B63.00012. Visible and near-infrared emission properties of melt-grown Dy doped CsPbCl3 perovskite crystals

Presented by: Samuel Uba


Abstract

Doping of lead halides perovskites with rare-earth metals ions has become of significant current interest for possible applications in optoelectronics. In this research, we studied the material preparation and the visible to near IR optical properties of Dy3+ doped CsPbCl3. The crystal was synthesized from purified starting materials and melt-grown by vertical Bridgman technique. Visible emission studies under resonant-intra-4f excitation at ~450nm revealed bright yellow emission centered at 575nm arising from the 4F9/2 to 4H13/2 transition of Dy3+ ions. Additional emission bands arising from the 4F9/2 excited states were centered at 485nm, 664nm and 752nm. The decay time of the 4F9/2 level was non-exponential with an average lifetime of ~320 µs. Near-infrared emission studies were performed using a 808 nm diode lasers and revealed several IR bands located at 1.14 µm (6H7/2+6F9/2 ->6H15/2), 1.33 µm(6H9/2+6F11/2 ->6H15/2) , 1.55 µm (6F5/2 ->6H11/2), and ~1.7 µm (6H11/2 ->6H15/2) arising from lower excited states of Dy3+ ions. More details of the emission spectra and dynamics of Dy: CsPbCl3 as well as a comparison to Dy: KPbCl2 will be presented at the conference.

Authors

  • Uwe Hommerich
  • Alix Allen


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