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Characterization and simulation of liquid phase exfoliated graphene-based films for heat spreading applications

Yong Zhang (Institutionen för mikroteknologi och nanovetenskap, Elektronikmaterial och system ) ; Michael Edwards (Institutionen för mikroteknologi och nanovetenskap, Elektronikmaterial och system ) ; Majid Kabiri Samani (Institutionen för mikroteknologi och nanovetenskap, Elektronikmaterial och system ) ; Nikolaos Logothetis (Institutionen för mikroteknologi och nanovetenskap, Elektronikmaterial och system ) ; Li-Lei Ye ; Yifeng Fu (Institutionen för mikroteknologi och nanovetenskap, Elektronikmaterial och system ) ; Kjell Jeppson (Institutionen för mikroteknologi och nanovetenskap, Elektronikmaterial och system ) ; Johan Liu (Institutionen för mikroteknologi och nanovetenskap, Elektronikmaterial och system )
Carbon (0008-6223). Vol. 106 (2016), p. 195-201.
[Artikel, refereegranskad vetenskaplig]

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.



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Denna post skapades 2016-05-11. Senast ändrad 2016-08-10.
CPL Pubid: 236351

 

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Institutioner (Chalmers)

Institutionen för mikroteknologi och nanovetenskap, Elektronikmaterial och system

Ämnesområden

Produktion
Nanoteknik

Chalmers infrastruktur

 


Projekt

Denna publikation är ett resultat av följande projekt:


Carbon Based Smart Systems for Wireless Applications (NANO RF) (EC/FP7/318352)