Research / 2019 / Article / Fig 3

Review Article

Emerging Devices Based on Two-Dimensional Monolayer Materials for Energy Harvesting

Figure 3

Triboelectric nanogenerators based on monolayer 2-D materials. (a, b) Design and device fabrication of transparent TENG used monolayer graphene as the electrode. The monolayer graphene-based device exhibited the highest output performance. Reproduced with permission from Wiley-VCH [26]. (c) Mechanism of power generation of a triboelectric nanogenerator. Reproduced with permission from the Royal Society of Chemistry [70]. (d, e) Tunnelling triboelectrification by friction of the monolayer graphene with a Pt AFM tip. The average surface potential decreases as the number of graphene layers increases. Reproduced with permission from the Nature Publishing Group [73]. (f) Triboelectric series of 2-D layered materials determined by the performance of TENGs. Reproduced with permission from Wiley-VCH [75].