scholarly journals Efficiency retention at high current injection levels in m -plane InGaN light emitting diodes

2010 ◽  
Author(s):  
X. Li ◽  
X. Ni ◽  
J. Lee ◽  
M. Wu ◽  
Ü, Özgür ◽  
...  
Keyword(s):  
Light Emitting Diodes ◽  
Current Injection ◽  
High Current ◽  
Light Emitting

scholarly journals Size-Dependent Quantum Efficiency of Flip-Chip Light-Emitting Diodes at High Current Injection Conditions

Photonics ◽  
2021 ◽  
Vol 8 (4) ◽  
pp. 88
Author(s):  
Xingfei Zhang ◽  
Yan Li ◽  
Zhicong Li ◽  
Zhenlin Miao ◽  
Meng Liang ◽  
...  
Keyword(s):  
Quantum Efficiency ◽  
Current Density ◽  
Flip Chip ◽  
Light Emitting Diodes ◽  
Light Output ◽  
Current Injection ◽  
High Current ◽  
High Quantum Efficiency ◽  
Light Emitting ◽  
Size Dependent

Versatile applications call for InGaN-based light-emitting diodes (LEDs) to operate at ultra-high current densities with high quantum efficiency. In this work, we investigated the size-dependent effects of the electrical and optical performance of LEDs as increasing the current density up to 100 A/cm2, which demonstrated that mini-strip flip-chip LEDs were superior option to achieve better performance. In detail, at a current density of 100 A/cm2, the light output power density of these mini-strip LEDs was improved by about 6.1 W/cm2, leading to an improvement in the wall-plug efficiency by 4.23%, while the operating temperature was reduced by 11.3 °C, as compared with the large-sized LEDs. This could be attributed to the increase in the sidewall light extraction, alleviated current crowding effect, and improved heat dissipation. This work suggests an array of mini-strip LEDs would provide an option in achieving higher luminescent efficiency at ultrahigh current injection conditions for various applications.

Modified Shockley Equation for GaInN-Based Light-Emitting Diodes: Origin of the Power- Efficiency Degradation Under High Current Injection

2019 ◽  
Vol 55 (4) ◽  
pp. 1-11 ◽  
Author(s):  
Dong-Pyo Han ◽  
Dong-Soo Shin ◽  
Jong-In Shim ◽  
Satoshi Kamiyama ◽  
Tetsuya Takeuchi ◽  
...  
Keyword(s):  
Power Efficiency ◽  
Light Emitting Diodes ◽  
Current Injection ◽  
High Current ◽  
Light Emitting

scholarly journals Efficiency retention at high current injection levels in m-plane InGaN light emitting diodes

2009 ◽  
Vol 95 (12) ◽  
pp. 121107 ◽  
Author(s):  
X. Li ◽  
X. Ni ◽  
J. Lee ◽  
M. Wu ◽  
Ü. Özgür ◽  
...  
Keyword(s):  
Light Emitting Diodes ◽  
Current Injection ◽  
High Current ◽  
Light Emitting

Luminance and current distribution of hybrid circular GaN-based resonant-cavity light-emitting diodes with lateral current injection on the n- and p-side

2014 ◽  
Vol 11 (3-4) ◽  
pp. 817-820
Author(s):  
Thorsten Passow ◽  
Michael Kunzer ◽  
Paul Börner ◽  
Wilfried Pletschen ◽  
Klaus Köhler ◽  
...  
Keyword(s):  
Current Distribution ◽  
Light Emitting Diodes ◽  
Resonant Cavity ◽  
Current Injection ◽  
Light Emitting ◽  
Lateral Current

Current injection efficiency induced efficiency-droop in InGaN quantum well light-emitting diodes

2010 ◽  
Vol 54 (10) ◽  
pp. 1119-1124 ◽  
Author(s):  
Hongping Zhao ◽  
Guangyu Liu ◽  
Ronald A. Arif ◽  
Nelson Tansu
Keyword(s):  
Quantum Well ◽  
Light Emitting Diodes ◽  
Current Injection ◽  
Efficiency Droop ◽  
Injection Efficiency ◽  
Light Emitting

Highly efficient bluish green organic light-emitting diodes of iridium(iii) complexes with low efficiency roll-off

2018 ◽  
Vol 47 (22) ◽  
pp. 7587-7593 ◽  
Author(s):  
Ning Su ◽  
Zheng-Guang Wu ◽  
You-Xuan Zheng
Keyword(s):  
Current Efficiency ◽  
External Quantum Efficiency ◽  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
High Current ◽  
High Current Efficiency ◽  
Light Emitting ◽  
Organic Light ◽  
Bluish Green ◽  
Low Efficiency

Two efficient bluish green iridium(iii) complexes were applied as emitters in the organic light-emitting diodes, which showing high current efficiency of 58.17 cd A−1 and external quantum efficiency of 25.33% with low efficiency roll-off.

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