Junction Temperature in Ultraviolet Light-Emitting Diodes

2005 ◽  
Vol 44 (10) ◽  
pp. 7260-7266 ◽  
Author(s):  
Yangang Xi ◽  
Thomas Gessmann ◽  
Jingqun Xi ◽  
Jong Kyu Kim ◽  
Jay M. Shah ◽  
...  
Keyword(s):  
Ultraviolet Light ◽  
Light Emitting Diodes ◽  
Junction Temperature ◽  
Light Emitting ◽  
Ultraviolet Light Emitting Diodes

ACCURATE MEASUREMENT OF ULTRAVIOLET LIGHT-EMITTING DIODES

2021 ◽  
Author(s):  
C. Yuqin Zong ◽  
Cameron Miller
Keyword(s):  
Ultraviolet Light ◽  
Light Emitting Diodes ◽  
Luminous Flux ◽  
Junction Temperature ◽  
Integrating Sphere ◽  
Light Emitting ◽  
Type D ◽  
Uv Led ◽  
Uv Leds ◽  
Ultraviolet Light Emitting Diodes

We have developed a new calibration capability for 200 nm to 400 nm ultraviolet light-emitting diodes (UV LEDs) using a Type D gonio-spectroradiometer. The recently-introduced mean differential continuous pulse (M-DCP) method is used to overcome the measurement difficulty associated with the initial forward voltage, VF, anomaly of a UV LED, which makes it impossible to use VF to infer junction temperature, TJ, during pulsed operation. The new measurement facility was validated indirectly by comparing the measured total luminous flux of a white LED with that measured using the NIST’s 2.5 m absolute integrating sphere. The expanded calibration uncertainty for the total radiant flux is approximately 2 % to 3 % (k = 2) depending the wavelength of the UV LED.

Visible Luminescence of the InGaN/GaN Ultraviolet Light-emitting Diodes 365 nm

2017 ◽  
Vol 9 (5) ◽  
pp. 05031-1-05031-5 ◽  
Author(s):  
V. P. Veleschuk ◽  
◽  
A. I. Vlasenko ◽  
Z. K. Vlasenko ◽  
D. N. Khmil ◽  
...  
Keyword(s):  
Ultraviolet Light ◽  
Light Emitting Diodes ◽  
Light Emitting ◽  
Visible Luminescence ◽  
Ultraviolet Light Emitting Diodes

scholarly journals Graphene-Based Transparent Conducting Substrates for GaN/AlGaN Nanocolumn Flip-Chip Ultraviolet Light-Emitting Diodes

2021 ◽  
Author(s):  
Andreas Liudi Mulyo ◽  
Anjan Mukherjee ◽  
Ida Marie Høiaas ◽  
Lyubomir Ahtapodov ◽  
Tron Arne Nilsen ◽  
...  
Keyword(s):  
Ultraviolet Light ◽  
Flip Chip ◽  
Light Emitting Diodes ◽  
Light Emitting ◽  
Transparent Conducting ◽  
Ultraviolet Light Emitting Diodes
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