In this study, spin coating, which is a chemical film layer thin film deposition method, was used for coronene films that were grown on Si substrates annealed at 325, 350 and 375K to examine the impacts on the optical properties of films. This method allows for easy control of the deposition parameters such as concentration, temperature and time as well as enables the film growth at low cost. Optical (UV–Vis) spectral measurements in the wavelength range from 200nm to 800nm were used to extract the bandgap information and to calculate various optical parameters of the spin-coated coronene films. The electronic transitions on the absorption of photons of suitable energy are of indirect allowed type. The corresponding optical bandgap (Eg) was determined. Complex dielectric constants, dissipation factor, optical and electrical conductances and refractive index of coronene films were analyzed as a function of temperature. As the film annealing temperature was increased, the dielectric constants and the refractive index values increased, whereas the optical bandgap and electrical and optical conductivity values decreased.

中文翻译：

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Coronene 有机薄膜：退火温度影响下的光学和光谱特性

在这项研究中，旋涂是一种化学薄膜层薄膜沉积方法，用于在 325、350 和 375 退火的硅衬底上生长的晕烯薄膜。K 检查对薄膜光学性能的影响。这种方法可以轻松控制沉积参数，例如浓度、温度和时间，并且能够以低成本进行薄膜生长。波长范围为 200 的光学 (UV-Vis) 光谱测量纳米到 800nm用于提取带隙信息并计算旋涂晕烯薄膜的各种光学参数。吸收适当能量光子的电子跃迁属于间接允许类型。相应的光学带隙（乙G) 确定。分析了Coronene薄膜的复介电常数、耗散因数、光学和电导以及折射率随温度的变化。随着薄膜退火温度的升高，介电常数和折射率值增加，而光学带隙和电导率值降低。