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Interfacial Thermal Conductance between Mechanically Exfoliated Black Phosphorus and SiOx : Effect of Thickness and Temperature

Journal Article · · Advanced Materials Interfaces
 [1];  [2];  [2];  [3];  [2];  [2]
  1. Iowa State Univ., Ames, IA (United States); DOE/OSTI
  2. Iowa State Univ., Ames, IA (United States)
  3. Shanghai Univ. of Engineering Science, Shanghai (China)
Black phosphorus (BP) is one of new 2D materials that have attracted wide attention. This work reports the interfacial thermal conductance between BP flake and SiOx using Raman spectroscopy. From 293 K down to the 223 K, eight BP flakes in a thickness range of 16.6–113.7 nm are characterized. At 293 K, the largest interfacial thermal conductance is 1.14 × 108 W m−2 K−1 for a 82.1 nm thick BP flake, and the smallest one is 2.17 × 107 W m−2 K−1 for a 26.6 nm thick BP flake. Such large interfacial thermal conductance can be attributed to the excellent interface contact and strong phonon coupling between BP and SiOx. Furthermore, the measured interfacial thermal conductance has a one‐fold up to around four‐fold increase with decreased temperature from 293 to 223 K, which is a result of thermal‐expansion‐mismatch induced variation in the morphology of BP flakes. Additionally, it demonstrates no thickness‐dependent behavior. It is speculated the intrinsic thickness dependence is weak and is overshadowed by the large variation in the interface contact of different samples. As a new 2D material, BP shows great potential to be a thermal interface material for heat dissipation in electronics.
Research Organization:
Iowa State Univ., Ames, IA (United States)
Sponsoring Organization:
Iowa Energy Center; National Science Foundation (NSF); USDOE; USDOE Office of Energy Efficiency and Renewable Energy (EERE)
Grant/Contract Number:
EE0007686; NE0000671
OSTI ID:
1533051
Alternate ID(s):
OSTI ID: 1376746
Journal Information:
Advanced Materials Interfaces, Journal Name: Advanced Materials Interfaces Journal Issue: 16 Vol. 4; ISSN 2196-7350
Publisher:
Wiley-VCHCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (3)

Impact of Nanoscale Roughness on Heat Transport across the Solid–Solid Interface journal December 2019
Nonmonotonic thickness-dependence of in-plane thermal conductivity of few-layered MoS 2 : 2.4 to 37.8 nm journal January 2018
Size-dependent interface thermal conductance in black phosphorus/SiO 2 heterojunctions journal November 2018

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