Thin films of epoxy/silicone loaded with N-CNT were prepared by a method of sol-gel and deposited on ITO glass substrates at room temperature. The properties of the loaded monolayer samples (0.00, 0.07, 0.1, and 0.2 wt% N-CNTs) were analyzed by UV-visible spectroscopy. The transmittance for the unloaded thin films is 88%, and an average transmittance for the loaded thin film is about 42 to 67% in the visible range. The optical properties were studied from UV-visible spectroscopy to examine the transmission spectrum, optical gap, Tauc verified optical gap, and Urbach energy, based on the envelope method proposed by Swanepoel (1983). The results indicate that the adjusted optical gap of the film has a direct optical transition with an optical gap of 3.61 eV for unloaded thin films and 3.55 to 3.19 eV for loaded thin films depending on the loading rate. The optical gap is appropriately adapted to the direct transition model proposed by Tauc et al. (1966); its value was 3.6 eV for unloaded thin films and from 3.38 to 3.1 eV for loaded thin films; then, we determined the Urbach energy which is inversely variable with the optical gap, where Urbach’s energy is 0.19 eV for the unloaded thin films and varies from 0.43 to 1.33 eV for the loaded thin films with increasing rate of N-CNTs. Finally, nanocomposite epoxy/silicone N-CNT films can be developed as electrically conductive materials with specific optical characteristics, giving the possibility to be used in electrooptical applications.

中文翻译：

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载有 N 掺杂 CNT 复合材料的环氧树脂/硅树脂混合物：光电性能研究

通过溶胶-凝胶法制备了载有 N-CNT 的环氧树脂/硅胶薄膜，并在室温下沉积在 ITO 玻璃基板上。通过紫外-可见光谱分析负载的单层样品（0.00、0.07、0.1 和 0.2 wt% N-CNT）的特性。未加载薄膜的透射率为88%，加载薄膜的平均透射率在可见光范围内约为42%至67%。基于 Swanepoel (1983) 提出的包络法，通过紫外-可见光谱研究了光学特性，以检查透射光谱、光学间隙、Tauc 验证的光学间隙和 Urbach 能量。结果表明，调整后的薄膜光学间隙具有直接光学跃迁，空载薄膜的光学间隙为 3.61 eV，3.55 至 3。加载薄膜为 19 eV，具体取决于加载速率。光学间隙适合于 Tauc 等人提出的直接过渡模型。(1966); 未加载薄膜的值为 3.6 eV，加载薄膜的值为 3.38 至 3.1 eV；然后，我们确定了与光学间隙成反比的 Urbach 能量，其中，未加载薄膜的 Urbach 能量为 0.19 eV，随着 N-CNT 速率的增加，加载薄膜的 Urbach 能量从 0.43 到 1.33 eV。最后，纳米复合环氧树脂/硅树脂 N-CNT 薄膜可以开发为具有特定光学特性的导电材料，从而有可能用于电光应用。无负载薄膜为 6 eV，负载薄膜为 3.38 至 3.1 eV；然后，我们确定了与光学间隙成反比的 Urbach 能量，其中，未加载薄膜的 Urbach 能量为 0.19 eV，随着 N-CNT 速率的增加，加载薄膜的 Urbach 能量从 0.43 到 1.33 eV。最后，纳米复合环氧树脂/硅树脂 N-CNT 薄膜可以开发为具有特定光学特性的导电材料，从而有可能用于电光应用。无负载薄膜为 6 eV，负载薄膜为 3.38 至 3.1 eV；然后，我们确定了与光学间隙成反比的 Urbach 能量，其中，未加载薄膜的 Urbach 能量为 0.19 eV，随着 N-CNT 速率的增加，加载薄膜的 Urbach 能量从 0.43 到 1.33 eV。最后，纳米复合环氧树脂/硅树脂 N-CNT 薄膜可以开发为具有特定光学特性的导电材料，从而有可能用于电光应用。