1. L. Cui et al., Bipolar host materials for high efficiency phosphorescent organic light emitting diodes: tuning the HOMO/LUMO levels without reducing the triplet energy in a linear system.J. Mater. Chem. C, 2013,1, 8177-8185. DOI: 10.1039/C3TC31675K
2. H. Sasabe et al., 3,3′-Bicarbazole-Based Host Materials for High-Efficiency Blue Phosphorescent OLEDs with Extremely Low Driving Voltage. Adv. Mater., 2012 24, 3212–3217. DOI: 10.1002/adma.201200848
3. C-J. Shih et al., Lifetime of Fluorescent and Phosphorescent Organic Light-Emitting Diodes.ACS Appl. Mater. Interfaces, 2018, 10, 24090−24098. DOI: 10.1021/acsami.8b08281
4. J. Yu et al., 4, 6-Bis[3-(dibenzothiophen-2-yl)phenyl] pyrimidine bipolar host for bright, efficient and low efficiency roll-off phosphorescent organic light-emitting devices. Org. Electronics, 2016, 38, 301-306. DOI: 10.1016/j.orgel.2016.09.002
5. Chen, Y., Zhang, D., Zhang, Y., Zeng, X., Huang, T., Liu, Z., Li, G., Duan, L., Approaching Nearly 40% External Quantum Efficiency in Organic Light Emitting Diodes Utilizing a Green Thermally Activated Delayed Fluorescence Emitter with an Extended Linear Donor–Acceptor–Donor Structure. Adv. Mater.2021, 33, 2103293. DOI: 10.1002/adma.202103293
