The key to preparing nano-films by DC (Direct Current) sputtering is to prepare the film materials into targets. Organic small molecule fluorescent materials (such as 1, 4-Bis(2-cyanostyryl) benzene, to be noted as ER-I) are usually not conductive, and it is not possible to make the elements as targets. Therefore, there are some difficulties in preparing the organic materials into films by DC sputtering. In this paper, we fabricated ER-I nano-films by using the DC sputtering method, and their fluorescence properties are significantly different from those of powder materials. The fluorescence emission spectra of the films prepared by the DC sputtering method have an apparent bimodal morphology. Compared with the ER-I powder material, the fluorescence emission peak has a blue shift of 5 nm and 22 nm. To study the luminescence mechanism of the films, we further investigated the fluorescence properties of the films after thermal treatment and analyzed the structure and surface morphology of the films by XRD and SEM. This paper provides a new idea and method for the preparation of organic nano-films and has a potential application value in the preparation of organic light-emitting films and soft optics devices.

中文翻译：

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直流溅射法制备的非导电有机小分子纳米薄膜的荧光特性

通过直流溅射制备纳米薄膜的关键是将薄膜材料制备成靶材。有机小分子荧光材料（例如1，4-双（2-氰基苯乙烯基）苯，称为ER-1）通常是不导电的，因此不可能将其作为目标。因此，通过DC溅射将有机材料制成膜存在一些困难。在本文中，我们使用直流溅射法制备了ER-I纳米膜，其荧光性质与粉末材料的荧光性质显着不同。通过DC溅射法制备的膜的荧光发射光谱具有明显的双峰形态。与ER-1粉末材料相比，荧光发射峰具有5nm和22nm的蓝移。为了研究薄膜的发光机理，我们进一步研究了热处理后薄膜的荧光特性，并通过XRD和SEM分析了薄膜的结构和表面形态。本文为有机纳米薄膜的制备提供了一种新的思路和方法，在有机发光薄膜和软光学器件的制备中具有潜在的应用价值。