Enhancement of power factor of screen printed polyaniline /graphite based flexible thermoelectric generator by structural modifications

Ramakrishna Nayak, Prakasha Shetty, Selvakumar M, Ashok Rao, K. Mohan Rao, Gurukrishna K, Suraj Mangavati

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)


The work presented in this paper demonstrates an experimental path to improve the performance of a screen-printed flexible thermoelectric generator through optimization of leg materials, geometrical and structural parameters of the leg, and the viscosity of screen-printed ink. A thin and porous screen-printed leg structure improves the Seebeck coefficient and power output by 11.53 and 8.52 times, respectively than a thick and denser leg structure. A trapezoidal design increases the Seebeck coefficient, and power output by 2.72 and 3.82 times, respectively, compared with a rectangular leg structure. The observed increment in the power output using silver as contact material is about 2.17 times higher than graphene. Screen ink with higher ink viscosity results in a 47 % reduction of transient thermal conductivity and an increased power factor by 20.33 times. The rectangular leg produces the maximum power factor of 1.30 × 10−12 µWmm−2K−2. The improvement possible in the power output by controlling the leg structure's porosity is around 752.71 %. The result indicates that optimization of ink viscosity and porosity of ink film has significant influence in enhancing the performance of FTEG than its leg shapes and material properties.

Original languageEnglish
Article number166298
JournalJournal of Alloys and Compounds
Publication statusPublished - 20-11-2022

All Science Journal Classification (ASJC) codes

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry


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