The Electroluminescence of a Novel Complex Eu(o-BBA)3(phen)
LIU Ling1, XU Zheng1*, ZHANG Fu-jun1, LOU Zhi-dong1, SUN Bo2, PEI Juan２
1. Institute of Optoelectronics Technology, Key Laboratory of Luminescence and Optical Information, Ministry of Education, Beijing Jiaotong University， Beijing 100044, China 2. Department of Materials Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
Abstract：A novel rare earth complex of Eu ion with 2-benzoylbenzoic acid and 1,10-phenathrolinephen (Eu(o-BBA)3(phen)) was synthesized and used as a dopant to fabricate efficient electroluminescence(EL) devices. It was doped into poly(N-vinylcarbazole) (PVK) and spin coated into films. Devices using organic layer Alq3 (or inserted hole blocking layer BCP) and inorganic layer ZnS as electron transporting layer respectively were fabricated. The luminescence properties of the single-layer decvice A (ITO/PVK∶Eu/Al) and the organic-inorganic heterostructure device were analyzed. It was found that the device using ZnS as the electron transporting layer has higher brightness and lower threshold voltage while maintains pure emission.
[1] Tang C W，VanSlyke S A. Appl. Phys. Lett., 1987, 51: 913. [2] Burroughes J H, Bradly D D C，Broun A R，et al. Nature, 1990, 347: 539. [3] Kido J, Hayase H, Hongawa K, et al. Appl. Phys. Lett., 1995, 65: 2124. [4] Gao X C, Cao H, Huang C, et al. Appl. Phys. Lett., 1998, 72: 2217. [5] LI Jian-yu(李建宇). Rare Earth Luminescence Material and Its Application(稀土发光材料及其应用). Beijing: Chemical Industry Press(北京: 化学工业出版社), 2003. [6] Li J Y, et al. Thin Solid Films, 2004, 446: 111. [7] DUAN Ning, ZHANG Xi-qing, GAO Xin, et al(段 宁, 张希清, 高 新, 等). Spectroscopy and Spectral Analysis(光谱学与光谱分析), 2001, 21(3): 267. [8] YANG Sheng-yi, WANG Zhen-jia, XU Xu-rong, et al(杨盛谊, 王振家, 徐叙瑢, 等). Spectroscopy and Spectral Analysis(光谱学与光谱分析), 2000, 20(6): 872. [9] Rie Walter, Riel Heike, Seidler Paul F, et al. Synth. Met., 1999, 99: 213. [10] Su S H, Chen S X, Yokoyama M, et al. J. SID., 1996, 4: 315.
