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Up-Conversion in Perovskite Strontium Stannate Nanocrystal Whiskers

  • Ashok Kumar
  • Vikas Sahrawat
  • Astakala Anil Kumar
  • Shashank Priya
Technical Paper

Abstract

We report a simple, eco-friendly facile wet chemical route for the synthesis of pristine and rare–earth metal co-doped (Er/Yb, 10/90, 15/85, 20/80) nano-crystalline, strontium stannate (SrSnO3) whiskers. It is n-type wide bandgap (~4.1 eV) orthorhombic perovskite semiconductor at room temperature, and reveals increase in band gap with the increase in Er/Yb content (from 4.10 to 4.23, 4.30 to 4.39 eV). The samples exhibited strong emission around 365 nm following band-edge excitation by the wavelength of 290 nm. Further, strong up-conversion emission was observed in visible range at the excitation of wavelength 980 nm. The resistivity values were found to decrease with increase in the dopants Er/Yb concentration due to enhancement of charge carriers.

Keywords

Chemical synthesis Perovskite Up–conversion Optical properties Conductivity 

Notes

Acknowledgements

This work was supported in part by SERB, Government of India (SB/FTP/ETA-243/2012, 2013-2016).

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Copyright information

© The Indian Institute of Metals - IIM 2017

Authors and Affiliations

  • Ashok Kumar
    • 1
  • Vikas Sahrawat
    • 2
  • Astakala Anil Kumar
    • 1
  • Shashank Priya
    • 3
  1. 1.Department of PhysicsNational Institute of Technology KurukshetraKurukshetraIndia
  2. 2.School of Material Science and NanotechnologyNational Institute of Technology KurukshetraKurukshetraIndia
  3. 3.Center for Energy Harvesting Materials and Systems (CEHMS)Virginia TechBlacksburgUSA

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