121st General Meeting of the KCS

Type Poster Presentation
Area Organic Chemistry
Room No. Event Hall
Time 4월 19일 (목요일) 11:00~12:30
Code ORGN.P-344
Subject Carbazole and triphenylamine based hole transporting materials for red phosphorescence based OLEDs
Authors seung yu CHOI, BRAVEENTH RAMANASKANDA1, KIHUN YANG2, Seon Guk1, Gyu Youn Chea1,*
Wonkwang University, Korea
1Department of Chemistry, Wonkwang University, Korea
2School of Natural Science/Department of Chemistry, Wonkwang University, Korea
Abstract In this work, four thermally stable hole transporting materials were designed, synthesized and characterized. All materials were exhibited higher decomposition temperature without any crystallization features. All materials were synthesized by using single step Suzuki cross coupling reaction with good yields. The HOMO energy levels of all HTMs were lying between -5.62 to -5.48 eV, which is higher and can facilitate an effective hole transporting pathway. Triphenylamine based HTM 2A and 2B were revealed better properties when compare with carbazole core based HTM 1A and 1B. HTM 2A was showed higher current efficiency of 30.6 cd/A, which is higher than that of reference NPB (27.9 cd/A) based similar device. The external quantum efficiency (EQE) of HTM 2A based device was around 26.7% which was absolutely higher than other materials used with similar device structure. Consequently, HTM 2A based hole only device (HOD) was gave higher hole mobility of 5.3* 10-4 cm2V-1s-1, which is a promising candidate for future thermally stable OLED applications.
E-mail braveenth.czbt@gmail.com