Preparation and Spectral Analysis of a New Type of Blue Light-Emitting Material δ-Alq3
WANG Hua1, HAO Yu-ying2, GAO Zhi-xiang3, ZHOU He-feng1, XU Bing-she1*
1. College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China 2. College of Science, Taiyuan University of Technology, Taiyuan 030024, China 3. Research Institute of Solid Physics, Yanbei Teacher’s College, Datong 037000, China
Abstract：In the present article,δ-Alq3, a new type of blue light-emitting material, was synthesized and investigated by IR spectra, XRD spectra, UV-Vis absorption spectra, photoluminescence (PL) spectra, and electroluminescence (EL) spectra. The relationship between molecular spatial structure and spectral characteristics was studied by the spectral analysis of δ-Alq3 and α-Alq3. Results show that a new phase of Alq3 (δ-Alq3) can be obtained by vacuum heating α-Alq3, and the molecular spatial structure of α-Alq3 changes during the vacuum heating. The molecular spatial structure of δ-Alq3 lacks symmetry compared to α-Alq3. This transformation can reduce the electron cloud density on phenoxide of Alq3 and weaken the intermolecular conjugated interaction between adjacent Alq3 molecules. Hence, the π—π* electron transition absorption peak of δ-Alq3 shifts toward short wavelength in UV-Vis absorption spectra, and the maximum emission peak of δ-Alq3 (λmax=480 nm) blue-shifts by 35 nm compared with that of α-Alq3 (λmax=515 nm) in PL spectra. The maximum emission peaks of δ-Alq3 and α-Alq3 are all at 520 nm in EL spectra.
王华1,郝玉英2,高志翔3,周禾丰1,许并社1* . 一种新型的蓝光发射材料δ-Alq3的制备与光谱分析[J]. 光谱学与光谱分析, 2006, 26(10): 1884-1887.
WANG Hua1, HAO Yu-ying2, GAO Zhi-xiang3, ZHOU He-feng1, XU Bing-she1* . Preparation and Spectral Analysis of a New Type of Blue Light-Emitting Material δ-Alq3. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2006, 26(10): 1884-1887.
[1] Tang C W, Vanslyke S A. Appl. Phys. Lett., 1987, 51: 913. [2] Alessandro Curini, Mauro Boero, et al. Chem. Phys. Lett., 1998, 294: 263. [3] Martin Brinkmann, Gregory Gadret, et al. J. Am. Chem. Soc., 2000, 122: 5147. [4] Braun M, Michael Clle, et al. J. Chem. Phys., 2001, 114: 9625. [5] Michael Clle, Jürgen Gmeiner, et al. Adv. Funct. Mater., 2003, 13: 108. [6] XU Bing-she, WANG Hua, et al(许并社, 王 华, 等). Chinese Patent(中国专利)：ZL02135615. 7. [7] 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. [8] Gary P. Kushto, Junji Kido, et al. J. Phys. Chem. A, 2000, 104: 3670. [9] MA Li-dun(马礼敦). Advanced Structure Analysis(高等结构分析). Shanghai: Fudan University Press(上海: 复旦大学出版社), 2002. [10] Chen C H, Shi Jianmin. Coordination Chemistry Reviews., 1998, 171: 161. [11] Burrows P E, Shen Z, et al. J. Appl. Phys., 1996, 79: 7991. [12] TAN Tian(谈 天). Application of Spectrum Method in Organic Chemistry(波谱方法在有机化学中的应用). Beijing: Higher Education Press(北京: 高等教育出版社), 1985.
