Electrochromic device plays a key role in energy efficiency management and modern display technology. As a cathodic coloration material, Nb₂O₅ is one of the important material used in the electrochromic device. The capacity of a layer is related with the intercalation and deintercalation behavior. Graphene Doping is a promising process for the high-capacity ion storage application. Graphene is a two-dimensional material and it possesses excellent mechanical and electrical properties. In this paper, graphene doped Nb₂O₅ thin films have been deposited onto ITO coated glass substrate by a thermionic vacuum arc (TVA) technique. The coloring efficiency has been calculated as 91 and 56 cm² C⁻¹ at 414 and 550 nm, respectively. The transmittance variation of graphene doped Nb₂O₅ layer have determined as 42%. According to the Raman spectroscopy, the peaks for orthorhombic phase of Nb₂O₅ and graphene bands have been observed. According to obtained results, graphene is a promising dopant material for the high performance electrochromic device with Nb₂O₅ active layer.

电致变色设备在能效管理和现代显示技术中起着关键作用。作为阴极着色材料，Nb ₂ O ₅是电致变色器件中使用的重要材料之一。层的容量与嵌入和脱嵌行为有关。石墨烯掺杂是用于大容量离子存储应用的有前途的工艺。石墨烯是一种二维材料，它具有出色的机械和电气性能。在本文中，通过热离子真空电弧（TVA）技术将掺杂石墨烯的Nb ₂ O ₅薄膜沉积到了ITO涂覆的玻璃基板上。着色效率经计算为91和56 cm ² C ^-1分别在414和550 nm处 石墨烯掺杂的Nb ₂ O ₅层的透射率变化确定为42％。根据拉曼光谱法，已经观察到Nb ₂ O _5的正交相和石墨烯带的峰。根据获得的结果，石墨烯是用于具有Nb ₂ O ₅活性层的高性能电致变色器件的有前途的掺杂剂材料。