Conjugated Small Molecule Crystals as A Coupling Layer Between Carbon-based Thermal Interface Materials and Heat Sink

Carbon-based thermal interface materials (TIMs) play a crucial role in maintaining the performance and reliability of electronic devices by improving their thermal management capabilities. Previous researchers have done a lot of work around improving the thermal conductivity of carbon-based TIMs themselves. However, as the thickness of thermal interface materials used has gradually decreased, researchers have gradually realized that the main bottleneck of heat transfer lies in reducing the interface thermal resistance between the carbon-based TIMs and the encapsulating shell or metal heat sink. In this work, we investigate the mechanism by which organic conjugated small molecule crystals reduce the interfacial thermal contact resistance between carbon-based TIMs and copper heat sink. By modulating the orientation of the organic conjugated small molecules, which have a π-π conjugated structure and a certain electron mobility, we have constructed a heat transfer channel at the interface, significantly enhancing the interfacial heat transfer and improving the overall heat dissipation performance of the device.