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 NIRII 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+.
Authors
- Chih-Yu Chang,
- Ming-Hsuan Huang,
- Kuan-Chun Chen,
- Wen-Tse Huang,
- Mikołaj Kamiński,
- mgr inż. Natalia Majewska,
- prof. dr hab. inż. Tomasz Klimczuk link open in new tab ,
- Jia-Hao Chen,
- Ding-Hua Cherng,
- Kuang-Mao Lu,
- Wei Kong Pang,
- Vanessa K. Peterson,
- Sebastian Mahlik,
- dr inż. Grzegorz Leniec,
- Ru-Shi Liu
Additional information
- DOI
- Digital Object Identifier link open in new tab 10.1021/acs.chemmater.4c00438
- Category
- Publikacja w czasopiśmie
- Type
- artykuły w czasopismach
- Language
- angielski
- Publication year
- 2024
