Abstract
Blue-emitting phosphors K2Ca1−xP2O7:xEu2+ (x = 0.005; 0.010; 0.015) were prepared by a solid-state reaction. The luminescence properties of the phosphors were systematically investigated. VUV photoluminescence spectra of K2Ca1−xP2O7:xEu2+ exhibit that three distinct bands peaking at 439, 478 and 535 nm can be attributed to the overlap of Eu(1), Eu(2) and Eu(3) emission bands, which are ascribed to the 4f–5d transition of Eu2+. The critical quenching concentration of Eu2+ in K2CaP2O7 phosphor is about 1 mol%, and the critical transfer distance was determined to be 32.23 Å. When the temperature turned up to 150 °C, the emission intensity of K2Ca0.99P2O7:0.01Eu2+ sample was 60% of the initial value at room temperature. The activation energy Ea was calculated to be 0.217 eV, which proved the good thermal stability of the phosphor. All the properties indicated that the K2CaP2O7:Eu2+ is promising blue-emitting phosphor for application in LED-based lighting or display systems.
Similar content being viewed by others
References
C.C. Lin, R.S. Liu, Advances in phosphors for light-emitting diodes. J. Phys. Chem. Lett. 2, 1268–1277 (2011)
S. Ye, F. Xiao, Y.X. Pan, Y.Y. Ma, Q.Y. Zhang, Phosphors in phosphor-converted white light-emitting diodes: recent advances in materials, techniques and properties. Mater. Sci. Eng. R. 71, 1–34 (2010)
Z.G. Xia, Q.L. Liu, Progress in discovery and structural design of color conversion phosphors for LEDs. Prog. Mater. Sci. 84, 59–117 (2016)
P.F. Smet, A.B. Parmentier, D. Poelman, Selecting conversion phosphors for white light-emitting diodes. J. Electrochem. Soc. 158, R37–R54 (2011)
S. Saha, S. Das, U.K. Ghorai, N. Mazumder, D. Ganguly, K.K. Chattopadhyay, Controlling nonradiative transition centers in Eu3+ activated CaSnO3 nanophosphors through Na+ Co-doping: realization of ultrabright red emission along with higher thermal stability. J. Phys. Chem. C. 119, 16824–16835 (2015)
X. Zhang, J.F. Sun, Intense blue emission of perovskite-type fluoride phosphor Cs4Mg3CaF12:Eu2+ as a promising pc-WLEDs material. J. Alloys Compd. 835, 155225–155237 (2020)
M. Nazarov, S. Mammadova, D. Spassky, S. Vielhauer, S. Abdullayeva, A. Huseynov, R. Jabbarov, SrAl2O4: Eu2+ (1%) luminescence under UV, VUV and electron beam excitation. Opt. Mater. 75, 448–452 (2018)
Y. Wen, Y. Wang, B. Liu, F. Zhang, Y. Shi, Novel blue-emitting KSrBP2O8:Eu2+ phosphor for near-UV light-emitting diodes. Funct. Mater. Lett. 5, 1250048–1250052 (2012)
D. Dutczak, T. Juostel, C. Ronda, A. Meijerink, Eu2+ luminescence in strontium aluminates. Phys. Chem. Chem. Phys. 17, 15236–15249 (2015)
H.J. Song, D.K. Yim, H.S. Roh, I.S. Cho, S.J. Kim, Y.H. Jin, H.W. Shim, D.W. Kim, K.S. Hong, RbBaPO4:Eu2+: a new alternative blue-emitting phosphor for UV-based white light-emitting diodes. J. Mater. Chem. C 1, 500–505 (2013)
H.J. Song, D.K. Yim, I.S. Cho, H.S. Roh, J.S. Kim, D.W. Kim, K.S. Hong, Luminescent properties of phosphor converted LED using an orange-emitting Rb2CaP2O7:Eu2+ phosphor. Mater. Res. Bull. 47, 4522–4526 (2012)
T. Senden, A. Meijerink, The d–f luminescence of Eu2+, Ce3+ and Yb2+ ions in Cs2MP2O7 (M = Ca2+, Sr2+). J. Lumin. 177, 254–260 (2016)
D. Hou, J.Y. Li, X. Pan, X. Ye, J. Fu, R. Li, Investigation on the ultraviolet-visible luminescence of Ce3+ activated K2CaP2O7 phosphor. ECS J. Solid State Sci. Technol. 5, R120–R123 (2016)
J.A. Wani, B.P. Kore, K.V. Dabre, S.J. Dhoble, V. Chopra, Spectroscopic investigation of rare earth activated potassium calcium pyrophosphate K2Ca1-xRExP2O7 (RE = Tb3+, Dy3+, Sm3+ and Eu3+) phosphors. Optik 228, 166142 (2020)
K.V. Terebilenko, N.S. Slobodyanik, V.P. Dotsenko, O.V. Khomenko, Synthesis and luminescence of europium (III)-doped potassium calcium pyrophosphate. Mat.-wiss. u. Werkstofftech. 47, 133–138 (2016)
E. Song, W. Zhao, G. Zhou, X. Dou, H. Ming, C. Yi, White light emitting from single phased K2Ca1-x-yP2O7: xEu2+, yMn2+ phosphors under UV excitation. Curr. Appl. Phys. 11, 1374–1378 (2011)
Y. Ding, L. Wang, M. Xu, D. Jia, R. Zhou, The energy transfer and thermal stability of a blue-green color tunable K2CaP2O7:Ce3+, Tb3+ phosphor. J. Am. Ceram. Soc. 100, 1–6 (2016)
E. Song, W. Zhao, X. Dou, Y. Zhu, S. Yi, H. Min, Non radiative energy transfer from Mn2+ to Eu3+ in K2CaP2O7:Mn2+, Eu3+ phosphor. J. Lumin. 132, 1462–1467 (2012)
M. Sandstroem, A. Fischer, D. Bostroem, CaK2P2O7. Acta Cryst. E 59, i139–i141 (2003)
M.S. Idrissi, L. Rghioui, R. Nejjar, L. Benarafa, M. SaidiIdrissi, A. Lorriaux, F. Wallart, Spectres de vibration des diphosphates monocliniques de formule AMP2O7. Spectrochim. Acta A 60, 2043–2052 (2004)
N. Khay, A. Ennaciri, M. Harcharros, Vibrational spectra of double diphosphates RbLnP2O7 (Ln = Dy, Ho, Y, Er, Tm, Yb). Vibration. Spectrosc. 27, 119–126 (2001)
V. Vincent, C. Breandon, G. Nihol, J.R. Gavarri, Infrared-spectroscopy and X-ray diffraction studies of the Ca2P2O7 Na4P2O7 system. Eur. J. Solid State Inorg. 34, 571–587 (1997)
J. Tauc, R. Grigorovici, A. Vancu, Optical properties and electronic structure of amorphous germanium. Phys. Status Sol. 15, 627–637 (1966)
A.A. Dakhel, Bandgap narrowing in CdO doped with europium. Opt. Mater. 31, 691–695 (2009)
P. Chen, Z. He, H.Y. He, Band gap narrowing of CdO powder by rare earth neodymium doping. J. Ceram. Process 14, 56–58 (2013)
M. Derbel, A. Mbarek, G. Chadeyron, M. Fourati, D. Zambon, R. Mahiou, Novel bluish white-emitting CdBaP2O7:Eu2+ phosphor for near-UV white-emitting diodes. J. Lumin. 176, 356–362 (2016)
D. Wang, Y. Wang, Y. Shi, Photoluminescence properties of Eu3+ in Y(PO3)3 under VUV excitation. J. Lumin. 131, 1154–1157 (2011)
Z. Chen, Y. Yan, Morphology control and VUV photoluminescence characteristics of BaMgAl10O17:Eu2+ phosphors. Phys. B 392, 1–6 (2007)
D. Nötzold, H. Wulff, S. Jilg, L. Kantz, L. Schwarz, Structure and optical properties under VUV/UV excitation of Eu2+ doped alkaline earth aluminate phosphors. Phys. Stat. Sol. 203, 919–929 (2006)
Z. Yang, G. Yang, S. Wang, J. Tian, X. Li, Q. Guo, G. Fu, A novel green-emitting phosphor NaCaPO4:Eu2+ for white LEDs. Mater. Lett. 62, 1884–1886 (2008)
N. Pradal, A. Potdevin, G. Chadeyron, P. Bonville, B. Caillier, R. Mahiou, Spectroscopic study and enhanced thermostability of combustion-derived BaMgAl10O17:Eu2+ blue phosphors for solid-state lighting. Opt. Mater. 64, 334–344 (2017)
K.N. Shinde, K. Park, Luminescence in Li3Al2(PO4)3:Eu2+. Luminescence 28, 793–796 (2012)
D. Hou, Ch. Liu, X. Ding, X. Kuang, H. Liang, S. Sun, Y. Huang, Y. Tao, A high efficiency blue phosphor BaCa2MgSi2O8:Eu2+ under VUV and UV excitation. J. Mater. Chem. C 1, 493–499 (2013)
G. Blasse, Energy transfer in oxidic phosphors. Phys. Lett. A 28, 444–445 (1968)
J. Zhao, S.X. Huang, D. Zhao, C.H. Huang, M.J. Ma, R.J. Zhang, Y.C. Fan, B.Z. Liu, J.W. Gao, Q. Zong, Y.P. Yu, Sm3+ doped K3Gd3B4O12: an orange-emitting phosphor for white light-emitting diodes. Optik 159, 115–122 (2018)
D.L. Dexter, A theory of sensitized luminescence in solids. J. Chem. Phys. 21, 836–850 (1953)
S. Saha, S. Das, U.K. Ghorai, N. Mazumder, B.K. Gupta, K.K. Chattopadhyay, Charge compensation assisted enhanced photoluminescence derived from Li-codoped MgAl2O4:Eu3+ nanophosphors for solid state lighting applications. Dalton Trans. 42, 12965–12974 (2013)
Y. Zhang, L. Li, X. Zhang, Q. Xi, Temperature effects on photoluminescence of YAG: Ce3+ phosphor and performance in white light-emitting diodes. J. Rare Earths 26, 446–449 (2008)
O.M. Ten Kate, J.R. Van Ommen, H.T.B. Hintzen, Influence of composition and structure on the thermal quenching of the 5d–4f emission of Eu2+ doped M–Si–N (M = alkali, alkaline earth, rare earth) nitridosilicates. J. Mater. Chem. C 7, 6289–6300 (2019)
R.J. Xie, N. Hirosaki, N. Kiumra, K. Sakuma, M. Mitomo, 2-phosphor-converted white light-emitting diodes using oxynitride/nitride phosphors. Appl. Phys. Lett. 90, 191101–191103 (2007)
J. Liu, Z.M. Zhang, Z.C. Wu, F.F. Wang, Z.J. Li, S.P. Kuang, M.M. Wu, Photoluminescence properties and thermal stability of blue-emitting Ba5-xCl(PO4)3:xEu2+ (0.004 ≤ x ≤ 0.016) phosphors. Spectrochim. Acta A 171, 126–131 (2017)
C. Liu, Z. Xia, Z. Lian, J. Zhoua, Q. Yan, Structure and luminescence properties of green-emitting NaBaScSi2O7:Eu2+ phosphors for near-UV-pumped light emitting diodes. J. Mater. Chem. C 1, 7139–7147 (2013)
Acknowledgements
Authors thank Professor Rachid Mahiou in Clermont-Ferrand Institute, SIGMA Clermont, for taking PL spectra in VUV region.
Author information
Authors and Affiliations
Corresponding author
Additional information
Publisher's Note
Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.
Rights and permissions
About this article
Cite this article
Mbarek, A., Derbel, M. & Chadeyron, G. VUV-UV photoluminescence, site occupancy and thermal stability of blue-emitting K2CaP2O7:Eu2+ UV-LED phosphor. J Mater Sci: Mater Electron 32, 21021–21031 (2021). https://doi.org/10.1007/s10854-021-06587-x
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s10854-021-06587-x