Recently, "Synchronous Outcoupling of Tri-Colored Light for Ultra-Bright White Quantum Dot Light-Emitting Diodes by Using External Wrinkle Pattern" was published in Advanced Optical Materials (IF= 9.926, JCR District 1) by the research group of Professor Du Zuliang of Henan University. .
The wrinkled structure was prepared by self-assembly method as the external structure of the white light QLED device. The wrinkled structure can effectively enhance the optical coupling efficiency of the white light QLED device. cd m-2 increased to 13.41%, 26.8 cd A-1 and 136207 cd m-2. The high current density generated by the red-green-blue quantum dots as a parallel structure and the efficient extraction of red-green-blue trapped light are the reasons for obtaining ultra-high brightness white light QLEDs.
The color temperature range of standard white light devices is 1863 K~5371 K, and the color temperature range of corrugated white light devices is 2291 K~6912 K; compared with standard devices, the color temperature of corrugated devices can cover from pure white light (5115 K) to cool white light (6912 K). K) for a wider range. This work provides a unique and efficient method for light extraction and color temperature regulation of white light QLEDs.
Doctoral students Qi Hui and Dr. Wang Shujie are the co-first authors of the paper, and Professor Du Zuliang is the corresponding author of this paper. This work was supported by the National Natural Science Foundation of China, the Science and Technology Department of Henan Province and Henan University.
