Nag Riya, Saha Raima, Layek Rama Kanta, Bera Abhijit
Department of Physics, Midnapore College (Autonomous), Raja Bazar Main Rd, 721101 Midnapore, India.
School of Engineering Science, Department of Separation Science, LUT University, FI-15210 Lahti, Finland.
J Phys Condens Matter. 2024 Jan 4;36(13). doi: 10.1088/1361-648X/ad172e.
Two-dimensional materials garner increasing interest in next-generation electronics and optoelectronic devices due to their atomic-thin nature and distinctive physical properties. Building on these advances, we present the successful synthesis of a heterostructure composed of the semi-metallic TiC-MXene and the semiconducting WSe, in which the atomic layers are vertically aligned. The wet impregnation method effectively synthesizes an atomically thin TiC-MXene/WSeheterostructure characterized by atomic force microscopy, Raman and time-resolved photoluminescence (TRPL) analysis. In addition, the current-voltage characteristics at the heterostructure reveal the Schottky junction probed by the scanning tunnelling microscopy and the conductive atomic force microscopy tip. The Schottky heterojunction also exhibits enhanced photocatalytic properties by improving the photogenerated charge carriers and inhibiting recombination. This work demonstrates the unique 2D-2D TiC-MXene/WSevertical heterojunction possesses superior photon trapping ability and can efficiently transport photogenerated charge carriers to the reaction sites to enhance photocatalysis performance.
二维材料因其原子级薄的特性和独特的物理性质，在下一代电子和光电器件中引起了越来越多的关注。基于这些进展，我们成功合成了一种由半金属TiC-MXene和半导体WSe₂组成的异质结构，其中原子层垂直排列。湿浸渍法有效地合成了一种原子级薄的TiC-MXene/WSe₂异质结构，通过原子力显微镜、拉曼光谱和时间分辨光致发光（TRPL）分析对其进行了表征。此外，异质结构的电流-电压特性揭示了通过扫描隧道显微镜和导电原子力显微镜探针探测到的肖特基结。该肖特基异质结还通过改善光生载流子并抑制复合表现出增强的光催化性能。这项工作表明，独特的二维-二维TiC-MXene/WSe₂垂直异质结具有优异的光子捕获能力，并且可以有效地将光生载流子传输到反应位点以增强光催化性能。
