Title Page
Contents
Chapter 1. Electrohydrodynamic Jet-Printed Phthalimide-Derived Conjugated Polymer for Organic Field-Effect Transistors and Logic Gates. 8
1. Abstract 8
2. Introduction 9
3. Experimental Section 12
3.1. Materials 12
3.2. Morphological Characterization 12
3.3. Device Fabrication and Measurements 12
4. Results & Discussion 15
5. Conclusion 22
6. References 23
8. Supporting Information 34
Chapter 2. Side-Chain Engineering in DPP-Based Polymers for Printed Organic Field-Effect Transistors and Logic Gates 49
1. Abstract 49
2. Introduction 50
3. Results and Discussion 53
4. Operation of Logic Devices 62
5. Conclusions 64
6. References 65
8. Supporting Information 83
Chapter 3. Rapid electrohydrodynamic jet printing for self-aligned organic semiconducting layers and printed organic electronics. 95
1. Abstract 95
2. Introduction 96
3. Experimental Section 99
3.1. Materials 99
3.2. TIPS-PEN printing 99
3.3. Device Fabrication 100
3.4. Characterizations 101
4. Results and Discussion 102
5. Conclusions 111
6. References 112
8. Supporting Information. 121
요약 131
Chapter 1 6
Table 1. Electrical characteristics of OFETs fabricated using optimal conditions of seven-cycle printing at Sₚ ＝ 10 mm/s, then TANN ＝ 200 ℃. 31
Chapter 2 7
Table 1. Optical and electrochemical properties of P29DPP-TT 73
Table 2. Device parameters of OFETs fabricated using P29DPP-TT 75
Table 3. OFET parameters obtained from devices with P29DPP-TT 79
Figure 1. (a) Schematic diagram of electrohydrodynamic (EHD) jet printing process, and optical microscopy (OM) images taken with high-speed... 27
Figure 2. AFM topography images of the PBDTTTffPI thin films prepared by (a) spin coating and (b-g) EHD jet printing. The EHD jet printing... 28
Figure 3. 2D-GIWAXS patterns of (a) spin coated and (b-h) EHD-jet-printed PBDTTTffPI thin films obtained at different printing speeds and d... 29
Figure 4. (a) Image of a vial containing the PBDTTTffPI inks dissolved in chloroform for EHD jet printing. (b) Schematic representation of botto... 30
Figure 5. (a) Schematic representation of the bottom-gate/top-contact OFET with the EHD-jet-printed semiconductor ODPA. (b) OM image of... 32
Figure 6. OM images of the inventor, logic gate arrays, and circuit diagram. (b) Voltage transfer characteristic curve of complementary inverters... 33
Figure 1. (a) molecular structure, (b) normalized UV-vis-NIR absorption spectra, and (c) cyclic voltammogram of P29DPP-TT. 72
Figure 2. Transfer (a-d) and output (e-h) characteristics of OFETs fabricated with spin-coated P29DPP-TT layers and thermally annealed at di... 74
Figure 3. (a-d) AFM images and (e-h) 2D-GIWAXS patterns of P29DPP-TT thin films spin-coated and thermally annealed at different temperatures. 76
Figure 4. Schematic image of (a) EHD jet printing and (b) OFET with EHD-printed P29DPP-TT, and OM images P29DPP-TT thin films fabric... 77
Figure 5. (a-d) Transfer and (e-h) output characteristics of OFETs fabricated by (a and e) spin-coating or (b-d, and f-h) EHD jet printing. 78
Figure 6. (a-d) AFM images and (e-h) 2D-GIWAXS patterns of (a and e) spin-coated and (b-d and f-h) EHD-printed P29DPP-TT thin films o... 80
Figure 7. (a) OM image, (b) transfer curve, and (c) output curves of the OFET with EHD-printed PVDF:FPA-4F dielectric layer and P29DPP-... 81
Figure 8. (a) OM image of the inverter and the NAND and NOR gates(top to bottom), (b) voltage transfer characteristic and (c) gain transfer c... 82
Chapter 3 7
Figure 1. Schematic illustration of (a) EHD jet printing and (b) printed layer fabrication. Schematic illustration, photograph, and CPOM image of... 117
Figure 2. (a) CPOM and (b) 2D-GIXD images of cone-jet printed layers according to printing speeds. 118
Figure 3. (a) Schematic and OM image of cone-jet based OFET and device electrical characteristics: (b) transfer curve with bias-stress test and... 119
Figure 4. (a) OM and Circuitry images of integrated devices with cone-jet printed TIPS-PEN; NOT gates (tope), NAND gates (middle), and NO... 120