1. College of Science of Taiyuan University of Technology, Taiyuan 030024, China 2. College of Materials Science and Engineering of Taiyuan University of Technology，Taiyuan 030024, China 3. Institute of Applied Chemistry of Shanxi, Tayuan 030024, China
Abstract：A new light emitting material, salicylaldehyde anil zinc (SAZ), was synthesized. It can form high quality nano-scale amorphous thin films on clean glass substrates by vacuum evaporation. Its structure, crystallization, thermal stability, and optical property were investigated by IR spectra, DTA-TG analysis, XRD spectra, UV-Vis spectra, and fluorescence spectra. Its energy band structure was confirmed by cyclic voltammogram and optical absorption band edge. Results show that the SAZ film is a thermally stable material, and can emit intense green fluorescence with a peak wavelength at 508 nm and a full width at halfmaximum of 90.2 nm under UV irradiation. Its HOMO energy level is about -5.659 eV，LUMO energy level is about -3.054 eV，optical gap band is about 2.604 eV. The fluorescence decay of stored films under ambient atmosphere is more rapid than that of 8-hydroxyquinoline aluminum films. However, the fluorescence decay of the films under UV irradiation is slower than that of 8-hydroxyquinoline aluminum films.
[1] Tang C W, Van Slyke S A. J. Appl. Phys. Lett., 1987, 51(12): 913. [2] HAO Yu-ying, HAO Hai-tao, WANG Hua, et al(郝玉英，郝海涛，王 华, 等). Spectroscopy and Spectral Analysis(光谱学与光谱分析)，2004, 24(12): 1524. [3] YANG Shen-yi, WANG Zhen-jia, CHEN Xiao-hong, et al(杨盛谊，王振家，陈晓红, 等). Acta Physica Sinica(物理学报)，2000, 45(8): 824. [4] Yuji Hamada, Takeshi Sano, Masayuki Fujita, et al. Jpn. J. Appl. Phys., 1993, 32: L511. [5] Tao X T，Suzuki H，Watanabe T, et al. J. Appl. Phys. Lett., 1997, 70: 1503. [6] Shao Yan, Qiu Yong, Hu Wenhua, et al. Adv. Mater. Opt. Electron, 2000, 10(6): 285. [7] Gui Yu, Liu Yunqi, Song Yaru, et al. Synthetic Metals, 2001, 117: 211. [8] Kim Sung Min, Kim Jin-Soon, Sohn Byung Chung, et al. Molecular Crystals and Liquid Crystals Science and Technology Section A: Molecular Crystals and Liquid Crystals. 2001, 371: 321. [9] SONG Ya-ru, WU Hong, WANG De-fa, et al(宋雅茹，吴 红，王德发, 等). Spectroscopy and Spectral Analysis(光谱学与光谱分析)，2000, 20(5): 730. [10] HUANG Chun-hui, LI Fu-you, HUANG Yan-yi(黄春晖，李富友，黄岩谊). Ultrathin Films for Optical and Electronics(光电功能超薄膜). Beijing: Peking University Press(北京: 北京大学出版社)，2001. 76. [11] FANG Rong-chuan(方容川). Solid State Spectroscopy(固体光谱学). Hefei: Press of China University of Science and Technology (合肥: 中国科技大学出版社), 2001. 61, 128, 195. [12] GUO Yi-cheng，WANG Zhen-xi(郭贻诚，王震西). The Physics of Amorphous State(非晶态物理学). Beijing: Science Press(北京: 科学出版社), 1984. 204. [13] SONG Wen-bo，CHEN Xu，WU Fang, et al(宋文波，陈 旭，吴 芳，等). Chemical Journal of Chinese Universities(高等学校化学学报)，2000，21(9): 1422.
