Photonics Research, 2019, 7 (2): 02000144, Published Online: May. 7, 2019
Efficient InGaN-based yellow-light-emitting diodes Download: 856次
Abstract
Realization of efficient yellow-light-emitting diodes (LEDs) has always been a challenge in solid-state lighting. Great effort has been made, but only slight advancements have occurred in the past few decades. After comprehensive work on InGaN-based yellow LEDs on Si substrate, we successfully made a breakthrough and pushed the wall-plug efficiency of 565-nm-yellow LEDs to 24.3% at 20 A / cm 2 and 33.7% at 3 A / cm 2 . The success of yellow LEDs can be credited to the improved material quality and reduced compressive strain of InGaN quantum wells by a prestrained layer and substrate, as well as enhanced hole injection by a 3D pn junction with V-pits.
Fengyi Jiang, Jianli Zhang, Longquan Xu, Jie Ding, Guangxu Wang, Xiaoming Wu, Xiaolan Wang, Chunlan Mo, Zhijue Quan, Xing Guo, Changda Zheng, Shuan Pan, Junlin Liu. Efficient InGaN-based yellow-light-emitting diodes[J]. Photonics Research, 2019, 7(2): 02000144.