Rafique Saqib, Badiei Nafiseh, Burton Matthew R, Gonzalez-Feijoo Jorge Eduardo, Carnie Matthew J, Tarat Afshin, Li Lijie
College of Engineering, Swansea University, Swansea SA1 8EN, United Kingdom.
SPECIFIC, College of Engineering, Swansea University, Swansea SA1 8EN, United Kingdom.
ACS Omega. 2021 Feb 10;6(7):5019-5026. doi: 10.1021/acsomega.0c06221. eCollection 2021 Feb 23.
As practical interest in the flexible or wearable thermoelectric generators (TEGs) has increased, the demand for the high-performance TEGs based on ecofriendly, mechanically resilient, and economically viable TEGs as alternatives to the brittle inorganic materials is growing. Organic or hybrid thermoelectric (TE) materials have been employed in flexible TEGs; however, their fabrication is normally carried out using wet processing such as spin-coating or screen printing. These techniques require materials dissolved or dispersed in solvents; thus, they limit the substrate choice. Herein, we have rationally designed solvent-free, all carbon-based TEGs dry-drawn on a regular office paper using few-layered graphene (FLG). This technique showed very good TE parameters, yielding a power factor of 97 μW m K at low temperatures. The p-type only device exhibited an output power of up to ∼19.48 nW. As a proof of concept, all carbon-based p-n TEGs were created on paper with the addition of HB pencil traces. The HB pencil exhibited low Seebeck coefficients (-7 μV K), and the traces were highly resistive compared to FLG traces, which resulted in significantly lower output power compared to the p-type only TEG. The demonstration of all carbon-based TEGs drawn on paper highlights the potential for future low-cost, flexible, and almost instantaneously created TEGs for low-power applications.
随着对柔性或可穿戴热电发电机（TEG）的实际兴趣增加，对基于生态友好、机械弹性且经济可行的TEG作为脆性无机材料替代品的高性能TEG的需求也在增长。有机或混合热电（TE）材料已用于柔性TEG；然而，它们的制造通常采用旋涂或丝网印刷等湿法工艺。这些技术要求材料溶解或分散在溶剂中，因此限制了基板的选择。在此，我们合理设计了一种无溶剂、全碳基的TEG，它是使用少层石墨烯（FLG）在普通办公纸上干拉而成的。该技术显示出非常好的TE参数，在低温下功率因数达到97 μW m K 。仅p型器件的输出功率高达约19.48 nW。作为概念验证，通过添加HB铅笔痕迹在纸上制作了全碳基p-n TEG。HB铅笔的塞贝克系数较低（-7 μV K），与FLG痕迹相比，这些痕迹电阻很高，这导致与仅p型TEG相比输出功率显著降低。在纸上绘制全碳基TEG的演示突出了未来用于低功率应用的低成本、柔性且几乎可即时制作的TEG的潜力。
