TY - JOUR
T1 - An improved GaN-based light-emitting diode with a SiO2 current blocking layer embedded in stair-like AZO transparent structure
AU - Liou, Syuan Hao
AU - Tsai, Jung Hui
AU - Liu, Wen Chau
AU - Lin, Pao Sheng
AU - Chen, Yu Chi
N1 - Funding Information:
This work is supported by the Ministry of Science and Technology of the Republic of China under Contract Nos. MOST 106-2221-E-017-011 and 104-2221-E-017-007-MY2.
Publisher Copyright:
© 2017 The Electrochemical Society. All rights reserved.
PY - 2017
Y1 - 2017
N2 - In this article, in order to enhance the optical characteristics, GaN-based light-emitting diodes (LEDs) with SiO2 current blocking layer and stair-like aluminum-doped zinc oxide (AZO) transparent layers are fabricated and demonstrated. The characteristics of the LEDs with a planner AZO transparent layer, a SiO2 current blocking layer embedded in planner AZO transparent layer and a stair-like AZO transparent structure, and a SiO2 current blocking layer embedded in stair-like AZO transparent structure are comparatively studied. Experimental results exhibit that the current crowding effect can be effectively improved and it shows the best optical characteristics for the use of a SiO2 current blocking layer embedded in the stair-like transparent structure. At current level of 20 mA, it exhibits the improvements by 17.37%, 37.9%, and 26.3% in light output power, external extraction efficiency, and wall-plug efficiency, as compared to the conventional device with a planner transparent layer.
AB - In this article, in order to enhance the optical characteristics, GaN-based light-emitting diodes (LEDs) with SiO2 current blocking layer and stair-like aluminum-doped zinc oxide (AZO) transparent layers are fabricated and demonstrated. The characteristics of the LEDs with a planner AZO transparent layer, a SiO2 current blocking layer embedded in planner AZO transparent layer and a stair-like AZO transparent structure, and a SiO2 current blocking layer embedded in stair-like AZO transparent structure are comparatively studied. Experimental results exhibit that the current crowding effect can be effectively improved and it shows the best optical characteristics for the use of a SiO2 current blocking layer embedded in the stair-like transparent structure. At current level of 20 mA, it exhibits the improvements by 17.37%, 37.9%, and 26.3% in light output power, external extraction efficiency, and wall-plug efficiency, as compared to the conventional device with a planner transparent layer.
UR - http://www.scopus.com/inward/record.url?scp=85033787665&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85033787665&partnerID=8YFLogxK
U2 - 10.1149/2.0231709jss
DO - 10.1149/2.0231709jss
M3 - Article
AN - SCOPUS:85033787665
SN - 2162-8769
VL - 6
SP - R149-R153
JO - ECS Journal of Solid State Science and Technology
JF - ECS Journal of Solid State Science and Technology
IS - 10
ER -