Size-Tunable Manganese-Doped Spheroidal CsPbCl3 Quantum Dots

被引：6

作者：

von Schwerin, Patrick ^{[1
,2
]}

Doeblinger, Markus ^{[3
]}

Debnath, Tushar ^{[1
,2
,4
]}

Feldmann, Jochen ^{[1
,2
]}

Akkerman, Quinten A. ^{[1
,2
]}

机构：

[1] Ludwig Maximilians Univ LMU, Chair Photon & Optoelect, Nanoinst Munich, D-80539 Munich, Germany

[2] Ludwig Maximilians Univ LMU, Dept Phys, D-80539 Munich, Germany

[3] Ludwig Maximilians Univ Munchen, Dept Chem, D-81377 Munich, Germany

[4] Shiv Nadar Inst Eminence, Sch Nat Sci, Dept Chem, Nano Phys Spect Grp, Greater Noida 201314, Uttar Pradesh, India

来源：

JOURNAL OF PHYSICAL CHEMISTRY LETTERS | 2024年 / 15卷 / 14期

关键词：

HALIDE PEROVSKITE NANOCRYSTALS; ENERGY-TRANSFER; CSPBX3; MN; BR; CL; EMISSION; DYNAMICS;

D O I：

10.1021/acs.jpclett.4c00049

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Manganese doping has been demonstrated as a versatile tool to tune the emission of CsPbCl3 nanocrystals (NCs). Although this has been demonstrated in nanocubes and nanoplatelets, strategies for doping Mn2+ in size-tunable, excitonic CsPbCl3 quantum dots (QDs) remain absent. In this work, we demonstrate the synthesis of size-tunable spheroidal CsPbCl3:Mn2+ QDs, which can be obtained by a water-hexane interfacial combined anion and cation exchange strategy starting from CsPbBr3 QDs. Interestingly, the QDs exhibit a fast 0.2 ms Mn2+ photoluminescence (PL) lifetime and an energy transfer (ET) time of approximately 100 ps from the excitonic state of the QD to the atomic state of the Mn2+ ion. The size dependence observation of the manganese PL efficiency and the slow ET rate suggest that Mn2+ mainly gets incorporated at the QD's surface, highlighting the importance of strategies chosen for the incorporation of Mn2+ into perovskite QDs.

引用

页码：3728 / 3732

页数：5

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