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Applied Nanoscience

, Volume 8, Issue 6, pp 1267–1278 | Cite as

Color tunable emission through energy transfer from Yb3+ co-doped SrSnO3: Ho3+ perovskite nano-phosphor

  • Neha Jain
  • Rajan Kr. Singh
  • Shriya Sinha
  • R. A. Singh
  • Jai Singh
Original Article
  • 15 Downloads

Abstract

First time color tunable lighting observed from Ho3+ and Yb3+ co-doped SrSnO3 perovskite. Down-conversion and up-conversion (UC) photoluminescence emission spectra were recorded to understand the whole mechanism of energy migration between Ho3+ and Yb3+ ions. The intensity of green and red emission varies with Yb3+ doping which causes multicolour emissions from nano-phosphor. The intensity of UC red emission (654 nm) obtained from 1 at.% Ho3+ and 3 at.% Yb3+ co-doped nano-phosphor is nine times higher than from 1 at.% Ho3+ doped SrSnO3 nano-phosphor. Enhanced brightness of 654 nm in UC process belongs in biological transparency window so that it might be a promising phosphor in the bio-medical field. Moreover, for the other Yb3+ co-doped nano-phosphor, Commission Internationale de l’Éclairage chromaticity co-ordinates were found near the white region and their CCT values lie in the range 4900–5100 K indicating cool white. Decay time was measured for 545 nm emission of Ho3+ ion found in 7.652 and 8.734 µs at 355 nm excitation. The variation in lifetime was observed in ascending order with increasing Yb3+ concentration which supports PL emission spectra observation that with increasing Yb3+ concentration, rate of transition has changed. These studies reveal that Ho3+ and Yb3+ co-doped phosphor is useful for fabrication of white LEDs.

Keywords

SrSnO3 Nano-phosphor Mechanism Color tuning CCT CIE co-ordinate 

Notes

Acknowledgements

Authors are thankful to Sophisticated Instrument Centre of the University for providing various characterization facilities (XRD, SEM, HR-TEM, UV–visible spectrometer). We are thankful to Dr. Vasant Sathe, UGC-CSR-Indore for providing Micro-Raman Spectra. We are also thankful to Dr. Kaushal Kumar for providing Up-conversion PL facility. One of the authors (Neha) acknowledges the Central Research Fellowship provided by University Grants Commission (UGC), Govt. of India. Jai Singh would like to acknowledge UGC-India and DST for providing project under UGC Start-up Grant FT30 [HYPHEN] 56/2014 (BSR)3(A)a and DST Fast track Grant no. SR/FTP/PS [HYPHEN] 144/2012.

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  • Neha Jain
    • 1
  • Rajan Kr. Singh
    • 1
  • Shriya Sinha
    • 2
  • R. A. Singh
    • 1
  • Jai Singh
    • 1
  1. 1.Department of PhysicsDr. Harisingh Gour Central UniversitySagarIndia
  2. 2.Optical Materials and Bio-imaging Research Laboratory, Department of Applied PhysicsIndian Institute of Technology (Indian School of Mines) DhanbadDhanbadIndia

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