  
Single Component ◽  
Color Temperature ◽  
Dual Emission ◽  
Light Emitting ◽  
Organic Solid

A pyridinium derivative with photo-facilitated aggregation and intra-/intermolecular charge transfer synergy-induced dual emission has been presented. The correlated color temperature tunable white-light emission can be realized in different states.

Efficient spectrally dynamic blue-to-green emission of bipyridine-based bridged silsesquioxanes for solid-state lighting

2010 ◽  
Vol 4 (3-4) ◽  
pp. 55-57 ◽  
Author(s):  
Sónia S. Nobre ◽  
Xavier Cattoën ◽  
Rute A. S. Ferreira ◽  
Michel Wong Chi Man ◽  
Luis D. Carlos
Keyword(s):  
Solid State ◽  
Green Emission ◽  
Solid State Lighting ◽  
Bridged Silsesquioxanes

scholarly journals Study Study on photoluminescence properties of porous GaP material

2018 ◽  
Vol 34 (1) ◽  
Author(s):  
Pham Thi Thuy ◽  
Bui Xuan Vuong
Keyword(s):  
Solid State ◽  
Electrochemical Etching ◽  
Green Emission ◽  
Functional Materials ◽  
Bulk Sample ◽  
Electrochemical Anodization ◽  
Photoluminescence Intensity ◽  
Temperature Dependent ◽  
Time Resolved ◽  
Time Resolved Photoluminescence

This paper reports on the photoluminescence of porous GaPprepared by electrochemical anodization of (111)-oriented bulk material.Porous and bulk GaP exhibits green and red photoluminescence, respectively when excited by the 355-nm laser. The photoluminescence intensity of porous GaP is much stronger than that of the bulk sample. Temperature-dependent time-resolved photoluminescence shows that the green emission gradually decreases when the temperature increases and the photoluminescence full width at haft maximum (FWHM) slightly narrow with decreasing temperature. These results assigned to the contribution of lattice vibrations. Raman scattering measurement is carried out to confirm the size decreasing of the porous GaP material. Keywords PorousGaP, photoluminescence, time-resolved photoluminescence, electrochemical etching References 1. L. T. Canham, Appl. Phys.Lett. 57, 1046 (1990).2. K. Grigoras, Jpn. J. Appl. Phys. 39, 378 (2000)3. H. Koyama, J. Appl. Electrochem. 36, 999 (2006)4. H. A. Hadi, International Letters of Chemistry, Physics and Astronomy, 17(2), 142-152 (2014).5. S. Setzu, P. Ferrand, and R. Romestain, Mater.Sci. Eng, 34, 69-70 (2000).6. S. E. Letant and M. J. Sailor, Adv. Mater, 355, 12 (2000).7. M. T. Kelly, J. K. M. Chun, and A. B. Bocarsly, Nature, 382, 214 (1996).8. G. Di Francia, V. La Ferrara, L. Quercia, and G. Faglia, J. Porous Mater, 7, 287 (2000).9. J. Drott, K. Lindstrom, L. Rosengren, and T. Laurell, J. Micromech. Microeng, 7, 14 (1997).10. B. P. Azeredo, Y. W. Lin, A. Avagyan, M. Sivaguru, K. Hsu, P. Ferreira, Advanced Functional Materials, 26, 2929-2939 (2016).11. A. Anedda, A. Serpi, V. A. Karavanskii, I. M. Tiginyanu, and V. M. Ichizli, Appl. Phys.Lett, 67, 3316 (1995).12. A. I. Belogorokhov, V. A. Karavanskii, A. N. Obraztsov and V. Yu. Timoshenko, JETP Lett. 60, 274 (1994).13. K. Tomioka, S. Adachi, J. App. Phys, 98, 073511 (2005).14. M. A. Stevens-Kalceff, I. M. Tiginyanu, S. Langa, H. Foll and H. L. Hartnagel, J. App. Phys, 89,2560 (2001).15. A. V. Zoteev, P. K. Kashkarov, A. N. Obraztsov and V. Y. Timoshenko, Semiconductors, 30, 775 (1996).16. A. A. Lebedev, V. Y. Rud and Y. V. Rud, Tech. Phys. Lett, 22, 754 (1996).17. H. Richter, Z. P. Wang, and L. Ley, Solid State Commum, 39, 625 (1981).18. L. H. Campbell and P. M.Fauchet, Solid State Commum, 58, 739 (1986).19. V. V. Ursaki, N. N. Syrbu, S. Albu, V. V. Zalamai, I. M. Tiginyanu, and R. W. Boyd, Semicond. Sci. Technl, 20, 745- 748 (2005)20. R. W. Tjerkstra, Electrochemical and Solid-State Letters,9 (5), C81-C84 (2006)

A new strategy to synthesize three-coordinate mononuclear copper(i) halide complexes containing a bulky terphenyl bidentate phosphine ligand and their luminescent properties

2019 ◽  
Vol 43 (8) ◽  
pp. 3390-3399 ◽  
Author(s):  
Li-Ping Liu ◽  
Rui Zhang ◽  
Li Liu ◽  
Xin-Xin Zhong ◽  
Fa-Bao Li ◽  
...  
Keyword(s):  
Solid State ◽  
Room Temperature ◽  
Green Emission ◽  
Luminescent Properties ◽  
Phosphine Ligand ◽  
New Strategy ◽  
Bidentate Phosphine ◽  
Halide Complexes ◽  
Bidentate Phosphine Ligand

Three mononuclear three-coordinate Cu(i) halide complexes were synthesized by a new strategy and they exhibit green to yellow green emission in the solid state at room temperature.

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