First Synthesis of Mn-Doped Cesium Lead Bromide Perovskite Magic Sized Clusters at Room Temperature | Zendy

Ke Xu | Zendy; Evan T. Vickers | Zendy; Binbin Luo | Zendy; A’Lester C. Allen | Zendy; Eefei Chen | Zendy; Graham Roseman | Zendy; Qihui Wang | Zendy; David S. Kliger | Zendy; Glenn L. Millhauser | Zendy; Wen Yang | Zendy; Xueming Li | Zendy; Jin Z. Zhang | Zendy

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First Synthesis of Mn-Doped Cesium Lead Bromide Perovskite Magic Sized Clusters at Room Temperature

Author(s) -

Ke Xu,

Evan T. Vickers,

Binbin Luo,

A’Lester C. Allen,

Eefei Chen,

Graham Roseman,

Qihui Wang,

David S. Kliger,

Glenn L. Millhauser,

Wen Yang,

Xueming Li,

Jin Z. Zhang

Publication year - 2020

Publication title -

the journal of physical chemistry letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.563

H-Index - 203

ISSN - 1948-7185

DOI - 10.1021/acs.jpclett.9b03700

Subject(s) - photoluminescence , materials science , dopant , perovskite (structure) , doping , passivation , exciton , quantum dot , analytical chemistry (journal) , nanotechnology , optoelectronics , chemistry , crystallography , condensed matter physics , physics , layer (electronics) , chromatography

Mn-doped CsPbBr 3 perovskite magic sized clusters (PMSCs) are synthesized for the first time using benzoic acid and benzylamine as passivating ligands and MnCl 2 ·4H 2 O and MnBr 2 as the Mn 2+ dopant sources at room temperature. The same approach is used to prepare Mn-doped CsPbBr 3 perovskite quantum dots (PQDs). The concentration of MnX 2 (X = Cl or Br) affects the excitonic absorption of the PMSCs and PQDs. A higher concentration of MnX 2 favors PMSCs over PQDs as well as higher photoluminescence (PL) quantum yields (QYs) and PL stability. The large ratio between the characteristic Mn emission (∼590 nm) and the host band-edge emission shows efficient energy transfer from the host exciton to the Mn 2+ dopant. PL excitation, electron paramagnetic resonance, and time-resolved PL results all support Mn 2+ doping in CsPbBr 3 , which likely replaces Pb 2+ ions. This study establishes a new method for synthesizing Mn-doped PMSCs with good PL stability, high PLQY and highly effective passivation.

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