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 -