Carrier overflow in InGaN/GaN light-emitting diodes investigated by temperature-dependent short-circuit current characteristics

2015 ◽  
Author(s):  
Dong-Kuk Youn ◽  
Gyeong Won Lee ◽  
Jong-In Shim ◽  
Dong-Soo Shin
Keyword(s):  
Light Emitting Diodes ◽  
Short Circuit ◽  
Short Circuit Current ◽  
Temperature Dependent ◽  
Light Emitting ◽  
Current Characteristics

scholarly journals Investigation of Forward Tunneling Characteristics of InGaN/GaN Blue Light-Emitting Diodes on Freestanding GaN Detached from a Si Substrate

Nanomaterials ◽  
2018 ◽  
Vol 8 (7) ◽  
pp. 543 ◽  
Author(s):  
Moonsang Lee ◽  
Hyunkyu Lee ◽  
Keun Song ◽  
Jaekyun Kim
Keyword(s):  
Leakage Current ◽  
Blue Light ◽  
Light Emitting Diodes ◽  
Forward Bias ◽  
Si Substrate ◽  
Temperature Dependent ◽  
Light Emitting ◽  
Current Voltage ◽  
Current Characteristics ◽  
Recombination Current

We report forward tunneling characteristics of InGaN/GaN blue light emitting diodes (LEDs) on freestanding GaN detached from a Si substrate using temperature-dependent current–voltage (T-I-V) measurements. T-I-V analysis revealed that the conduction mechanism of InGaN/GaN LEDs using the homoepitaxial substrate can be distinguished by tunneling, diffusion and recombination current, and series resistance regimes. Their improved crystal quality, inherited from the nature of homoepitaxy, resulted in suppression of forward leakage current. It was also found that the tunneling via heavy holes in InGaN/GaN LEDs using the homoepitaxial substrate can be the main transport mechanism under low forward bias, consequentially leading to the improved forward leakage current characteristics.

scholarly journals Temperature-Dependent Internal Quantum Efficiency of Blue High-Brightness Light-Emitting Diodes

2014 ◽  
Vol 50 (11) ◽  
pp. 911-920 ◽  
Author(s):  
Ilya E. Titkov ◽  
Sergey Yu. Karpov ◽  
Amit Yadav ◽  
Vera L. Zerova ◽  
Modestas Zulonas ◽  
...  
Keyword(s):  
Quantum Efficiency ◽  
Light Emitting Diodes ◽  
Internal Quantum Efficiency ◽  
Temperature Dependent ◽  
High Brightness ◽  
Light Emitting

Protection Coordination of 33/11 kV Power Distribution Substation in Iraq

2021 ◽  
Vol 39 (5A) ◽  
pp. 723-737
Author(s):  
Yamur M. Obied ◽  
Thamir M. Abdul Wahhab
Keyword(s):  
Time Delay ◽  
Power System ◽  
Power Distribution ◽  
Software Package ◽  
Short Circuit ◽  
Distribution Network ◽  
Circuit Breaker ◽  
Short Circuit Current ◽  
Earth Fault ◽  
Current Characteristics

The coordination between protective devices is the process of determining the most appropriate timing of power interruption during abnormal conditions in the power system. The aim of this work is to coordinate the protection of the 33/11 kV power distribution substation in Iraq using the CYME 7.1 software package. In this paper overcurrent and earth fault relays are simulated in two cases, with time delay setting and instantaneous setting, to obtain the Time Current Characteristics (TCC) curves for each Circuit Breaker (CB) relay of Al-Karama substation (2×31.5 MVA, 33/11 kV) in Babil distribution network. The short circuit current at each CB is calculated and accordingly, the protection coordination for Al-Karama substation has been simulated. The TCC curves have been obtained in two cases for overcurrent and earth fault relays; in a case with time delay setting and in the case with the instantaneous setting. The setting takes into consideration the short circuit current at the furthest point of the longest outgoing feeder and the shortest outgoing feeder.

Temperature-dependent efficiency droop behaviors of GaN-based green light-emitting diodes

2013 ◽  
Vol 22 (4) ◽  
pp. 047805 ◽  
Author(s):  
Rong Jiang ◽  
Hai Lu ◽  
Dun-Jun Chen ◽  
Fang-Fang Ren ◽  
Da-Wei Yan ◽  
...  
Keyword(s):  
Light Emitting Diodes ◽  
Green Light ◽  
Efficiency Droop ◽  
Temperature Dependent ◽  
Light Emitting

Impact of temperature-dependent hole injection on low-temperature electroluminescence collapse in ultraviolet light-emitting diodes

2012 ◽  
Vol 101 (25) ◽  
pp. 253512 ◽  
Author(s):  
Craig G. Moe ◽  
Gregory A. Garrett ◽  
Paul Rotella ◽  
Hongen Shen ◽  
Michael Wraback ◽  
...  
Keyword(s):  
Low Temperature ◽  
Ultraviolet Light ◽  
Light Emitting Diodes ◽  
Hole Injection ◽  
Temperature Dependent ◽  
Light Emitting ◽  
Ultraviolet Light Emitting Diodes

scholarly journals Temperature dependent carrier localization in AlGaInN near-ultraviolet light-emitting diodes

2016 ◽  
Vol 24 (11) ◽  
pp. 11594 ◽  
Author(s):  
Hongwei Wang ◽  
Yue Lin ◽  
Lihong Zhu ◽  
Yijun Lu ◽  
Yi Tu ◽  
...  
Keyword(s):  
Ultraviolet Light ◽  
Light Emitting Diodes ◽  
Carrier Localization ◽  
Temperature Dependent ◽  
Light Emitting ◽  
Near Ultraviolet ◽  
Ultraviolet Light Emitting Diodes

Temperature Dependent Electrical Properties of Organic Light-Emitting Diodes Using a Zn Complex

2010 ◽  
Vol 10 (5) ◽  
pp. 3304-3307
Author(s):  
Dong-Eun Kim ◽  
Gyu-Chae Choi ◽  
Jun-Woo Park ◽  
Byoung-Sang Kim ◽  
Burm-Jong Lee ◽  
...  
Keyword(s):  
Electrical Properties ◽  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Temperature Dependent ◽  
Light Emitting ◽  
Organic Light
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