Characterization and simulation of liquid phase exfoliated graphene-based films for heat spreading applications
Journal article, 2016

This paper concerns the thermal properties of graphene-based films for heat spreading applications. Following liquid phase exfoliation (LPE) films were made by two different methods, vacuum filtration and drop coating. Temperature decreases of up to 6 °C and 4 °C were measured at a heat flux density of 1200 W/cm2 for the vacuum filtrated and drop coated films respectively. For the first time in this paper, three different methods were combined to evaluate and predict the thermal performance of such graphene-based films. Resistance thermometers were used to monitor the hotspot temperature decrease versus the Joule heat flow as a result of using graphene-based heat spreaders. The 3ω method was used to experimentally determine the in-plane and through-plane thermal conductivities of such films. A finite element model of the hotspot test structure was setup using the in-plane and through-plane thermal conductivities (110 and 0.25 W/mK, respectively) obtained from the 3ω measurements. Simulations were performed to predict the hotspot temperature decrease with excellent agreement obtained between all methods. The results indicate that the alignment and purity of the graphene-based films, as well as their thermal boundary resistance with respect to the chip, are key parameters when determining the thermal performance of graphene-based heat spreaders.

Author

Yong Zhang

Chalmers, Microtechnology and Nanoscience (MC2), Electronics Material and Systems Laboratory

Michael Edwards

Chalmers, Microtechnology and Nanoscience (MC2), Electronics Material and Systems Laboratory

Kabir Majid Samani

Chalmers, Microtechnology and Nanoscience (MC2), Electronics Material and Systems Laboratory

Nikolaos Logothetis

Chalmers, Microtechnology and Nanoscience (MC2), Electronics Material and Systems Laboratory

Lilei Ye

SHT Smart High-Tech

Yifeng Fu

Chalmers, Microtechnology and Nanoscience (MC2), Electronics Material and Systems Laboratory

Kjell Jeppson

Chalmers, Microtechnology and Nanoscience (MC2), Electronics Material and Systems Laboratory

Johan Liu

Chalmers, Microtechnology and Nanoscience (MC2), Electronics Material and Systems Laboratory

Carbon

0008-6223 (ISSN)

Vol. 106 195-201

Carbon Based Smart Systems for Wireless Applications (NANO RF)

European Commission (FP7), 2012-09-01 -- 2015-08-31.

Areas of Advance

Production

Subject Categories

Nano Technology

DOI

10.1016/j.carbon.2016.05.014

More information

Latest update

9/21/2018