AI 中文总结
研究人员将碱金属K、Rb、Cs嵌入WTe2得到A0.5WTe2，通过实验与DFT计算证实该类化合物为窄带隙半导体，加深了对TMDCs性质调控的理解并凸显其器件应用潜力。
AI 中文摘要
我们研究了二碲化钨（WTe2）与钾（K）、铷（Rb）、铯（Cs）的阳离子嵌入反应，得到了A0.5WTe2（A=K、Rb、Cs）型嵌入化合物。采用粉末X射线衍射（PXRD）进行结构表征，利用漫反射傅里叶变换红外（DRIFT）光谱和变温电导率测量研究电子性质，开展密度泛函理论（DFT）计算以支撑实验结果并揭示嵌入机制及材料特性。所有合成化合物均呈现窄带隙半导体行为，凸显碱金属嵌入对WTe2电子结构与输运性质的影响。这些结果加深了对过渡金属二硫族化合物（TMDCs）性质调控的基础理解，并凸显其在电子器件应用中的潜力。
英文摘要
We explore the cationic intercalation of tungsten ditelluride (WTe2) with potassium (K), rubidium (Rb), and cesium (Cs), yielding intercalation compounds of the form A0.5WTe2 (A = K, Rb, Cs). Structural characterization was performed using powder X-ray diffraction (PXRD), while diffuse reflectance infrared Fourier transform (DRIFT) spectroscopy and temperature-dependent conductivity measurements were employed to investigate the electronic properties. Density functional theory (DFT) calculations were carried out to support the experimental findings and to provide insight into the intercalation mechanisms and the resulting material characteristics. All synthesized compounds display semiconducting behavior with narrow band gaps, emphasizing the influence of alkali metal intercalation on the electronic structure and transport properties of WTe2. These results advance the fundamental understanding of property modulation in transition-metal dichalcogenides (TMDCs) and highlight their potential for electronic device applications.
Comments13 pages, 18 figures, with supplementary information
Journal refDalton Trans. (2026) 55 (8), 3296-3309
