n-Type host materials based on nitrile and triazine substituted tricyclic aromatic compounds for high-performance blue thermally activated delayed fluorescence devices
作者:Seokhoon Jang、Kyung Hyung Lee、Soojin Hong、Jun Yeob Lee、Youngu Lee
DOI:10.1016/j.dyepig.2020.109091
日期:2021.3
Novel n-type host materials based on tricyclic aromatic compounds, dibenzo[b,d]furan and dibenzo[b,d]thiophene (2Trz6CNDBF and 2Trz6CNDBT), have been successfully synthesized and characterized for high-performance blue thermally activated delayed fluorescence (TADF) organic light-emitting devices (OLEDs). Dibenzo[b,d]furan and dibenzo[b,d]thiophene were utilized as central molecular building blocks
基于三环芳族化合物二苯并[ b,d ]呋喃和二苯并[ b,d ]噻吩(2Trz6CNDBF和2Trz6CNDBT)的新型n型主体材料已成功合成并表征为高性能蓝色热活化延迟荧光(TADF) )有机发光器件(OLED)。二苯并[ b,d ]呋喃和二苯并[ b,d ]噻吩被用作中心分子构件,以实现出色的热稳定性和高三重态能量(E T)。在中央结构单元的6位和2位引入了腈和二苯基三嗪官能团,以实现低位最低的最低空分子轨道(LUMO)能级,高E T和出色的电子传输性能。UV-Vis吸收,低温光致发光和紫外光电子能谱分析表明,2Trz6CNDBF和2Trz6CNDBT具有较高的E T(2.95和2.88 eV)和较低的LUMO能级(−3.43和-3.16 eV),具有很好的匹配性带有蓝色TADF发射器5CzCN。此外,仅电子器件(EOD)结果表明2Trz6CNDBF和2Trz6CNDBT具有出色的电子