Sol-gel derived transparent zirconium-phenyl siloxane hybrid for robust high refractive index LED encapsulant

Yong Ho Kim; Jun-Young Bae; Jungho Jin; Byeong-Soo Bae

doi:10.1021/am500315y

Sol-gel derived transparent zirconium-phenyl siloxane hybrid for robust high refractive index LED encapsulant

ACS Appl Mater Interfaces. 2014 Mar 12;6(5):3115-21. doi: 10.1021/am500315y. Epub 2014 Feb 24.

Authors

Yong Ho Kim¹, Jun-Young Bae, Jungho Jin, Byeong-Soo Bae

Affiliation

¹ Laboratory of Optical Materials and Coating (LOMC) Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST) , Daejeon, Republic of Korea.

PMID: 24564295
DOI: 10.1021/am500315y

Abstract

We report a zirconium-phenyl siloxane hybrid material (ZPH) that can be used as a robust LED encapsulant. The ZPH encapsulant was fabricated via hydrosilylation-curing of sol-gel derived multifunctional (vinyl- and hydride-functions) siloxane resins containing phenyl-groups and Zr-O-Si heterometallic phase for achieving a high refractive index (n ≈ 1.58). In thermal aging, the ZPH LED encapsulant exhibited superior performances with a high optical transparency (∼88% at 450 nm) and exhibited high thermal stability (no yellowing at 180 °C for 1008 h), compared to a commercial LED encapsulant (OE-6630, Dow Corning Corporation). This suggests potential for ZPH to be a robust LED encapsulant.

Publication types

Research Support, Non-U.S. Gov't