| 光谱学与光谱分析 |
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| 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 |
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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.
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Received: 2005-07-08
Accepted: 2005-10-18
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Corresponding Authors:
XU Bing-she
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| Cite this article: |
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WANG Hua,HAO Yu-ying,GAO Zhi-xiang, et al. Preparation and Spectral Analysis of a New Type of Blue Light-Emitting Material δ-Alq3[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2006, 26(10): 1884-1887.
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| URL: |
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https://www.gpxygpfx.com/EN/Y2006/V26/I10/1884 |
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