Aluminum-doped zinc oxideecoated 3D spacer fabrics with electroless plated copper contacts for textile thermoelectric generators
in: Materials Today Energy (2021)
The technology of electroless metal plating was investigated for coating of three-dimensional spacer fabrics with copper (Cu) serving as contact layers. A subsequent etching process allowed the structuring of the spacer fabrics and thus the exposure of the spacer threads, which were coated with the thermoelectrically active semiconductor material aluminum-doped zinc oxide (Al:ZnO or AZO). For this, the atomic layer deposition was used. The material combination AZO/Cu used for a single thermoelectricactive element with a size of 30 _ 30 mm2 worked as a small thermoelectric generator and showed a maximum output power of 0.16 mWat a temperature difference of 62 K. AZO as an alternative non-toxic thermoelectric material exhibited a temperature-dependent Seebeck coefficient (e.g. 55 mV/K for DT ¼ 50 K).