표제지
목차
요약 10
Abstract 11
제1장 서론 12
제2장 이론적 배경 14
2.1. 유기발광다이오드 14
2.2. 열활성지연형광 (TADF) 16
2.3. 외부양자효율 21
제3장 실험방법 23
3.1. TADF 설계 및 합성 23
3.2. 유기 박막 제조 및 PL 분석 23
3.3. Transient PL 분석 24
3.4. TADF-OLEDs 제작 24
3.5. TADF-OLEDs 분석 25
3.6. 광학수치모사 25
제4장 결과 및 고찰 28
4.1. TADF 물질 특성 및 결과 28
4.2. TADF-OLEDs의 특성 및 결과 39
4.3. TADF-OLEDs의 광학수치모사 결과 44
제5장 결론 47
제6장 참고문헌 49
Table 4.1. Photophysical and rate characteristic for TMCzBCO and DMACBCO. 35
Table 4.2. Computationally obtained spin-orbit coupling matrix elements. 36
Table 4.3. Device characteristic of TADF-OLEDs. 43
Fig 1. (a) Samsung Z Flip with flexible OLED display (b) LG Transparent OLED (c) LG rollable diplay 13
Fig 2.1. The structure and working principle of OLEDs 15
Fig 2.2. The operating principle of (a) Fluorescence, (b) Phosphorescence and (c) TADF. 19
Fig 2.3. Boron based TADF for efficient HOMO-LUMO separation. 20
Fig 2.4. Light out-coupling principle 22
Fig 3.1. Chemical structure of (a) TMCzBCO and (b) DMACBCO 26
Fig 3.2. (a) Band diagram of TADF-OLEDs and (b) chemical structures of the molecules in OLEDs 27
Fig 4.1. UV/Vis absorption spectra of (a) TMCzH, DMACH, HBCO, (b) TMCzBCO and DMACBCO in toluene. (C) PL spectra... 32
Fig 4.2. Fluorescence and phosphorescence spectra of (a) TMCzBCO and (b) DMACBCO in toluene at 77K 33
Fig 4.3. (a) Transient PL decays of TMCzBCO and DMACBCO in toluene at 298K. Temperature-dependent transient PL decay... 34
Fig 4.4. Diagram of the RISC mechanism for (a) TMCzBCO and (b) DMACBCO. 37
Fig 4.5. The angle-dependent photoluminescence intensity of EML with (a) TMACzBCO and (b) DMACBCO 38
Fig 4.6. The current-Voltage-Luminance of TADF-OLEDs with (a) TMCzBCO and (c) DMACBCD. The angle-dependent EL... 41
Fig 4.7. The Current density and Power efficiency-current density of TADF-OLEDs with (a) TMCzBCO and (c) DMACBCO.... 42
Fig 4.8. The contour maps of maximum EQEs as a function of thickness of hole transport layer and electron transport layer... 45
Fig 4.9. The contour maps of maximum EQEs as a function of PLQY and horizontal dipole ratio for TADF-OLEDs with (a)... 46