Highly homogenous crystal violet (CV) thin films are grown by spin coating technique. X-ray diffraction (XRD) measurements have been carried out to identify the dominant orientation of the films. The XRD pattern of as-deposited film showed an amorphous structure which turns into nanocrystalline by thermal annealing at 150 °C for 1 h. The spectroscopic characterization of as-deposited and annealed CV films was estimated via spectrophotometric measurements of transmission and reflection in the spectral range 190–2000 nm. Optical constants of CV films were determined. Wemple-DiDomenico model was applied to the normal dispersion region of refractive index spectrum and from which, many dispersion parameters were calculated. The type of most probable transitions and values of optical energy gaps for CV films were estimated by Tauc plot. The dissipation energy and volume & surface loss functions were estimated. The influence of annealing temperature on the spectroscopic properties, dispersion parameters and energy loss functions were investigated which revealed an improvement in the optical properties and decreased values of energy loss functions for the annealed CV films. The obtained results of optical features for CV films reveals that CV films are an excellent potential absorbing material in solar energy conversion and storage devices.

通过旋涂技术生长高度均匀的结晶紫 (CV) 薄膜。已进行 X 射线衍射 (XRD) 测量以确定薄膜的主要取向。沉积后薄膜的 XRD 图案显示出非晶结构，通过在 150°C 下热退火 1 小时，该结构转变为纳米晶。通过在 190-2000 nm 光谱范围内对透射和反射的分光光度测量来估计沉积和退火 CV 薄膜的光谱特性。确定了 CV 薄膜的光学常数。Wemple-DiDomenico模型应用于折射率光谱的法向色散区域，从中计算出许多色散参数。CV 薄膜最可能的跃迁类型和光学能隙值由 Tauc 图估计。估计耗散能量和体积和表面损失函数。研究了退火温度对光谱特性、色散参数和能量损失函数的影响，揭示了退火 CV 薄膜的光学性能和能量损失函数值的改善。获得的 CV 薄膜光学特性结果表明，CV 薄膜是太阳能转换和存储设备中极好的潜在吸收材料。