An investigation into the optothermal behavior of a high power red light emitting diode: impact of an optical path

Name: An investigation into the optothermal behavior of a high power red light emitting diode: impact of an optical path
Author: Muslu, Ahmet Mete, Özlük, Burak, Arık, Mehmet

İsim	An investigation into the optothermal behavior of a high power red light emitting diode: impact of an optical path
Yazar	Muslu, Ahmet Mete, Özlük, Burak, Arık, Mehmet
Basım Tarihi:	2021-03
Basım Yeri	- ASME
Konu	Computational fluid dynamics (CFD), Forward voltage, Junction temperature measurement, LED dome, Monochromatic LEDs, Red LED, Thermal imaging
Tür	Süreli Yayın
Dil	İngilizce
Dijital	Evet
Yazma	Hayır
Kütüphane:	Özyeğin Üniversitesi
Demirbaş Numarası	1043-7398
Kayıt Numarası	f20ada05-394f-492c-a090-134a71fb0c9a
Lokasyon	Mechanical Engineering
Tarih	2021-03
Notlar	TÜBİTAK
Örnek Metin	Monochromatic light emitting diodes (LEDs) are getting more attention day by day for a very wide range of applications such as general lighting, signage, automotive lighting, display, water purification, and skin imaging. While they are taking place in a large number of applications, thermal challenges associated with the operation of LEDs have become a significant issue to address since their performance is greatly affected by thermal conditions. Thus, this study focuses on identifying thermal, optical, and electrical characteristics of an AlGaInP-based red LED considering the impact of the LED dome on the chip performance. The junction temperature measurement results obtained with forward voltage change method were validated with thermal imaging method (TIM) and computational models. It was observed that the LED dome may critically affect the thermal, optical, and electrical behaviors of the LED chip. In fact, a 3.7% increase in junction temperature and a 6.1% drop in optical conversion efficiency were found at the normal operation of the red LED after the LED dome was removed. The results were also compared with a blue LED, and lower junction temperatures were measured for the red LED at each driving current. The difference in junction temperature became even more noticeable at higher driving currents. Results have shown a good agreement between three different methods with a maximum variation of 6.9%.
DOI	10.1115/1.4047381
Cilt	143

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An investigation into the optothermal behavior of a high power red light emitting diode: impact of an optical path

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

Basım Tarihi 2021-03

Basım Yeri - ASME

Konu Computational fluid dynamics (CFD), Forward voltage, Junction temperature measurement, LED dome, Monochromatic LEDs, Red LED, Thermal imaging

Tür Süreli Yayın

Dil İngilizce

Dijital Evet

Yazma Hayır

Kütüphane Özyeğin Üniversitesi

Demirbaş Numarası 1043-7398

Kayıt Numarası f20ada05-394f-492c-a090-134a71fb0c9a

Lokasyon Mechanical Engineering

Tarih 2021-03

Notlar TÜBİTAK

Örnek Metin Monochromatic light emitting diodes (LEDs) are getting more attention day by day for a very wide range of applications such as general lighting, signage, automotive lighting, display, water purification, and skin imaging. While they are taking place in a large number of applications, thermal challenges associated with the operation of LEDs have become a significant issue to address since their performance is greatly affected by thermal conditions. Thus, this study focuses on identifying thermal, optical, and electrical characteristics of an AlGaInP-based red LED considering the impact of the LED dome on the chip performance. The junction temperature measurement results obtained with forward voltage change method were validated with thermal imaging method (TIM) and computational models. It was observed that the LED dome may critically affect the thermal, optical, and electrical behaviors of the LED chip. In fact, a 3.7% increase in junction temperature and a 6.1% drop in optical conversion efficiency were found at the normal operation of the red LED after the LED dome was removed. The results were also compared with a blue LED, and lower junction temperatures were measured for the red LED at each driving current. The difference in junction temperature became even more noticeable at higher driving currents. Results have shown a good agreement between three different methods with a maximum variation of 6.9%.

DOI 10.1115/1.4047381

Cilt 143