Rational strategy for optimizing electrical conductivity of P3HT for thermoelectric applications
발표자
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초록
내용
Despite lots of advantages of molecular doping based on a solution blending method, it has a limitation in maximizing electrical conductivity of conjugated polymers (CPs) due to the aggregation formation at threshold concentration of dopant molecules. Another widely used sequential doping method also suffers from difficulty in doping crystalline region of CP films. In this study, we suggest a simple but very effective new doping method that combines blend and sequential doping to maximize molecular doping efficiency. The sequentially doped CP thin films after optimized blend doping showed significant increase of electrical conductivity compared to the individually doped ones. Through the characterization of absorption and ESR with C-AFM, it was revealed that the enhancement in electrical conductivity originated from the wholly doping capability of double doping for CP thin films. Finally, improved performance of thermoelectric effect of double doped CP thin films is demonstrated.