An ICT-featured compound with a small ΔEST but a lower lying 3ππ* state than 3CT state is demonstrated to show P-type rather than E-type delay fluorescence, and is a quite promising OLED host.
A series of imidazolyl-phenylcarbazole-based hostmaterials, i. e., im-CzP, im-CzPCz, im-CzPtBu, and im-OCzP, were synthesized to obtain high-efficiency green and red-emitting PhOLEDs. An electrontransportmaterial, bis-4,6-(3,5-di-3-pyridylphenyl)-2-methylpyrimidine (B3PyMPM) was selected to construct a co-hosted system. The efficiency of im-OCzP combined with B3PyMPM forming co-hosts could also
一系列咪唑基-苯基咔唑基主体材料,即。例如,合成了 im-CzP、im-CzPCz、im-CzP t Bu和im-OCzP以获得高效的绿色和红色发光 PhOLED。选择电子传输材料 bis-4,6-(3,5-di-3-pyridylphenyl)-2-methylpyrimidine (B3PyMPM) 来构建共托管系统。im-OCzP与B3PyMPM结合形成共宿主的效率也可以达到 23.0(80.0 cd A -1和 98.8 lm W -1)和 16.5 %(10.2 cd A -1和 13.4 lm W -1)的高值分别为绿色和红色PhOLED。
Star-Shaped Oligotriarylamines with Planarized Triphenylamine Core: Solution-Processable, High-<i>T</i><sub>g</sub> Hole-Injecting and Hole-Transporting Materials for Organic Light-Emitting Devices
作者:Zuoquan Jiang、Tengling Ye、Chuluo Yang、Dezhi Yang、Minrong Zhu、Cheng Zhong、Jingui Qin、Dongge Ma
DOI:10.1021/cm1018585
日期:2011.2.8
optoelectronic properties can be modulated by the peripheral triarylamine groups. For example, FATPA-T with triphenylamine peripheries shows the significantly red-shifted absorption and emission, as well as the small band gap as compared to FATPA-Cz with carbazole peripheries. Double-layer Alq3-emitting OLEDsusing FATPA-T or FATPA-Cz as hole-transport layer by spin-coating method were fabricated, and the