도너-어셉터 공중합체의 효과적인 도핑

Abstract

Molecular doping is effective method for changing the electrical and physical properties of organic semiconductors. However, the mechanism of doping process was not certainly discovered and moreover the doping efficiency of the donor-acceptor copolymer was low. Herein, we synthesized diketopyrrolopyrrole based donor-acceoptor copolymers and investigated the doping efficiency of each polymer by UV-Vis, FT-IR, and EPR spectroscopy. The TBD2F polymer which added thiophene linker with DPP based polymer, could be doped effectively by F4TCNQ molecular dopant. Moreover, the 2D-GIXD was measured to analyze the do-pant position at polymer crystalline phase. From the result we could speculate that by dopant located at alkyl chain region of polymer crystalline matrix, the efficient doping enabled.YⅠ. Introduction 1 1.1 Organic semiconductors 1 1.2 Doping of organic semiconductors 1 1.2.1 Mechanisms of molecular doping 1 1.2.2 Doping of copolymer 2 Ⅱ. Results and discussion 3 2.1 Molecular structures 3 2.2 UV-Visible spectroscopy 3 2.3 Fourier transform infrared spectroscopy 4 2.4 Electron paramagnetic resonance spectroscopy 5 2.5 2-D Gazing incident X-ray diffraction 6 Ⅲ. Conclusion 8MasterdCollectio