Cr3+ and Yb3+ co-doped perovskite-like phosphor with improved thermal stability by efficient energy transfer
Meijuan Zheng,
Xiaoling Dong,
Dan Wu,
Yue Wang,
Wenping Zhou,
Yifan Liu,
Liangliang Zhang
Affiliations
Meijuan Zheng
Inner Mongolia Key Lab of Nanoscience and Nanotechnology, School of Physical Science and Technology, Inner Mongolia University, Hohhot 010021, People’s Republic of China
Xiaoling Dong
Inner Mongolia Key Lab of Nanoscience and Nanotechnology, School of Physical Science and Technology, Inner Mongolia University, Hohhot 010021, People’s Republic of China
Dan Wu
Inner Mongolia Key Lab of Nanoscience and Nanotechnology, School of Physical Science and Technology, Inner Mongolia University, Hohhot 010021, People’s Republic of China
Yue Wang
Inner Mongolia Key Lab of Nanoscience and Nanotechnology, School of Physical Science and Technology, Inner Mongolia University, Hohhot 010021, People’s Republic of China
Wenping Zhou
Inner Mongolia Key Lab of Nanoscience and Nanotechnology, School of Physical Science and Technology, Inner Mongolia University, Hohhot 010021, People’s Republic of China
Yifan Liu
Inner Mongolia Key Lab of Nanoscience and Nanotechnology, School of Physical Science and Technology, Inner Mongolia University, Hohhot 010021, People’s Republic of China
Liangliang Zhang
State Key Laboratory of Luminescence and Applications, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, 3888 Eastern South Lake Road, Changchun 130033, China
With the development of white light-emitting diode (LED) technology, near-infrared (NIR) phosphor-converted (pc) LED is becoming a new emerging light source. However, due to the lack of long wavelength components of the phosphors, the application of NIR pc-LED is restricted. In this work, a continuous ultra-broadband NIR emission without the emission gap in the 850–950 nm region has been realized in the Mg4Nb2O9 (MNO):Cr3+, Yb3+ phosphor. Meanwhile, when compared to MNO:Cr3+, an improved internal quantum efficiency (from 55.4% to 72.6%) and thermal stability (from 39% to 63% at 100 °C) have been obtained for MNO:Cr3+, Yb3+, which is attributed to the combined effect of the efficient energy transfer from Cr3+ to its nearest Yb3+ and the unique energy levels of Yb3+. The performances of the fabricated pc-LED devices by combining MNO:Cr3+, Yb3+ with 460 nm LED chips were also given, and the results demonstrate that the MNO:Cr3+, Yb3+ phosphor may have potential for practical application in the NIR pc-LED.
