Ultrahigh Quantum Efficiency Near-Infrared-II Emission Achieved by Cr3+ Clusters to Ni2+ Energy Transfer
Journal
Chemistry of Materials
Journal Volume
36
Journal Issue
8
Pages
3941
Date Issued
2024-04-23
Author(s)
Chang, Chih Yu
Huang, Ming Hsuan
Chen, Kuan Chun
Huang, Wen Tse
Kamiński, Mikołaj
Majewska, Natalia
Klimczuk, Tomasz
Chen, Jia Hao
Cherng, Ding Hua
Lu, Kuang Mao
Pang, Wei Kong
Peterson, Vanessa K.
Mahlik, Sebastian
Leniec, Grzegorz
Abstract
Increasing demand for near-infrared-II (NIR-II) light sources requires improved NIR-II phosphors. We present a series of phosphors codoped with Cr3+ and Ni2+ that possess NIR-II emission with an unprecedented internal quantum efficiency (IQE) of 97.4%. Our study reveals an energy transfer mechanism involving clusters of Cr3+ where luminescent centers are closely matched in energy and where the Ni2+ emission intensity can be tuned through sintering temperature. The profound electron paramagnetic resonance (EPR) studies disclose the interaction between Cr3+ clusters and Cr3+-Ni2+ pairs, further proving the cause of such a high IQE and the significance of Cr3+ clusters. This work provides promising pathways for the development of NIR-II light-emitting diodes with outstanding efficiency by suggesting a new energy transfer source of Cr3+
Type
journal article