Multifunctionalgraphenefilled silicone encapsulant for high-performance light-emitting diodes. (June 2016)

• Record Type: Journal Article
• Authors: Gao, Jie; Bao, Feng; Wu, Qiangxian; Ma, Rui; Han, Xiaobing; Jin, Danping; Chen, Kaiyue; He, Junying; Guo, Zhongfa; Yan, Chunjie
• Is Part Of: Materials today communications. Volume 7(2016)
• Page Start: 149
• Page End: 154
• Publication Date: 2016-06
• Subjects: Graphene -- Silicone resin -- Encapsulant -- Property; Materials science -- Periodicals; 620.11
• DOI: 10.1016/j.mtcomm.2016.04.010
• Languages: English
• ISSNs: 2352-4928

Abstract

Graphical abstract: Abstract: Graphene is well-dispersed into a silicone encapsulant of a light-emitting diode (LED) through a simple solvent-exchange method. The embedded graphene sheets play a multifunctional role in producing a high-performance encapsulant. Compared with pure silicone encapsulant, the tensile strength of the graphene-based materials significantly increased by 46% and elongation at break decreased only by 7% with the incorporation of 0.1 wt% graphene. Furthermore, the presence of graphene can absorb twice as much UV light as pure silicone, which can protect chip and encapsulant. High transmittance values (>90%) were achieved over 400–800 nm for 5 mm-thick encapsulant film containing 0.01 wt% graphene. The refractive index, thermal stability, and dimensional stability also dramatically increased. Owing to their multifunctionality, these hybrid materials are feasible candidates for LED encapsulation.