Low-resistance Al-based reflectors for high-power GaN-based flip-chip light-emitting diodes

2005 ◽  
Vol 86 (13) ◽  
pp. 133503 ◽  
Author(s):  
June-O Song ◽  
Woong-Ki Hong ◽  
Y. Park ◽  
J. S. Kwak ◽  
Tae-Yeon Seong
Nanomaterials ◽  
2019 ◽  
Vol 9 (8) ◽  
pp. 1178 ◽  
Author(s):  
Qiang Zhao ◽  
Jiahao Miao ◽  
Shengjun Zhou ◽  
Chengqun Gui ◽  
Bin Tang ◽  
...  

We demonstrate high-power GaN-based vertical light-emitting diodes (LEDs) (VLEDs) on a 4-inch silicon substrate and flip-chip LEDs on a sapphire substrate. The GaN-based VLEDs were transferred onto the silicon substrate by using the Au–In eutectic bonding technique in combination with the laser lift-off (LLO) process. The silicon substrate with high thermal conductivity can provide a satisfactory path for heat dissipation of VLEDs. The nitrogen polar n-GaN surface was textured by KOH solution, which not only improved light extract efficiency (LEE) but also broke down Fabry–Pérot interference in VLEDs. As a result, a near Lambertian emission pattern was obtained in a VLED. To improve current spreading, the ring-shaped n-electrode was uniformly distributed over the entire VLED. Our combined numerical and experimental results revealed that the VLED exhibited superior heat dissipation and current spreading performance over a flip-chip LED (FCLED). As a result, under 350 mA injection current, the forward voltage of the VLED was 0.36 V lower than that of the FCLED, while the light output power (LOP) of the VLED was 3.7% higher than that of the FCLED. The LOP of the FCLED saturated at 1280 mA, but the light output saturation did not appear in the VLED.


2005 ◽  
Vol 8 (11) ◽  
pp. G320 ◽  
Author(s):  
Woong-Ki Hong ◽  
June-O Song ◽  
Hyun-Gi Hong ◽  
Keun-Yong Ban ◽  
Takhee Lee ◽  
...  

2009 ◽  
Vol 48 (7) ◽  
pp. 070208 ◽  
Author(s):  
Christian Sommer ◽  
Joachim R. Krenn ◽  
Paul Hartmann ◽  
Peter Pachler ◽  
Marko Schweighart ◽  
...  

2003 ◽  
Vol 83 (24) ◽  
pp. 4990-4992 ◽  
Author(s):  
June-O Song ◽  
Dong-Seok Leem ◽  
J. S. Kwak ◽  
O. H. Nam ◽  
Y. Park ◽  
...  

2005 ◽  
Vol 39 (7) ◽  
pp. 851-855 ◽  
Author(s):  
D. A. Zakheim ◽  
I. P. Smirnova ◽  
I. V. Roznanskii ◽  
S. A. Gurevich ◽  
M. M. Kulagina ◽  
...  

2008 ◽  
Vol 104 (7) ◽  
pp. 074507 ◽  
Author(s):  
Ladislav Kuna ◽  
Anja Haase ◽  
Christian Sommer ◽  
Ernst Zinterl ◽  
Joachim R. Krenn ◽  
...  

2008 ◽  
Vol 55 (12) ◽  
pp. 3375-3382 ◽  
Author(s):  
Bingfeng Fan ◽  
Hao Wu ◽  
Yu Zhao ◽  
Yulun Xian ◽  
Baijun Zhang ◽  
...  

2015 ◽  
Vol 106 (3) ◽  
pp. 031101 ◽  
Author(s):  
Christophe A. Hurni ◽  
Aurelien David ◽  
Michael J. Cich ◽  
Rafael I. Aldaz ◽  
Bryan Ellis ◽  
...  

2007 ◽  
Vol 16 (4) ◽  
pp. 1135-1139 ◽  
Author(s):  
Zhang Jian-Ming ◽  
Zou De-Shu ◽  
Xu Chen ◽  
Zhu Yan-Xu ◽  
Liang Ting ◽  
...  

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