A Novel Deep Blue LE-Dominated HLCT Excited State Design Strategy and Material for OLED
Abstract
:1. Introduction
2. Results and Discussion
2.1. Molecular Design
2.2. Photophysical Characterizations and Excited State Properties
2.3. Thermal Properties and Electrochemical Properties
2.4. OLED Performance
3. Materials and Methods
3.1. Synthesis of Materials
- 4-[1-(4-Bromo-phenyl)-1H-phenanthro[9,10-d]imidazol-2-yl]-benzonitrile (N-BrPMCN)
- 4-[1-(4′-Diphenylamino-biphenyl-4-yl)-1H-phenanthro[9,10-d]imidazol-2-yl]-benzonitrile (N-TBPMCN)
3.2. Photophysical Measurements
3.3. Electrochemical Measurement
3.4. OLED Fabrication and Performances
4. Conclusions
Supplementary Materials
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Acknowledgments
Conflicts of Interest
Sample Availability
References
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Compounds | Td/Tg (°C) | HOMO (eV) | LUMO (eV) | Energy Gap (eV) |
---|---|---|---|---|
N-TBPMCN | 475/218 | −4.97 | −2.74 | 2.23 |
Emitters | Von (V) | Max LE (cd/A) | Max PE (lm/W) | CIE(x,y) | Max Luminance (cd/m2) | Max EQE (%) | EL (nm) | FWHM (nm) | PLQY (%) |
---|---|---|---|---|---|---|---|---|---|
N-TBPMCN-100wt% | 3.3 | 1.9 | 2.0 | 0.171,0.181 | 35.6 | 1.4 | 452 | 91 | 17 |
N-TBPMCN-10wt% | 3.3 | 1.7 | 1.6 | 0.164,0.055 | 161.5 | 3.3 | 423 | 49 | 76 |
N-TBPMCN-15wt% | 3.3 | 1.6 | 1.5 | 0.160,0.052 | 129.5 | 4.0 | 423 | 50 | 75 |
N-TBPMCN-20wt% | 3.3 | 1.8 | 1.7 | 0.157,0.057 | 82.1 | 3.9 | 428 | 56 | 73 |
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Tian, X.; Sheng, J.; Zhang, S.; Xiao, S.; Gao, Y.; Liu, H.; Yang, B. A Novel Deep Blue LE-Dominated HLCT Excited State Design Strategy and Material for OLED. Molecules 2021, 26, 4560. https://doi.org/10.3390/molecules26154560
Tian X, Sheng J, Zhang S, Xiao S, Gao Y, Liu H, Yang B. A Novel Deep Blue LE-Dominated HLCT Excited State Design Strategy and Material for OLED. Molecules. 2021; 26(15):4560. https://doi.org/10.3390/molecules26154560
Chicago/Turabian StyleTian, Xuzhou, Jiyao Sheng, Shitong Zhang, Shengbing Xiao, Ying Gao, Haichao Liu, and Bing Yang. 2021. "A Novel Deep Blue LE-Dominated HLCT Excited State Design Strategy and Material for OLED" Molecules 26, no. 15: 4560. https://doi.org/10.3390/molecules26154560