Impact of junction temperature over forward voltage drop for red, blue and green high power light emitting diode chips

Name: Impact of junction temperature over forward voltage drop for red, blue and green high power light emitting diode chips
Author: Muslu, Ahmet Mete, Özlük, Burak, Tamdoğan, Enes, Arık, Mehmet

İsim	Impact of junction temperature over forward voltage drop for red, blue and green high power light emitting diode chips
Yazar	Muslu, Ahmet Mete, Özlük, Burak, Tamdoğan, Enes, Arık, Mehmet
Basım Tarihi:	2017
Basım Yeri	- IEEE
Konu	Junction temperature measurement, Forward voltage, RGB LEDs, Optical measurement, Wavelength shift
Tür	Belge
Dil	İngilizce
Dijital	Evet
Yazma	Hayır
Kütüphane:	Özyeğin Üniversitesi
Demirbaş Numarası	978-150902994-5
Kayıt Numarası	c10479e4-5888-402a-9708-3b2c78c81393
Lokasyon	Mechanical Engineering
Tarih	2017
Notlar	Due to copyright restrictions, the access to the full text of this article is only available via subscription.
Örnek Metin	Commercially available light emitting diodes (LEDs) that have high efficiencies and long lifetime are offered in advanced packaging technologies. Many cooling systems were developed for current LED systems that enable a better removal of heat than counterpart devices offered earlier this decade. On the other hand, these lighting systems are still producing a considerable amount of heat that is still not effectively removed. Especially, p-n junctions of LEDs are the most critical regions where a significant amount of heating occurs, and it is crucial to determine the temperature of this active region to meet the lumen extraction, color, light quality and lifetime goals. In literature, there are some proposed junction temperature measurement methods such as Peak Wavelength Shift, Thermal (Infrared) Imaging and Forward Voltage Change methods mostly focused on blue LEDs. In this study, we are studying three common types of LEDs (Red, Green, and Blue) and comparing their forward voltage drop (Vf) behaviors. A set of theoretical, computational and experimental studies have been performed. It is found that optical power change with temperature in red LEDs are much higher than blue and green chips. The green LED chip experienced the largest slope having the largest change in forward voltage compared to other LED chips.
DOI	10.1109/ITHERM.2017.7992599

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Impact of junction temperature over forward voltage drop for red, blue and green high power light emitting diode chips

Yazar Muslu, Ahmet Mete, Özlük, Burak, Tamdoğan, Enes, Arık, Mehmet

Basım Tarihi 2017

Basım Yeri - IEEE

Konu Junction temperature measurement, Forward voltage, RGB LEDs, Optical measurement, Wavelength shift

Tür Belge

Dil İngilizce

Dijital Evet

Yazma Hayır

Kütüphane Özyeğin Üniversitesi

Demirbaş Numarası 978-150902994-5

Kayıt Numarası c10479e4-5888-402a-9708-3b2c78c81393

Lokasyon Mechanical Engineering

Tarih 2017

Notlar Due to copyright restrictions, the access to the full text of this article is only available via subscription.

Örnek Metin Commercially available light emitting diodes (LEDs) that have high efficiencies and long lifetime are offered in advanced packaging technologies. Many cooling systems were developed for current LED systems that enable a better removal of heat than counterpart devices offered earlier this decade. On the other hand, these lighting systems are still producing a considerable amount of heat that is still not effectively removed. Especially, p-n junctions of LEDs are the most critical regions where a significant amount of heating occurs, and it is crucial to determine the temperature of this active region to meet the lumen extraction, color, light quality and lifetime goals. In literature, there are some proposed junction temperature measurement methods such as Peak Wavelength Shift, Thermal (Infrared) Imaging and Forward Voltage Change methods mostly focused on blue LEDs. In this study, we are studying three common types of LEDs (Red, Green, and Blue) and comparing their forward voltage drop (Vf) behaviors. A set of theoretical, computational and experimental studies have been performed. It is found that optical power change with temperature in red LEDs are much higher than blue and green chips. The green LED chip experienced the largest slope having the largest change in forward voltage compared to other LED chips.

DOI 10.1109/ITHERM.2017.7992599