Professor Tang Jiang and his team from the Wuhan National Laboratory for Optoelectronics and School of Optical and Electronic Information have developed a series of rare earth cerium halide luminescent materials, which achieve continuous and highly efficient and stable luminescence from violet light to deep blue light. They have realized for the first time deep blue photoluminescent diode chips, large-area and pixelated light-emitting devices and films based on them. It shows great potential for high-quality display applications.

On December 16th, related results were presented in an article named "Spectra stable deep-blue light-emitting diodes based on cryolite-like cerium(III) halides with nanosecond d-f emission" which was published in the latest issue of the journal ScienceAdvances.

Professor Tang Jiang and his team developed cerium halide Cs₃CeBr_xI_6-x (x=0~6), which can be continuously tunable from blue light to violet light, by taking advantage of the high PLQY, bright color, stable spectrum, low price, non-toxic and environmentally friendly, abundant reserves and other significant advantages of lanthanide rare earth cerium. For the first time, the team systematically explored the material's crystal structure, band structure, luminescence mechanism, and its application in rare earth light-emitting diode (RELED) chips. In particular, Cs₃CeI₆ has bright deep blue emission with color coordinates of (0.15, 0.04), which is in line with the most stringent Rec.2020 Blu-ray chip standard.