Improved Doping and Emission Efficiencies of Mn-Doped CsPbCl3 Perovskite Nanocrystals via Nickel Chloride

Ke Xing; Xi Yuan; Yu Wang; Ji Li; Yunjun Wang; Yi Fan; Long Yuan; Kai Li; Zhijian Wu; Haibo Li; Jialong Zhao

doi:10.1021/acs.jpclett.9b01588

Improved Doping and Emission Efficiencies of Mn-Doped CsPbCl₃ Perovskite Nanocrystals via Nickel Chloride

J Phys Chem Lett. 2019 Aug 1;10(15):4177-4184. doi: 10.1021/acs.jpclett.9b01588. Epub 2019 Jul 12.

Authors

Ke Xing¹, Xi Yuan¹, Yu Wang¹, Ji Li¹, Yunjun Wang², Yi Fan³, Long Yuan¹, Kai Li⁴, Zhijian Wu⁴, Haibo Li¹, Jialong Zhao^{1

5}

Affiliations

¹ Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education , Jilin Normal University , Changchun 130103 , China.
² Suzhou Xingshuo Nanotech Co., Ltd. (Mesolight) , Suzhou 215123 , China.
³ State Key Laboratory of Luminescence and Applications , Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences , Changchun 130033 , China.
⁴ State Key Laboratory of Rare Earth Resource Utilization , Changchun Institute of Applied Chemistry, Chinese Academy of Sciences , Changchun 130022 , China.
⁵ Key Laboratory of Preparation and Application of Environmental Friendly Materials, Ministry of Education , Jilin Normal University , Changchun 130103 , China.

PMID: 31291544
DOI: 10.1021/acs.jpclett.9b01588

Abstract

It is challenging to improve the emission efficiency of Mn-doped CsPbCl₃ (Mn:CsPbCl₃) nanocrystals (NCs) because the excellent optical performances are dependent on high doping efficiency and few defects and traps. Steady-state and time-resolved photoluminescence (PL) spectroscopies were used to investigate the luminescence properties of Mn:CsPbCl₃ NCs with different Mn doping levels synthesized in the presence of nickel chloride. The doping efficiency of Mn ions in Mn:CsPbCl₃ NCs was greatly enhanced in the presence of NiCl₂, and the PL wavelength of Mn²⁺ ions was tuned from 594 to 638 nm by varying the concentration of dopant Mn from 0.11% to 15.25%. The high emission quantum yields of Mn:CsPbCl₃ NCs with orange and red emissions peaked at 600 and 620 nm in hexane were 70% and 39%, respectively. The improvement in doping and emission efficiencies of Mn²⁺ was attributed to the enhanced formation energies of the Mn doping under the Mn and Ni codoped configuration and the resulting reduction of defects and traps in Mn:CsPbCl₃ NCs with incorporation of Ni²⁺ ions.