Graphene-carbon nanotubes (CNTs) nanocomposites hold tremendous potential to offer more innovative and cost-effective electronic technologies. In this study, type of CNTs employed to form composites with reduced graphene oxide (rGO) were single walled carbon nanotubes (SWCNTs), multiwalled carbon nanotubes (MWCNTs), and mixed CNTs (blends of SWCNTs and MWCNTs). The composites were further utilized to fabricate the planar heterojunction devices. Field emission scanning electron microscopy, UV-Vis and Raman spectroscopy of the synthesized nanocomposites were performed to investigate the surface morphology, absorption behavior and structure, respectively. On comparing the optoelectronic performance of devices, we found that mixed CNTs-rGO nanocomposite-based devices exhibited greater responsivity and detectivity compared to those of SWCNTs and MWCNTs based devices. The superior performance is mainly ascribed to the better immunity of the mixed CNTs-rGO nanocomposite-based devices against the charge recombination due to the better interface quality and lesser interface defects, as inferred from the dark current analysis and impedance spectroscopy analysis. This work demonstrates the great potential of mixed CNTs-rGO composites as an active layer material for optoelectronic applications.

石墨烯-碳纳米管 (CNT) 纳米复合材料在提供更具创新性和成本效益的电子技术方面具有巨大的潜力。在这项研究中，用于与还原氧化石墨烯 (rGO) 形成复合材料的 CNT 类型是单壁碳纳米管 (SWCNT)、多壁碳纳米管 (MWCNT) 和混合 CNT（SWCNT 和 MWCNT 的混合物）。复合材料进一步用于制造平面异质结器件。对合成的纳米复合材料进行场发射扫描电子显微镜、UV-Vis 和拉曼光谱，分别研究其表面形貌、吸收行为和结构。在比较器件的光电性能时，我们发现，与基于单壁碳纳米管和多壁碳纳米管的器件相比，基于混合碳纳米管-rGO 纳米复合材料的器件表现出更高的响应度和探测能力。从暗电流分析和阻抗谱分析推断，优异的性能主要归因于基于混合 CNTs-rGO 纳米复合材料的器件由于更好的界面质量和更少的界面缺陷而对电荷复合具有更好的免疫力。这项工作证明了混合 CNTs-rGO 复合材料作为光电应用的活性层材料的巨大潜力。从暗电流分析和阻抗谱分析推断。这项工作证明了混合 CNTs-rGO 复合材料作为光电应用的活性层材料的巨大潜力。从暗电流分析和阻抗谱分析推断。这项工作证明了混合 CNTs-rGO 复合材料作为光电应用的活性层材料的巨大潜力。