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Large Reduction of Hot Spot Temperature in Graphene Electronic Devices with Heat-Spreading Hexagonal Boron Nitride.
| Content Provider | Semantic Scholar |
|---|---|
| Author | Choi, Doo Sung Poudel, Nirakar Park, Saungeun Akinwande, Deji Cronin, Stephen B. Watanabe, Kenji Taniguchi, Takashi Yao, Zhen Dong Shi, Li |
| Copyright Year | 2018 |
| Abstract | Scanning thermal microscopy measurements reveal a significant thermal benefit of including a high thermal conductivity hexagonal boron nitride (h-BN) heat-spreading layer between graphene and either a SiO2/Si substrate or a 100 μm thick Corning flexible Willow glass (WG) substrate. At the same power density, an 80 nm thick h-BN layer on the silicon substrate can yield a factor of 2.2 reduction of the hot spot temperature, whereas a 35 nm thick h-BN layer on the WG substrate is sufficient to obtain a factor of 4.1 reduction. The larger effect of the h-BN heat spreader on WG than on SiO2/Si is attributed to a smaller effective heat transfer coefficient per unit area for three-dimensional heat conduction into the thick, low-thermal conductivity WG substrate than for one-dimensional heat conduction through the thin oxide layer on silicon. Consequently, the h-BN lateral heat-spreading length is much larger on WG than on SiO2/Si, resulting in a larger degree of temperature reduction. |
| Starting Page | 11101 |
| Ending Page | 11107 |
| Page Count | 7 |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | https://cpb-us-e1.wpmucdn.com/sites.usc.edu/dist/7/89/files/2018/03/142-1hipi9f.pdf |
| PubMed reference number | 29528211v1 |
| Alternate Webpage(s) | https://doi.org/10.1021/acsami.7b16634 |
| DOI | 10.1021/acsami.7b16634 |
| Journal | ACS applied materials & interfaces |
| Volume Number | 10 |
| Issue Number | 13 |
| Language | English |
| Access Restriction | Open |
| Subject Keyword | Boron trifluoride:MCnc:Pt:Air:Qn Coefficient Differential Thermal Analysis Eighty Glass Ionomer Cements Granulomatosis with polyangiitis Graphene Large Radionuclide Imaging Silicon Small boron nitride |
| Content Type | Text |
| Resource Type | Article |
