Structural Characteristics of Phosphorus-Doped C₆₀ Thin Film Prepared by Radio Frequency-Plasma Assisted Thermal Evaporation Technique

Abstract

Phosphorus doped C60 (P:C60) thin films were prepared by a radio frequency plasma assisted thermal evaporation technique using C60 powder as a carbon source and a mixture of argon and phosphine (PH3) gas as a dopant precursor. The effects of the plasma power on the structural characteristics of the as-prepared films were then studied using Raman spectroscopy, Auger electron spectroscopy (AES) and X-ray photo-electrons spectroscopy (XPS). XPS and Auger analysis indicated that the films were mainly composed of C and P and that the concentration of P was proportional to the plasma power. The Raman results implied that the doped films contained a more disordered carbon structure than the un-doped samples. The P:C60 films were then used as a coating layer for the Si anodes of lithium ion secondary batteries. The cyclic voltammetry (CV) analysis of the P:C60 coated Si electrodes demonstrated that the P:C60 coating layer might be used to improve the transport of Li-ions at the electrode/electrolyte interface.

A polymerized C60 coating enhancing interfacial stability at three-dimensional LiCoO2 in high-potential regime

“…Comparing the intensity of the D (1458 cm À1 ) and G (1560 cm À1 ) band, one may conclude that the C 60 film is dominated by defects and therefore the plasma-polymerized C 60 thin film is found to be amorphous. This result is in good agreement with the XRD data and previous studies [23,24]. Fig.…”

Plasma-Doped Carbon-Based Anode Materials in Potassium Ion Batteries: A Review of Current and Future Prospects

“…According to their CV results, plasma thermal evaporation-prepared thin films of phosphorus-doped C60 (P:C60) on silicon particles support that P:C60 films are a suitable option as a coating material in anode stages. [32] Dou et al plasma-treated the prepared graphene composites stretcher-loaded with Co9S8 nanoparticles using NH3 as a gas source, which formed a partial etching on the surface of graphene and Co9S8 nanoparticles, as well as doped N into the composites. [33] Jun Kang et al prepared Li-doped carbon with high levels of Li doping (~4 wt%) in an organic solvent by dissolving Li precursors.…”