Two-dimensional (2D) materials with high anisotropic properties, such as black phosphorus and ReS₂, show amazing potential for applications in future nanoelectronic and optoelectronic devices. However, degradation of black phosphorus under ambient conditions and the expensiveness of Re block their application. In this study, another layered material, KP₁₅, that has highly anisotropic properties was successfully prepared. The detailed crystal structure and electron-density distribution calculation reveal that KP₁₅ exhibits an anisotropic layered structure with two rows of P tubes connected by K atoms that are antiparallel in a single layer. Outstanding chemical stability, angular dependence of the Raman response, excitation, and exciton emission at room temperature have been found in exfoliated KP₁₅ nanoribbons. Importantly, the exciton emission at room temperature suggests the existence of a large exciton binding energy. Our results indicate that, because this layered material, KP₁₅, has high anisotropic properties and ultrachemical stability and is derived from abundant raw materials, it has great potential for applications in optoelectronic devices.

中文翻译：

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管状分层剥落KP _15中的高各向异性

具有高各向异性的二维（2D）材料，例如黑磷和ReS ₂，在未来的纳米电子和光电设备中显示出惊人的应用潜力。但是，黑磷在环境条件下的降解和Re的昂贵阻碍了它们的应用。在这项研究中，成功制备了另一种具有高度各向异性的层状材料KP ₁₅。详细的晶体结构和电子密度分布计算表明，KP ₁₅呈现出各向异性的层状结构，其中两排P管通过K原子相互连接，而K原子在单层中反平行。在剥离的KP ₁₅纳米带中发现了出色的化学稳定性，室温下拉曼响应，激发和激子发射的角度依赖性。重要的是，室温下的激子发射表明存在大的激子结合能。我们的结果表明，由于这种层状材料KP ₁₅具有很高的各向异性和超化学稳定性，并且源于丰富的原材料，因此在光电器件中具有巨大的应用潜力。