Application of micro/nano technology for thermal management of high power LED packaging - A review

With technological progress, the request for high power LEDs (HP-LEDs) as a replacement candidate for common lamp is increased. Due to dissipation of 70-85% of LED input power in form of heat, thermal management of LED packaging is unavoidable. A review of the literature related to thermal management of HP-LED based on the different materials and fabrication methods are used in LED packaging structure to provide a concise overview of the recent advances in this field of study. In this paper, different materials of LED packaging through the heat dissipation path, from LED chip until heat sink are evaluated by details. The state-of-the-art of micro/nano technology-based thermal solutions for three levels of (a) LED chip, (b) submount, and (c) carrier substrate are addressed. The fundamental of introduced thermal management solutions are material-based and fabrication-based solutions.