Enhancement of heat dissipation of LED module with cupric-oxide composite coating on aluminum-alloy heat sink. (December 2015)

• Record Type: Journal Article
• Authors: Kim, Donghyun; Lee, Junghoon; Kim, Junho; Choi, Chang-Hwan; Chung, Wonsub
• Is Part Of: Energy conversion and management. Volume 106(2016)
• Page Start: 958
• Page End: 963
• Publication Date: 2015-12
• Subjects: Aluminum -- Composites -- Coatings -- Radiation -- Dissipation; Direct energy conversion -- Periodicals; Energy storage -- Periodicals; Energy transfer -- Periodicals; Énergie -- Conversion directe -- Périodiques; Direct energy conversion; Periodicals; 621.3105
• DOI: 10.1016/j.enconman.2015.10.049
• Languages: English
• ISSNs: 0196-8904

Abstract

Highlights: We fabricate the CuO/resin composite coating layer on aluminum alloy heat sink. CuO/resin coating considerably improved the surface emissivity. The LED junction temperature was reduced by CuO/resin coated heat sink. The thermal resistance of heat sink was decreased by CuO/resin composite coating at 200 μm thickness. Abstract: A composite coating composed of cupric oxide (CuO) and silicon-based resin was applied to an aluminum-alloy heat sink for a light emitting diode (LED) module. The purpose of the composite coating is to improve the heat dissipation performance of heat sink by enhancing thermal radiation emission. The heat dissipation performance was investigated in terms of LED junction temperature and thermal resistance using a thermal transient method. The CuO and silicon-based resin composite coating showed higher emissivity, and the lower junction temperature and thermal resistance of the heat sink was achieved. In addition, a continuous operation test of the LED chip with the heat sink revealed that the surface treated with the CuO composite coating stably dissipated heat without degradation. In conclusion, the composite coating proposed here showed a significant improvement of the heat dissipation performance of the aluminum-alloy heat sink due to the enhanced thermal radiation property.