用于宽带隙二维氧化镍的超薄氢氧化镍热转化法
Thermal conversion of ultrathin nickel hydroxide for wide bandgap 2D nickel oxides
AI总结：
本研究针对大尺寸二维过渡金属氧化物稀缺的问题，以超薄氢氧化镍为前驱体热转化合成了大畴尺寸宽带隙二维氧化镍，并系统表征了转化过程的结构形貌变化及产物电子结构，拓展了二维过渡金属氧化物家族。
摘要：
宽带隙（WBG）半导体（带隙Eg >2.0 eV）因具备高温运行、高击穿电压和高效发光的能力，是下一代电子、光电子和电力工业发展的核心组成部分。通过器件小型化，尤其是借助宽带隙二维半导体将器件制造集成到二维（2D）结构中，可提升功率效率和功能性能。然而，作为宽带隙半导体的重要子类，二维过渡金属氧化物（TMOs）的物理性质及其在二维光电器件中的应用仍远未得到充分探索，主要原因是缺乏尺寸足够大的二维晶体。因此，本研究的目标是开发合成大晶畴（例如>10 nm）二维过渡金属氧化物的路径，拓展二维过渡金属氧化物家族，并为未来二维过渡金属氧化物的工程化应用提供参考。本研究展示了由横向畴尺寸大于10 μm的二维氢氧化镍（Ni(OH)₂）热转化合成宽带隙二维氧化镍（NiO）（Eg > 2.7 eV）的方法。此外，研究利用原子力显微镜（AFM）、拉曼光谱、透射电子显微镜（TEM）和X射线光电子能谱（XPS）等多种显微技术对转化过程进行了探究，深入揭示了不同氧化条件下的形貌和结构变化。研究还通过X射线吸收谱（XAS）和发射谱（XES）等多种软X射线光谱技术，进一步研究了转化得到的NiₓOᵧ的电子结构。
英文摘要：
Wide bandgap (WBG) semiconductors (Eg >2.0 eV) are integral to the advancement of next generation electronics, optoelectronics, and power industries, owing to their capability for high temperature operation, high breakdown voltage and efficient light emission. Enhanced power efficiency and functional performance can be attained through miniaturization, specifically via the integration of device fabrication into two-dimensional (2D) structure enabled by WBG 2D semiconductors. However, as an essential subgroup of WBG semiconductors, 2D transition metal oxides (TMOs) remain largely underexplored in terms of physical properties and applications in 2D opto-electronic devices, primarily due to the scarcity of sufficiently large 2D crystals. Thus, our goal is to develop synthesis pathways for 2D TMOs possessing large crystal domain (e.g. >10 nm), expanding the 2D TMOs family and providing insights for future engineering of 2D TMOs. Here, we demonstrate the synthesis of WBG 2D nickel oxide (NiO) (Eg > 2.7 eV) thermally converted from 2D nickel hydroxide (Ni(OH)2) with the lateral domain size larger than 10 um. Moreover, the conversion process is investigated using various microscopic techniques such as atomic force microscopy (AFM), Raman spectroscopy, transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS), providing significant insights on the morphology and structure variation under different oxidative conditions. The electronic structure of the converted NixOy is further investigated using multiple soft X-ray spectroscopies, such as X-ray absorption (XAS) and emission spectroscopies (XES).
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
