Giusto Paolo, Cruz Daniel, Heil Tobias, Tarakina Nadezda, Patrini Maddalena, Antonietti Markus
Max Planck Institute of Colloids and Interfaces, Department of Colloid Chemistry, Am Mühlenberg 1, Potsdam, 14476, Germany.
Department of Physics, University of Pavia, Via Bassi, 6, Pavia, 27100, Italy.
Adv Sci (Weinh). 2021 Sep;8(17):e2101602. doi: 10.1002/advs.202101602. Epub 2021 Jul 3.
Ternary materials made up only from the lightweight elements boron, carbon, and nitrogen are very attractive due to their tunable properties that can be obtained by changing the relative elemental composition. However, most of the times, the synthesis requires to use up to three different precursor and very high temperatures for the synthesis. Moreover, the low reciprocal solubility of boron nitride and graphene often leads to BN-C composite materials due to phase segregation. Herein, an innovative method is presented to prepare BCN thin films by chemical vapor deposition from a single source precursor, melamine diborate. The deposition occurs homogenously at relatively low temperatures generating very high degree of sp conjugation. The as-prepared thin films possess high transparency and refractive index values in the visible range that are of interest for reflective mirrors and lenses. Furthermore, they are wide-bandgap semiconductor with very positive valence band, making these materials very stable against oxidation of interest as protective coating and charge transport layer for solar cells. The simple chemical vapor deposition method that relies on commonly available and low-hazard precursor can open the way for application of BCN thin films in optics, optoelectronics, and beyond.
仅由轻质元素硼、碳和氮组成的三元材料因其可通过改变相对元素组成而获得的可调谐特性而极具吸引力。然而，大多数情况下，合成需要使用多达三种不同的前驱体，并且合成温度非常高。此外，氮化硼和石墨烯的低互溶性常常由于相分离而导致形成BN-C复合材料。在此，提出了一种创新方法，通过化学气相沉积从单一源前驱体三聚氰胺二硼酸盐制备BCN薄膜。沉积在相对较低的温度下均匀发生，产生非常高程度的sp共轭。所制备的薄膜在可见光范围内具有高透明度和折射率值，这对于反射镜和透镜来说是令人感兴趣的。此外，它们是具有非常正的价带的宽带隙半导体，使得这些材料作为太阳能电池的保护涂层和电荷传输层对氧化具有非常高的稳定性。这种依赖于常用且低危害前驱体的简单化学气相沉积方法可为BCN薄膜在光学、光电子学及其他领域的应用开辟道路。
