perovskite crystals*

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 ⁴F_9/2 to ⁴H_13/2 transition of Dy³⁺ ions. Additional emission bands arising from the ⁴F_9/2 excited states were centered at 485nm, 664nm and 752nm. The decay time of the ⁴F_9/2 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 (⁶H_7/2+⁶F_9/2 ->⁶H_15/2), 1.33 µm(⁶H_9/2+⁶F_11/2 ->⁶H_15/2) , 1.55 µm (⁶F_5/2 ->⁶H_11/2), and ~1.7 µm (⁶H_11/2 ->⁶H_15/2) 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.