发光二极管
光电子学
RGB颜色模型
光刻胶
材料科学
分布式布拉格反射镜
绿灯
二极管
氮化镓
光学
蓝光
物理
纳米技术
操作系统
计算机科学
图层(电子)
波长
作者
Guan Syun Chen,Bo Yu Wei,Ching-Ting Lee,Hsin Ying Lee
出处
期刊:IEEE Photonics Technology Letters
[Institute of Electrical and Electronics Engineers]
日期:2018-02-01
卷期号:30 (3): 262-265
被引量:79
标识
DOI:10.1109/lpt.2017.2786737
摘要
In this letter, monolithic red, green, and blue (RGB) micro light-emitting diodes (LEDs) were fabricated using gallium nitride based blue micro LEDs and quantum dots (QDs). Red and green QDs were sprayed onto individual region surrounded by patterned black matrix photoresist on the blue micro LEDs to form color conversion layers. Owing to its light-blocking capability, the patterned black matrix photoresist improved the contrast ratio of the micro LEDs from 11 to 22. To enhance the color conversion efficiency and the light output intensity, a hybrid Bragg reflector (HBR) was deposited on the bottom side of the monolithic RGB micro LEDs, thus reflecting the RGB light emitted to the substrate. To further improve the color purity of the red and green light, a distributed Bragg reflector (DBR) with high reflection for the blue light was deposited on the top side of the QDs/micro LEDs. The red and green light output intensities of the micro LEDs with HBR and DBR were enhanced by about 27%.
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