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首页> 外文期刊>Optical Materials >Properties of tris (8-hydroxyquinoline) aluminum thin films fabricated by spin coating from static and dynamic dispense methods
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Properties of tris (8-hydroxyquinoline) aluminum thin films fabricated by spin coating from static and dynamic dispense methods

机译：Tris（8-羟基喹啉）铝薄膜的性质由旋转涂层制成的静电和动态分配方法

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摘要

Thin films of Tris-(8-hydroxyquinoline) aluminum (Alq(3)) were prepared from a solution dissolved in chloroform by spin coating technique on glass substrates with two different dispense methods. Analysis of Atomic Force Microscopy data revealed that the formation of granular features in thin films of Alq(3) which depends on the method of dispense. Broader height and size distributions have been observed for the films prepared from the static dispense method with a mean granular height of 30 nm and radius spread out to a large range from 25 to 175 nm with a mean value 130 nm. For the films prepared from the dynamic dispense method it was found that there exists a higher granular formation density, with the mean height and radius of particles being 31 and 92 nm respectively with more confined distributions. The HOMO-LUMO energy gap was estimated from Tauc plots. Films prepared from the static dispense method, the energy gap was 2.78 eV, while films prepared using the dynamic dispense method featured an energy gap of 2.95 eV. The larger energy gap can be attributed to the smaller particle size of films prepared with the dynamic dispense method.
机译：通过旋涂技术在玻璃基板上溶解在氯仿中的溶液中制备三（8-羟基喹啉）铝（Alq（3））的薄膜，具有两种不同的分配方法。原子力显微镜数据分析显示，ALQ（3）薄膜中的颗粒特征的形成，这取决于分配方法。已经观察到由静电分配方法制备的薄膜的薄膜高度和尺寸分布，其平均颗粒高度为30nm，半径从25至175nm扩展到大的范围，平均值130nm。对于由动态分配方法制备的薄膜，发现存在更高的粒状形成密度，平均高度和颗粒的半径分别为31和92nm，具有更多狭窄的分布。从陶氏图估算同性恋能量差距。从静电分配方法制备的薄膜，能量间隙为2.78eV，而使用动态分配方法制备的薄膜具有2.95eV的能隙。较大的能隙可归因于用动态分配方法制备的薄膜的较小粒径。

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