Title :
Transparent functionalized zinc oxide/epoxy nanocomposite with high thermal performance for high-power light-emitting diodes
Author :
Min Zhang ; Kai Zhang ; Xinfeng Zhang ; Chen Yang ; Yuen, Matthew Ming-Fai
Author_Institution :
Dept. of Mech. Eng., Hong Kong Univ. of Sci. & Technol., Kowloon, China
Abstract :
A series of environmentally friendly agents were adopted to functionalize ZnO nanoparticles under moderate conditions. The functionalized ZnO was used as filler of epoxy resin to prepare transparent die attach material. The results show that functionalizations with citric acid and D-gluconic acid greatly improve the dispersion of ZnO in epoxy due to their high chelating capacities with ZnO and good compatibilities with epoxy. The transmittance of nanocomposite for 450 nm visible-light was increased by 27% from 81% to 93% after functionalization with citric acid. The thermal conductivity of 0.2 wt.% citric acid-functionalized ZnO/epoxy nanocomposite is 1.3 times of that of 0.2 wt.% as-synthesized ZnO/epoxy nanocomposite.
Keywords :
II-VI semiconductors; filled polymers; nanocomposites; nanofabrication; nanoparticles; resins; thermal conductivity; transparency; visible spectra; wide band gap semiconductors; zinc compounds; D-gluconic acid; ZnO; chelating capacities; citric acid; dispersion; environmentally friendly agents; epoxy resin; filler; functionalized nanoparticles; high thermal performance; high-power light-emitting diodes; thermal conductivity; transmittance; transparent die attach material; transparent functionalized zinc oxide-epoxy nanocomposite; visible-light; wavelength 450 nm;
Conference_Titel :
Electronic Materials and Packaging (EMAP), 2012 14th International Conference on
Conference_Location :
Lantau Island
Print_ISBN :
978-1-4673-4945-1
Electronic_ISBN :
978-1-4673-4943-7
DOI :
10.1109/EMAP.2012.6507891
