title: Exciton-to-Dopant Energy Transfer in Mn-Doped Cesium Lead Halide Perovskite Nanocrystals.
abstract: We report the one-pot synthesis of colloidal Mn-doped cesium lead halide (CsPbX3) perovskite nanocrystals and efficient intraparticle energy transfer between the exciton and dopant ions resulting in intense sensitized Mn luminescence. Mn-doped CsPbCl3and CsPb(Cl/Br)3nanocrystals maintained the same lattice structure and crystallinity as their undoped counterparts with nearly identical lattice parameters at ∼0.2% doping concentrations and no signature of phase separation. The strong sensitized luminescence from d-d transition of Mn2+ions upon band-edge excitation of the CsPbX3host is indicative of sufficiently strong exchange coupling between the charge carriers of the host and dopant d electrons mediating the energy transfer, essential for obtaining unique properties of magnetically doped quantum dots. Highly homogeneous spectral characteristics of Mn luminescence from an ensemble of Mn-doped CsPbX3nanocrystals and well-defined electron paramagnetic resonance spectra of Mn2+in host CsPbX3nanocrystal lattices suggest relatively uniform doping sites, likely from substitutional doping at Pb2+. These observations indicate that CsPbX3nanocrystals, possessing many superior optical and electronic characteristics, can be utilized as a new platform for magnetically doped quantum dots expanding the range of optical, electronic, and magnetic functionality.
authors: Department of Chemistry and ‡Department of Materials Science and Engineering, Texas A&M University , College Station, Texas 77843, United States.
authors: David
authors: D
authors: Parobek
authors: Department of Chemistry and ‡Department of Materials Science and Engineering, Texas A&M University , College Station, Texas 77843, United States.
authors: Benjamin J
authors: BJ
authors: Roman
authors: Department of Chemistry and ‡Department of Materials Science and Engineering, Texas A&M University , College Station, Texas 77843, United States.
authors: Yitong
authors: Y
authors: Dong
authors: Department of Chemistry and ‡Department of Materials Science and Engineering, Texas A&M University , College Station, Texas 77843, United States.
authors: Ho
authors: H
authors: Jin
authors: Department of Chemistry and ‡Department of Materials Science and Engineering, Texas A&M University , College Station, Texas 77843, United States.
authors: Elbert
authors: E
authors: Lee
authors: Department of Chemistry and ‡Department of Materials Science and Engineering, Texas A&M University , College Station, Texas 77843, United States.
authors: Matthew
authors: M
authors: Sheldon
authors: Department of Chemistry and ‡Department of Materials Science and Engineering, Texas A&M University , College Station, Texas 77843, United States.
authors: Dong Hee
authors: DH
authors: Son
keywords: Mn-doping; Perovskite; exciton-to-dopant energy transfer; sensitized phosphorescence