Investigation of the optical properties of ZnO/epoxy resin nanocomposite: Application in the LED

• Published in: 2012 13th International Conference on Electronic Packaging Technology & High Density Packaging pp. 376 - 379
• Main Authors: Chongnan Peng, Guoping Zhang, Rong Sun, Wong, C. P.
• Format: Conference Proceeding
• Language: English
• Published: IEEE 01-08-2012
• Subjects: Abstracts; Irrigation; Materials reliability; Optical films; Optical filters; Polymers; Zinc oxide
• ISBN: 9781467316828; 1467316822
• DOI: 10.1109/ICEPT-HDP.2012.6474638

With development of high-power white light LED, people pay more attention to the reliability and security of packaging materials. Epoxy resins, as a main material for LED potting compound, remains to improve its thermal conductivity and ultraviolet shielding efficiency. ZnO nanoparticles were found to be well in ultraviolet (UV)-absorption and good conductor of heat. In the present work, The ZnO nanoparticles were prepared by simple precipitation and calcination, presented high visible-light transparency and well ultraviolet shielding at low concentration. The ZnO/epoxy nanocomposite solution was prepared by mixing ZnO powders with epoxy resins using the ultrasonic technique, and then the composite film was prepared by spin-coating technique. The results indicated that the ZnO/epoxy nanocomposite film kept high visible transparency and high ultraviolet shielding at the condition of 5wt% addition. The ZnO nanoparticles obviously enhanced UV-shielding efficiency of the epoxy resins.