A light-emitting device with an electric power generation function includes a thermal conductive LED board that includes a thermal conductive base having a mounting surface and an open surface, and a board wiring provided on the mounting surface. An LED element is connected with the board wiring. A thermoelectric element is electrically insulated from the thermal conductive base, and thermally coupled with the thermal conductive base. The thermoelectric element includes a casing unit having a housing unit, and includes, in the housing unit, a first electrode unit, a second electrode unit having a work function different from a work function of the first electrode unit, and a middle unit including nanoparticles having a work function between the work function of the first electrode unit and the work function of the second electrode unit. The casing unit is provided on the open surface of the thermal conductive base.

An ionic thermoelectric (i-TE) hydrogel that converts heat into electricity based on the Soret effect, and devices and methods incorporating the ionic thermoelectric hydrogel. The ionic thermoelectric hydrogel includes poly(acrylamide) crosslinked with an alginate, 1-ethyl-3-methylimidazolium tetrafluoroborate, and a poly glycol.

The present disclosure relates to novel two-dimensional halide perovskite materials, and the method of making and using the two-dimensional halide perovskite materials.

The present invention introduces a new hybrid thermal energy harvesting device that combines electrochemistry and semiconductors to achieve simultaneous high saturation thermo-voltage and high current density. This innovation demonstrates the synergistic effect of integrating semiconductors, commonly used in solid-state thermoelectrics for high current density, with ion-conducting polymer electrolytes, known for their high thermo-voltage. The device ensures constant high-power output from continuous or periodic heat sources. It directly converts heat into electricity for immediate use or stores electricity derived from low-grade temperature differentials and temperature ranges for later discharge. It exhibits characteristics resembling both photovoltaics and capacitors simultaneously.

The present invention introduces a new hybrid thermal energy harvesting device that combines electrochemistry and semiconductors to achieve simultaneous high saturation thermo-voltage and high current density. This innovation demonstrates the synergistic effect of integrating semiconductors, commonly used in solid-state thermoelectrics for high current density, with ion-conducting polymer electrolytes, known for their high thermo-voltage. The device ensures constant high-power output from continuous or periodic heat sources. It directly converts heat into electricity for immediate use or stores electricity derived from low-grade temperature differentials and temperature ranges for later discharge. It exhibits characteristics resembling both photovoltaics and capacitors simultaneously.

An object of the present invention is to provide a stable thermoelectric battery. The object can be solved by a thermoelectric battery comprising a working electrode containing a n-type silicon and germanium, a counter electrode, and a solid electrolyte having a polymer having a specific repeating unit with a molecular weight of 200 to 1,000,000, or a derivative thereof, wherein the solid electrolyte contains copper ions or iron ions as an ion source.

An object of the present invention is to provide a stable thermoelectric battery. The object can be solved by a thermoelectric battery comprising a working electrode containing a n-type silicon and germanium, a counter electrode, and a solid electrolyte having a polymer having a specific repeating unit with a molecular weight of 200 to 1,000,000, or a derivative thereof, wherein the solid electrolyte contains copper ions or iron ions as an ion source.

A thermoelectric conversion element includes: a thermoelectric conversion layer containing a thiophene polymer, in which a peak intensity of a diffraction angle (2θ) of 7.9° is 5 times or more a peak intensity of a diffraction angle (2θ) of 25.8° in an X-ray diffraction spectrum of the thermoelectric conversion layer.

A thermoelectric conversion element includes: a thermoelectric conversion layer containing a thiophene polymer, in which a peak intensity of a diffraction angle (2θ) of 7.9° is 5 times or more a peak intensity of a diffraction angle (2θ) of 25.8° in an X-ray diffraction spectrum of the thermoelectric conversion layer.

A thermoelectric thin film material including an organic-inorganic hybrid perovskite doped with an organic dopant represented by the general expression ABX.sub.3 where A is an A-site cation, B is a B-site cation, and X is a halide anion. A method of making a thermoelectric thin film material including forming an organic-inorganic hybrid perovskite doped with an organic dopant represented by the general expression ABX.sub.3 where A is an A-site cation, B is a B-site cation, and X is a halide anion. A thermoelectric device comprising a thermoelectric thin film material.