Morphological study of aluminum tris(8-hydroxyquinoline) thin films using infrared and Raman spectroscopy
Morphological study of aluminum tris(8-hydroxyquinoline) thin films using infrared and Raman spectroscopy
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利用红外和拉曼光谱研究三（8-羟基喹啉）铝薄膜的形貌
DOI：
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发表时间：
2002
期刊：
影响因子：
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通讯作者：
D. Batchelder
中科院分区：
文献类型：
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作者：
R. Curry;W. Gillin;J. Clarkson;D. Batchelder
我们提出了全面的拉曼光谱的Alq 3薄膜，退火在各种温度高达300 ℃，在70-1800 /cm的范围内。这些光谱为Alq 3薄膜在200 ℃以上退火时的结构重排提供了有力的证据。用低能拉曼光谱观察到针状晶体在薄膜中生长，并证实其由α Alq 3多晶型组成。此外，在薄膜或粉末的红外或拉曼光谱中没有观察到Alq 3的fac异构体或mer和fac异构体之间的热互变的证据。这些结果可能会有影响的长期效率的有机发光二极管纳入薄膜的Alq 3。
We present comprehensive Raman spectra for thin films of Alq3, annealed at various temperatures up to 300 C, over the range of 70-1800 /cm. These spectra give strong evidence for structural rearrangement of thin films of Alq3 upon annealing at temperatures above 200 C. Needle like crystals are observed to grow in the films and confirmed to be comprised of the a Alq3 polymorph using the low energy Raman spectra. Furthermore, no evidence of the fac isomer or thermal interconversion between the mer and fac isomers of Alq3 was observed in either the infrared or Raman spectra of the thin films or powder. These results may have implications for the long-term efficiencies of organic light emitting diodes incorporating thin films of Alq3.