Energy devices generating and storing electricity from finger and solar thermal energy

Seunggen Yang, Kyoungah Cho, Sangsig Kim

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)


In this study, we demonstrate an energy device that consists of a thermoelectric generator (TEG) and a micro supercapacitor (MSC); electricity generated by the TEG is directly stored in the MSC. In this energy device, an interdigitated MSC is directly linked to a ring-patterned TEG with 80 pn modules that consist of p-Ag2Te and n-Ag2Se thin films. The ring-patterned TEG is designed for the effective use of thermal energy; a circular metal pad is added in its central area to maximize the absorption of thermal energy from a finger and from solar heat. The voltage of the MSC is rapidly raised up to 169 mV at a temperature difference of 8.6 K for the ring-patterned TEG; a volumetric energy density of 1.1 mJ/cm3 and a power density of 89.5 mW/cm3 are exhibited. In addition, our ring-patterned energy device generates and stores a voltage of 100 mV from the thermal energy of a finger with a raising rate of 0.1 V/min. Moreover, we examine the feasibility of the energy device consisting of a metal pad coated with solar-heat-absorption material when sunlight is used as the thermal energy source.

Original languageEnglish
Article number104458
JournalNano Energy
Publication statusPublished - 2020 Mar


  • Environmental thermal energy
  • Interdigitated micro supercapacitor
  • Solar heat absorption material
  • Thermoelectric generator

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)
  • Electrical and Electronic Engineering


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