发光二极管
皱纹
光电子学
衍射
材料科学
二极管
量子点
亮度
衍射光栅
光学
联轴节(管道)
栅栏
物理
复合材料
冶金
作者
Hui Qi,Ping Guo,Peiling Yuan,Shuaipu Zang,Xingxing Ding,Ying Zhang,Wentao Jin,Kun Zhang,Ling Chen
标识
DOI:10.1002/pssr.202300173
摘要
Highly efficient blue quantum‐dot light‐emitting diodes (QLEDs) are still a challenge for displays and solid‐state lighting due to light trapping in a device. Herein, an internal diffraction wrinkle pattern is used to demonstrate a spectrum‐independent enhancement strategy for light out‐coupling. The optimized device with wrinkle pattern shows a peak external quantum efficiency of 15.25% and a maximum luminance of 13 134 cd m −2 , and the enhancement of those is 23% and 28%, respectively. The improvement of device performance can be attributed to the extraction of waveguide light by the internal wrinkle pattern used as a diffraction grating. Moreover, simulation also shows that wrinkle pattern is an attractive option to improve the performances of blue QLEDs.
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