Efficient near‐infrared emission in lanthanum ion doped double perovskite Cs2NaScCl6 via Cr3+ sensitization under visible light excitation
Weiguo Huang,
Hui Peng,
Jinling Huang,
Ye Yang,
Qilin Wei,
Bao Ke,
Muhammad Sheraz Khan,
Jialong Zhao,
Bingsuo Zou
Affiliations
Weiguo Huang
State Key Laboratory of Featured Metal Materials and Life‐cycle Safety for Composite Structures, MOE Key Laboratory of New Processing Technology for Nonferrous Metals and Materials, and School of Resources, Environment and Materials Guangxi University Nanning China
Hui Peng
State Key Laboratory of Featured Metal Materials and Life‐cycle Safety for Composite Structures, MOE Key Laboratory of New Processing Technology for Nonferrous Metals and Materials, and School of Resources, Environment and Materials Guangxi University Nanning China
Jinling Huang
State Key Laboratory of Featured Metal Materials and Life‐cycle Safety for Composite Structures, MOE Key Laboratory of New Processing Technology for Nonferrous Metals and Materials, and School of Resources, Environment and Materials Guangxi University Nanning China
Ye Yang
State Key Laboratory of Featured Metal Materials and Life‐cycle Safety for Composite Structures, MOE Key Laboratory of New Processing Technology for Nonferrous Metals and Materials, and School of Resources, Environment and Materials Guangxi University Nanning China
Qilin Wei
School of Chemistry and Chemical Engineering Shandong University Jinan China
Bao Ke
School of Physical Science and Technology Guangxi University Nanning China
Muhammad Sheraz Khan
State Key Laboratory of Featured Metal Materials and Life‐cycle Safety for Composite Structures, MOE Key Laboratory of New Processing Technology for Nonferrous Metals and Materials, and School of Resources, Environment and Materials Guangxi University Nanning China
Jialong Zhao
School of Physical Science and Technology Guangxi University Nanning China
Bingsuo Zou
State Key Laboratory of Featured Metal Materials and Life‐cycle Safety for Composite Structures, MOE Key Laboratory of New Processing Technology for Nonferrous Metals and Materials, and School of Resources, Environment and Materials Guangxi University Nanning China
Abstract Herein, we synthesized Cr3+/Ln3+ (Er3+, Tm3+)‐codoped rare earth‐based Cs2NaScCl6 double perovskite, and the near‐infrared emission of Ln3+ can be excited by visible light through the energy transfer (ET) from Cr3+ to Ln3+. Moreover, there are two independent emission bands, which stems from 4T2 → 4A2 transition of Cr3+ (970 nm) and f‐f transition of Ln3+ (1542 nm for Er3+ and 1220 nm for Tm3+), respectively. Particularly, both compounds have ultra‐high photoluminescence quantum yield (PLQY) of 60% for 10%Cr3+/6%Er3+‐codoped Cs2NaScCl6 (Er3+ emission: ∼26%) and 68% for 10%Cr3+/4.5%Tm3+‐codoped Cs2NaScCl6 (Tm3+ emission: ∼56%), which can be attributed to the ultra‐high ET efficiency from Cr3+ to Ln3+ and the similar ionic activity of Sc3+ and Ln3+ allowing more dopants enter the host lattice. Considering the excellent stability of the samples, we demonstrated Cr3+/Tm3+‐codoped Cs2NaScCl6 in the applications of near‐infrared imaging and night vision. Finally, we reported 10%Cr3+/4.5%Tm3+/9%Er3+‐tridoped Cs2NaScCl6 and further applied it for optical thermometry.
