Thermal conductivity of individual single-crystalline F16CuPc nanoribbons

Abstract

Organic semiconductors are widely used in flexible electronics, optoelectronic devices, and thermoelectric systems. Among them, copper hexadecafluorophthalocyanine (F16CuPc), an n-type organic semiconductor, exhibits excellent chemical and thermal stability, making it suitable for a range of device applications. As device architectures scale down to the nanoscale, understanding the intrinsic thermal transport properties of such materials becomes critical for effective thermal management. In this work, we report the first thermal conductivity measurement of individual single-crystalline F16CuPc nanoribbons using a suspended thermometry platform. We integrated individual nanoribbons into our measurement platform and conducted temperature dependent measurements. The thermal conductivity trend indicates the crystalline status of the sample. All samples exhibit thermal conductivity values of nearly 0.3 W m-1 K-1 at room temperature, attributed to short phonon mean free paths and weak intermolecular interactions. Molecular dynamics simulations further support the experimental trends and reveal anisotropic thermal transport characteristics. These results provide valuable insights into heat conduction mechanisms in small-molecule organic semiconductors and offer guidance for thermal design in future nanoscale device integration.