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A comparative study on the junction temperature measurements of LEDs with raman spectroscopy, microinfrared (IR) imaging, and Forward voltage methods
Tamdoğan, Enes; Pavlidis, G.; Graham, S.; Arık, Mehmet (IEEE, 2018-11)Energy efficiency, long life, exceptional color, and performance of solid-state light sources have resulted in a rapidly increasing trend in a number of practical applications especially for general lighting after a long ... -
Direct liquid cooling of high flux LED systems: hot spot abatement
Tamdoğan, Enes; Arık, Mehmet; Doğruöz, M. B. (ASME, 2013)With the recent advances in wide band gap device technology, solid-state lighting (SSL) has become favorable for many lighting applications due to energy savings, long life, green nature for environment, and exceptional ... -
Effect of direct liquid cooling on light emitting diode local hot spots: Natural convection immersion cooling
Tamdoğan, Enes; Arık, Mehmet (Begell House Inc., 2014)The increased popularity of solid state systems with the technological developments have led them to be a favorable choice for many lighting applications besides electronics. However, the development of denser high lumen ... -
Effect of direct liquid cooling on the light emitting diode local hot spots? A computational and experimental study
Tamdoğan, Enes; Arık, Mehmet (Begell House Inc, 2014)The increased popularity of solid state systems with the technological developments have led them to be a favorable choice for many lighting applications besides electronics. However, the development of denser high lumen ... -
Immersion cooling of suspended and coated nano-phosphor particles for extending the limits of optical extraction of light emitting diodes
Tamdoğan, Enes (2017-08)Energy efficiency, long life, exceptional color and performance of solid-state light (SSL) sources have resulted in a rapidly increasing trend in a number of practical applications especially for general lighting after a ... -
Impact of junction temperature over forward voltage drop for red, blue and green high power light emitting diode chips
Muslu, Ahmet Mete; Özlük, Burak; Tamdoğan, Enes; Arık, Mehmet (IEEE, 2017)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 ... -
Natural convection immersion cooling with enhanced optical performance of light-emitting diode systems
Tamdoğan, Enes; Arık, Mehmet (2015-10-15)Electronics driven at high currents may experience local hot spots, which may cause thermal degradation or even catastrophic failures. This common problem occurs at light-emitting diode (LED) chips and it is not easily ... -
Thermal and optical performance of eco-friendly silk fibroin proteins as a cavity encapsulation over LED systems
Yuruker, Sevket Umut; Arık, Mehmet; Tamdoğan, Enes; Melikov, R.; Nizamoğlu, Sedat; Press, D. A.; Durak, Ilkem (ASME, 2015)The demand for high power LEDs for illumination applications is increasing. LED package encapsulation is one of most critical materials that affect the optical path of the generated light by LEDs, and may result in lumen ... -
Thermal enhancement of an LED light engine for automotive exterior lighting with advanced heat spreader technology
Uras, Umut Zeynep; Tamdoğan, Enes; Arık, Mehmet (ASME, 2016)In recent years, light emitting diodes (LEDs) have become an attractive technology for general and automotive illumination systems. LEDs have been preferable for automobile lighting due to its numerous advantages such as ... -
Thermal performance of a light emitting diode light engine for a multipurpose automotive exterior lighting system with competing board technologies
Uras, Umut Zeynep; Arık, Mehmet; Tamdoğan, Enes (ASME, 2017-06-12)In recent years, light emitting diodes (LEDs) have become an attractive technology for general and automotive illumination systems replacing old-fashioned incandescent and halogen systems. LEDs are preferable for automobile ...
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