InGaN-Based Near-Ultraviolet and Blue-Light-Emitting Diodes with High External Quantum Efficiency Using a Patterned Sapphire Substrate and a Mesh Electrode

2002 ◽  
Vol 41 (Part 2, No. 12B) ◽  
pp. L1431-L1433 ◽  
Author(s):  
Motokazu Yamada ◽  
Tomotsugu Mitani ◽  
Yukio Narukawa ◽  
Shuji Shioji ◽  
Isamu Niki ◽  
...  
Keyword(s):  
Blue Light ◽  
Quantum Efficiency ◽  
Sapphire Substrate ◽  
External Quantum Efficiency ◽  
Light Emitting Diodes ◽  
Patterned Sapphire Substrate ◽  
Light Emitting ◽  
Near Ultraviolet

scholarly journals En Route to High External Quantum Efficiency (∼12%), Organic True-Blue-Light-Emitting Diodes Employing Novel Design of Iridium (III) Phosphors

2009 ◽  
Vol 21 (21) ◽  
pp. 2221-2225 ◽  
Author(s):  
Yuan-Chieh Chiu ◽  
Jui-Yi Hung ◽  
Yun Chi ◽  
Chung-Chia Chen ◽  
Chih-Hao Chang ◽  
...  
Keyword(s):  
Blue Light ◽  
Quantum Efficiency ◽  
External Quantum Efficiency ◽  
Light Emitting Diodes ◽  
Light Emitting ◽  
True Blue ◽  
Novel Design

ZnS blue‐light‐emitting diodes with an external quantum efficiency of 5×10−4

1975 ◽  
Vol 27 (12) ◽  
pp. 697-699 ◽  
Author(s):  
Hirohiko Katayama ◽  
Shunri Oda ◽  
Hiroshi Kukimoto
Keyword(s):  
Blue Light ◽  
Quantum Efficiency ◽  
External Quantum Efficiency ◽  
Light Emitting Diodes ◽  
Light Emitting

Round Holes Pattern Design on Patterned Sapphire Substrate of GaN-Based LEDs

2013 ◽  
Vol 321-324 ◽  
pp. 474-477
Author(s):  
Xin Yu Yu ◽  
Jun Zhang ◽  
Zhe Chen ◽  
Meng Yuan Xie ◽  
Jian Hui Yu ◽  
...  
Keyword(s):  
Quantum Efficiency ◽  
Sapphire Substrate ◽  
External Quantum Efficiency ◽  
Light Emitting Diode ◽  
Maximum Enhancement ◽  
Pattern Design ◽  
Patterned Sapphire Substrate ◽  
Light Emitting ◽  
Simulation Results

Patterned sapphire substrate (PSS) is effective approach to improve external quantum efficiency of light emitting diode (LED) chip. The round holes pattern was studied in this paper. Simulation was used to study how external quantum efficiency changes in different parameters of the round holes for flip GaN-based LEDs fabricated round holes PSS. Through a series of comparisons on simulation results, the maximum enhancement of LED’s external quantum efficiency is 15% compared to the external quantum efficiency of non-patterned sapphire substrate (non-PSS) LED for a most effective pattern.

Silicon carbide blue light emitting diodes with improved external quantum efficiency

1982 ◽  
Vol 53 (10) ◽  
pp. 6962-6967 ◽  
Author(s):  
L. Hoffmann ◽  
G. Ziegler ◽  
D. Theis ◽  
C. Weyrich
Keyword(s):  
Silicon Carbide ◽  
Blue Light ◽  
Quantum Efficiency ◽  
External Quantum Efficiency ◽  
Light Emitting Diodes ◽  
Light Emitting
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