Abstract Temperature dependent changes in the structural, nanomorphological and optical characteristics of the 2D layered molybdenum diselenide (MoSe2), processed by electrophoretic coating (EPC) method, were examined. EPC processed MoSe2 was subjected to Raman spectroscopy confirming distinct active modes of A1g, E 1 1g and E 2 2u at 240.9 cm-1, 282.53 cm-1 and 337.7 cm-1, respectively. The in- and out-of plane vibrational modes observed in the Raman spectra were asserted as the 2H-MoSe2 phase which was not affected by the post annealing temperature. X-ray photoelectron spectroscopic measurements confirmed the states of Mo 3d at 228.9 eV and 232.1 eV, and of Se 3d at 54.5 eV and 55.3 eV. Studies on the surface morphology of the EPC processed MoSe2 showed significant changes due to the post-annealing treatment performed at 150 oC, 250 oC and 350 oC in terms of morphology, flake-size distribution and compactness of the film. The samples annealed at 150 oC and 250 oC showed a better optical absorption in the visible and the near infrared spectral regions with dominant characteristic peaks at 691.2 nm and 801.6 nm. Further studies assured that the EPC process yielded good quality and large area MoSe2 films with exotic structural, optical and nanomorphological characteristics that are highly suitable for functional devices.

中文翻译：

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后退火对电泳涂覆的二维层状 MoSe2 的结构和光学性能的影响

摘要 研究了通过电泳涂层 (EPC) 方法处理的 2D 层状二硒化钼 (MoSe2) 的结构、纳米形态和光学特性的温度依赖性变化。EPC 处理的 MoSe2 进行拉曼光谱确认 A1g、E 1 1g 和 E 2 2u 的不同活性模式分别在 240.9 cm-1、282.53 cm-1 和 337.7 cm-1。在拉曼光谱中观察到的平面内和平面外振动模式被断言为 2H-MoSe2 相，它不受后退火温度的影响。X 射线光电子能谱测量证实了 Mo 3d 在 228.9 eV 和 232.1 eV 的状态，以及 Se 3d 在 54.5 eV 和 55.3 eV 的状态。对 EPC 处理的 MoSe2 表面形貌的研究表明，由于在 150 oC 下进行后退火处理，发生了显着变化，250 oC 和 350 oC 在薄膜的形态、薄片尺寸分布和致密性方面。在 150 oC 和 250 oC 退火的样品在可见光和近红外光谱区表现出更好的光吸收，在 691.2 nm 和 801.6 nm 处具有主要特征峰。进一步的研究确保 EPC 工艺产生了高质量和大面积的 MoSe2 薄膜，具有非常适合功能器件的奇异结构、光学和纳米形态特征。