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Robust white light emission of UV pumped SrCeO3: xSm3+ perovskites for wLEDs

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Veröffentlicht/Copyright: 22. August 2023
Zeitschrift für Naturforschung A
Aus der Zeitschrift Zeitschrift für Naturforschung A Band 78 Heft 10

Abstract

Single phased white light emitting phosphors are more ideal for fabricating white LEDs due to higher stability and color reproducibility. Herein, we report a new white light emitting phosphor, SrCeO3: xSm3+ (x = 1 wt%, 2 wt%, 3 wt%) from a blue light emitting phosphor, SrCeO3 using an efficient, low energy consuming fuel excess gel combustion technique. From the XRD crystallographic investigation, all the synthesised samples have orthorhombic structure with space group Pnma. A broad absorption band in the UV–visible spectra around 350 nm occurs due to the efficient energy transfer from Ce4+ to Sm3+ ion. PL spectra analysis at UV excitations 280 nm and 406 nm, consist of 4f-Sm3+ transitions 4G5/2-6H5/2, 4G5/2-6H7/2, 4G5/2-6H9/2 and charge transfer band from O2− to Ce4+. The energy transfer between activator ions occurs through dipole–dipole interaction, owing to concentration quenching after 2 wt% Sm3+ and the optimised dopant concentration was 2 wt%. SrCe0.98Sm0.02O3 showed mixed blue-yellow-orange-red emission, owing near white light under both excitations. PL data were utilised to find the color parameters and found high color rendering index (CRI ∼ 84) for optimised sample at 406 nm excitation. SEM analysis reveals that the optimised sample exhibit dense ensembled morphology with well-defined grain boundaries and uniformity with average grain size ∼1.24 μm. Further, the elemental composition was confirmed using EDS analysis. From the digital photographs of samples, it is foreseen that, SrCe0.98Sm0.02O3 pumped using near UV LED chip can be used for commercial white light generation.

Keywords: luminescence; phosphor; samarium
Corresponding author: Nissamudeen Kavukuzhi Meerasahib, School of Pure and Applied Physics, Kannur University, Payyanur Campus, Edat, Kannur, Kerala 670327, India, E-mail:

Acknowledgment

We extend our sincere thanks to all the concerned authorities of the Kannur University who provided me sufficient facilities here for doing my research.

  1. Research ethics: Not applicable.

  2. Author contributions: Shilpa C K has designed the framework of manuscript. Shilpa C K, Jasira S V, Veena V P, Umadevi P and Nissamudeen K M carried out the implementation. All the authors have accepted responsibility for the entire content of this manuscript and approved the submission.

  3. Competing interests: The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.

  4. Research funding: None declared.

  5. Data availability: The raw data can be obtained on request from the corresponding author.

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Received: 2023-06-12
Accepted: 2023-08-04
Published Online: 2023-08-22
Published in Print: 2023-10-26

© 2023 Walter de Gruyter GmbH, Berlin/Boston

Artikel in diesem Heft

  1. Frontmatter
  2. Dynamical Systems & Nonlinear Phenomena
  3. Bifurcation analysis of ion-acoustic superperiodic waves in ultra-relativistic dense plasma
  4. Unsteady temperature distribution in a cylinder made of functionally graded materials under circumferentially-varying convective heat transfer boundary conditions
  5. Hydrodynamics
  6. Refined composite multivariate multiscale complexity-entropy causality plane analysis for gas-liquid two-phase flow
  7. Solid State Physics & Materials Science
  8. Red-emitting phosphors of BaSr2(PO4)2: 4 %Eu3+, 4 %A (A = Li+, Na+, K+) for white LEDs
  9. Effect of deposition potential and saccharin addition on structural, magnetic and magnetoresistance characteristics of NiCoFeCu films
  10. Structural and optical analysis of nanostructural CuCrO3 perovskite by sol–gel method
  11. Investigation of alkali halide crystals AX (A = Li, Na, K; X = F, Cl, Br) by elastic, mechanical and ultrasonic analysis
  12. Robust white light emission of UV pumped SrCeO3: xSm3+ perovskites for wLEDs
  13. Thermodynamics & Statistical Physics
  14. Theoretical determination of speed of sound and fourth virial coefficient by using Kihara (12–6) potential
https://doi.org/10.1515/zna-2023-0145
Schlagwörter für diesen Artikel
luminescence; phosphor; samarium

Artikel in diesem Heft

  1. Frontmatter
  2. Dynamical Systems & Nonlinear Phenomena
  3. Bifurcation analysis of ion-acoustic superperiodic waves in ultra-relativistic dense plasma
  4. Unsteady temperature distribution in a cylinder made of functionally graded materials under circumferentially-varying convective heat transfer boundary conditions
  5. Hydrodynamics
  6. Refined composite multivariate multiscale complexity-entropy causality plane analysis for gas-liquid two-phase flow
  7. Solid State Physics & Materials Science
  8. Red-emitting phosphors of BaSr2(PO4)2: 4 %Eu3+, 4 %A (A = Li+, Na+, K+) for white LEDs
  9. Effect of deposition potential and saccharin addition on structural, magnetic and magnetoresistance characteristics of NiCoFeCu films
  10. Structural and optical analysis of nanostructural CuCrO3 perovskite by sol–gel method
  11. Investigation of alkali halide crystals AX (A = Li, Na, K; X = F, Cl, Br) by elastic, mechanical and ultrasonic analysis
  12. Robust white light emission of UV pumped SrCeO3: xSm3+ perovskites for wLEDs
  13. Thermodynamics & Statistical Physics
  14. Theoretical determination of speed of sound and fourth virial coefficient by using Kihara (12–6) potential
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