International Conference on Solid State Devices and Materials

Organic semiconductor possesses the heat-electricity ability, excellent flexibility, and solution processability, enabling their use in direct thermoelectric conversion for energy harvesting and cooling applications. Over the past decades, organic semiconductors have shown promise as organic thermoelectric (OTE) materials. By combining different strategies, we developed three categories of high performance OTE materials with maximum ZT of 0.4, and clarified the decisive role of conjugated structure, selenium atom substitution and molecular orientation in the thermoelectric conversion. Additionally, we provided original demonstrations of self-powered pressure/temperature dual-parameter sensing, ultra-thin electrical cooling applications and ultra-sensitive temperature sensing of OTE materials. Furthermore, we established nanoconfinement electrochemical ion implantation (NEII) technique, addressing the challenge of controllable doping of polymer semiconductors at the nanoscale resolution.