Power factor enhancement in solution-processed organic n-type thermoelectrics through molecular design

Area of Science:

• Materials Science
• Organic Electronics
• Thermoelectrics

Background:

• Organic thermoelectric materials offer potential for flexible and low-cost energy harvesting.
• Developing high-performance n-type organic thermoelectric materials remains a significant challenge.

Purpose of the Study:

• To report a new class of high-performance n-type organic thermoelectric materials.
• To investigate the impact of molecular design on thermoelectric properties.

Main Methods:

• Synthesis of self-doping perylene diimide derivatives with modified side chains.
• Characterization of the thermoelectric properties of the synthesized materials.

Main Results:

• Achieved the highest reported n-type thermoelectric performance for solution-processed organic materials.
• Obtained power factors as high as 1.4 μW/mK(2).

Conclusions:

• Self-doping perylene diimide derivatives represent a promising class of n-type organic thermoelectric materials.
• Molecular design is a viable strategy for significantly enhancing organic thermoelectric performance.