Interfacial Manganese-Doping in CsPbBr Nanoplatelets by Employing a Molecular Shuttle.

Angew Chem Int Ed Engl

Chair for Photonics and Optoelectronics, Nano-Institute Munich, Department of Physics, Ludwig-Maximilians-Universität München, Königinstr. 10, 80539, München, Germany.

Published: April 2022

AI Article Synopsis

  • - Mn-doping in cesium lead halide perovskite nanoplatelets (NPls) enhances exciton-dopant interactions, which are crucial for improving material properties.
  • - A novel bi-phasic method using oleylamine facilitates the transportation of MnX to the NPls, while halide anions help maintain the structural integrity needed for perovskite formation.
  • - By adjusting the thickness of the NPls, researchers can influence the incorporation of dopants and the efficiency of energy transfer processes; this method opens avenues for cation exchange in various halide perovskites.

Article Abstract

Mn-doping in cesium lead halide perovskite nanoplatelets (NPls) is of particular importance where strong quantum confinement plays a significant role towards the exciton-dopant coupling. In this work, we report an immiscible bi-phasic strategy for post-synthetic Mn-doping of CsPbX (X=Br, Cl) NPls. A systematic study shows that electron-donating oleylamine acts as a shuttle ligand to transport MnX through the water-hexane interface and deliver it to the NPls. The halide anion also plays an essential role in maintaining an appropriate radius of Mn and thus fulfilling the octahedral factor required for the formation of perovskite crystals. By varying the thickness of parent NPls, we can tune the dopant incorporation and, consequently, the exciton-to-dopant energy transfer process in doped NPls. Time-resolved optical measurements offer a detailed insight into the exciton-to-dopant energy transfer process. This new approach for post-synthetic cation doping paves a way towards exploring the cation exchange process in several other halide perovskites at the polar-nonpolar interface.

Download full-text PDF

Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9305410PMC
http://dx.doi.org/10.1002/anie.202115852DOI Listing

Publication Analysis

Top Keywords

exciton-to-dopant energy
8
energy transfer
8
transfer process
8
npls
5
interfacial manganese-doping
4
manganese-doping cspbbr
4
cspbbr nanoplatelets
4
nanoplatelets employing
4
employing molecular
4
molecular shuttle
4

Similar Publications

Ultrafast electron shuttling suppresses the energy transfer process in Mn-doped CsPbCl nanocrystals.

Phys Chem Chem Phys

July 2024

Nano Physical Spectroscopy Group, Department of Chemistry, School of Natural Sciences, Shiv Nadar Institution of Eminence, Delhi NCR, Uttar Pradesh-201314, India.

Taking advantage of the slow exciton-to-dopant energy transfer process, we dissociated the exciton in Mn-doped perovskite ultrafast electron shuttling to a surface adsorbed 4-nitro phenol molecule. The observed ultrafast electron transfer process is competitive to the ultrafast exciton scattering process (∼140 fs) to the continuum states optical phonons, but three-orders faster than the exciton-to-Mn energy transfer timescale.

View Article and Find Full Text PDF

Exciton-to-Dopant Energy Transfer Dynamics in Mn Doped CsPbBr Nanowires Synthesized by Diffusion Doping.

J Phys Chem Lett

December 2023

School of Physical Science and Technology, State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, Guangxi Key Laboratory of Processing for Non-ferrous Metals and Featured Materials, Guangxi University, Nanning 530004, China.

Mn doped perovskite nanocrystals have garnered significant attention in optoelectronic applications. However, the synthesis of Mn doped perovskite nanowires (NWs) poses challenges, and the dynamics of energy transfer from the exciton to Mn remains unexplored, which is crucial for optimizing Mn luminescence efficiency. Herein, we present a method to synthesize Mn doped CsPbBr NWs with a photoluminescence quantum yield of 52% by diffusing Mn into seed CsPbBr NWs grown via a hot injection method.

View Article and Find Full Text PDF

Interfacial Manganese-Doping in CsPbBr Nanoplatelets by Employing a Molecular Shuttle.

Angew Chem Int Ed Engl

April 2022

Chair for Photonics and Optoelectronics, Nano-Institute Munich, Department of Physics, Ludwig-Maximilians-Universität München, Königinstr. 10, 80539, München, Germany.

Mn-doping in cesium lead halide perovskite nanoplatelets (NPls) is of particular importance where strong quantum confinement plays a significant role towards the exciton-dopant coupling. In this work, we report an immiscible bi-phasic strategy for post-synthetic Mn-doping of CsPbX (X=Br, Cl) NPls. A systematic study shows that electron-donating oleylamine acts as a shuttle ligand to transport MnX through the water-hexane interface and deliver it to the NPls.

View Article and Find Full Text PDF

Excitation-Dependent Emission Color Tuning from an Individual Mn-Doped Perovskite Microcrystal.

J Am Chem Soc

December 2019

State Key Laboratory of Molecular Reaction Dynamics and the Dynamic Research Center for Energy and Environmental Materials , Dalian Institute of Chemical Physics, Chinese Academy of Sciences , Dalian 116023 , China.

Divalent manganese cation (Mn) doped perovskite materials are of great interest for their unique optical, magnetic, and electric properties. Herein, we report an excitation-dependent emission color tuning from an individual Mn-doped CsPbCl microcrystal (MC) with a wide color tuning range, reversible and continuous color change, and high photostability. We demonstrate that the Mn-doped CsPbCl MCs exhibit dual-color emission from both host excitons (blue) and Mn-dopants (orange) through an internal energy transfer (IET) process.

View Article and Find Full Text PDF

Coupled Halide-deficient and Halide-rich Reaction System for Doping in Perovskite Armed Nanostructures.

J Phys Chem Lett

November 2019

School of Materials Sciences, Indian Association for the Cultivation of Science , Kolkata 700032 , India.

Insights of Mn(II) doping in CsPbCl-armed hexapod nanostructures is reported. These complex structures were typically formed in halide concentration tuned modulated reactions. Cores were first formed under halide deficient condition and with enriching halides; these were transformed to armed structures.

View Article and Find Full Text PDF

Want AI Summaries of new PubMed Abstracts delivered to your In-box?

Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!