Study on high performance thermoelectric generator using carbon nanotubes and conducting polymers = 탄소나노튜브와 전도성고분자를 이용한 고효율 열전소재에 관한 연구

다국어 초록 (Multilingual Abstract)

The influence of processing conditions, such as ink concentration and coating method, on the thermoelectric properties of SWCNT/P3HT nanocomposite films was investigated systematically. Using simple wire-bar-coating, SWCNT/P3HT nanocomposite films with high thermoelectric performance could be obtained without additional P3HT doping. The wire-bar-coated SWCNT/P3HT nanocomposite films exhibited power factors of up to 105 µW m-1K-2 at room temperature. The SWCNT bundles with diameters in the range of 6 – 23 nm formed an interconnected network in the wire-bar-coated nanocomposite films. Network formation in these nanocomposite films was expected to be strongly related to the development of electrical pathways due to inter-SWCNT bundle connections. This study suggests that the thermoelectric performance of SWCNT/P3HT nanocomposite films could be optimized by controlling their processing conditions and morphology.
Moreover, this study investigates a coating method for doping single-walled carbon nanotube (SWCNT)/poly(3-hexylthiophene) (P3HT) hybrid film. In the hybrid film, P3HT chains were very highly doped by simple spin-coating of a FeCl3/nitromethane solution. Hybrid films doped by spin-coating exhibited power factors of 267 ± 38 µW m-1K-2, which is an improvement over that of hybrid films doped by conventional immersion, 103 ± 24 µW m-1K-2. The excellent thermoelectric performance is originated from the dramatically increased electrical conductivity by the sufficient doping of P3HT in the hybrid films.

목차 (Table of Contents)

• 1. Introduction 1
• 2. Enhanced thermoelectric performance of bar-coated SWCNT/P3HT thin films 4
• 2.1 Abstract 4
• 2.2 Introduction 5
• 2.3 Experiment section 7
• 2.4 Result and discussion 8
• 2.5 Conclusion 30
• 3. Effective doping by spin-coating and enhanced thermoelectric power factors in SWCNT/P3HT hybrid films 31
• 3.1 Abstract 31
• 3.2 Introduction 32
• 3.3 Result and discussion 34
• 3.4 Conclusion 48
• 3.5 Experimental 49
• 3.5.1 Preparation of SWCNT/P3HT hybrid films 49
• 3.5.2 Characterizations 50
• References 51
• Summary in Korean 56