Precise Ligand Tuning Emission of Mn-Doped CsPbCl₃Nanocrystals by the Amount of Sulfonates

TY - JOUR

T1 - Precise Ligand Tuning Emission of Mn-Doped CsPbCl3Nanocrystals by the Amount of Sulfonates

AU - Luo, Dengfeng

AU - Yang, Sirui

AU - Zhang, Qing

AU - Cha, Limei

AU - Dang, Li

AU - Li, Ming De

N1 - Publisher Copyright: © 2021 American Chemical Society.

PY - 2021/2/25

Y1 - 2021/2/25

N2 - Using Mn-doped CsPbCl3 nanocrystals (Mn:CsPbCl3 NCs) to improve perovskite's properties is becoming an important strategy. Here, we demonstrate a modified supersaturated recrystallization route to synthesize high-quality Mn:CsPbCl3 NCs at room temperature. Unprecedentedly, sulfonate ligands with various concentrations are shown to successfully tune the dual-color emission of Mn:CsPbCl3 NCs. Ultrafast transient absorption studies reveal that the host-to-dopant internal energy-transfer process involves the mediated traps. Interestingly, the dual-color emission is tuned via stabilizing mediated traps with a small amount of ligand (band edge (BE) emission reduces and Mn2+ emission increases), passivating the deep traps with a large amount of ligand (Mn2+ emission increases), and destroying Mn:CsPbCl3 NCs with too much ligand (both BE and Mn2+ emission is quenched). Furthermore, the ligand tuning Mn2+ emission exhibits quenching for Cu2+ with high sensitivity and selectivity. Our work provides a new strategy to tune the optical properties of Mn:CsPbCl3 NCs and presents its potential application in an optical detector.

AB - Using Mn-doped CsPbCl3 nanocrystals (Mn:CsPbCl3 NCs) to improve perovskite's properties is becoming an important strategy. Here, we demonstrate a modified supersaturated recrystallization route to synthesize high-quality Mn:CsPbCl3 NCs at room temperature. Unprecedentedly, sulfonate ligands with various concentrations are shown to successfully tune the dual-color emission of Mn:CsPbCl3 NCs. Ultrafast transient absorption studies reveal that the host-to-dopant internal energy-transfer process involves the mediated traps. Interestingly, the dual-color emission is tuned via stabilizing mediated traps with a small amount of ligand (band edge (BE) emission reduces and Mn2+ emission increases), passivating the deep traps with a large amount of ligand (Mn2+ emission increases), and destroying Mn:CsPbCl3 NCs with too much ligand (both BE and Mn2+ emission is quenched). Furthermore, the ligand tuning Mn2+ emission exhibits quenching for Cu2+ with high sensitivity and selectivity. Our work provides a new strategy to tune the optical properties of Mn:CsPbCl3 NCs and presents its potential application in an optical detector.

UR - http://www.scopus.com/inward/record.url?scp=85101706804&partnerID=8YFLogxK

U2 - 10.1021/acs.jpclett.1c00088

DO - 10.1021/acs.jpclett.1c00088

M3 - 文章

C2 - 33577333

AN - SCOPUS:85101706804

SN - 1948-7185

VL - 12

SP - 1838

EP - 1846

JO - Journal of Physical Chemistry Letters

JF - Journal of Physical Chemistry Letters

IS - 7

ER -