Demonstration of high efficiency cascaded blue and green micro-light-emitting diodes with independent junction control

被引：19

作者：

Li, Panpan ^{[1
]}

Li, Hongjian ^{[1
]}

Yao, Yifan

Zhang, Haojun ^{[1
,2
]}

Lynsky, Cheyenne ^{[1
]}

Qwah, Kai Shek ^{[1
]}

Speck, James S. ^{[1
]}

Nakamura, Shuji ^{[1
,2
]}

DenBaars, Steven P. ^{[1
,2
]}

机构：

[1] Univ Calif Santa Barbara, Mat Dept, Santa Barbara, CA 93106 USA

[2] Univ Calif Santa Barbara, Dept Elect & Comp Engn, Santa Barbara, CA 93106 USA

来源：

APPLIED PHYSICS LETTERS | 2021年 / 118卷 / 26期

关键词：

TUNNEL-JUNCTIONS; VOLTAGE; LEDS;

D O I：

10.1063/5.0054005

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We demonstrate efficient cascaded blue/green micro-size light-emitting diodes (mu LEDs) with independent junction control. The cascaded mu LEDs, consisted of blue mu LEDs, a tunnel junction, and green mu LEDs, were fully grown by metalorganic chemical vapor deposition. Blue, green, and blue/green emissions can be independently controlled in the same device. The blue mu LEDs (60x60 mu m(2)) and green mu LEDs (40x40 mu m(2)) exhibit a forward voltage of 4.1 and 3.1V at 20A/cm(2) and a high peak external quantum efficiency of 42% and 14%, respectively. This demonstration paves the way for monolithic integration of full color cascaded mu LEDs.

引用

页数：4

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