2D Ti₃C₂-MXene Nanosheets/ZnO Nanorods for UV Photodetectors

Abstract

ZnO nanomaterial-based UV photodetectors (UV PDs) have a long response time and poor responsiveness. The adjustable work function and high conductivity of 2D Ti 3 C 2 -MXene make it a suitable electrode material for optoelectronic devices. In this work, the MXene/ZnO nanorods Schottky junction hybrid was constructed via spin-coating of 2D Ti 3 C 2 -MXene nanosheets deposited on a 1D ZnO nanorods array, increasing the optical absorbance of the UV range. The MXene/ZnO nanorods PD at 368 nm and 5 V bias performs noticeably better with a high on/off ratio of 806, a responsivity of 142.2 mA W −1 , and a specific detectivity of 2.03 × 10 10 jones, which are, respectively, increased by 14.4, 418, and 4194 times than a pure ZnO nanorods PD,. In particular, the rise time and fall times of the MXene/ZnO nanorods PD at 5 V bias are 12.2 s/3.9 s, which are 31 and 76% faster than those of the ZnO nanorods PD, respectively. Developing 2D MXene/ZnO nanorods PDs provides an alternative strategy to improve the response rate and photoelectrical properties of ZnO nanorods PDs over conventional alloy solutions.

Self-Powered Quasi-Solid-State Photoelectrochemical Photodetectors Based on MXene Paper Modified by ZnO Nanostructured Architecture

“…Ti 3 C 2 T x (MXene) is another outstanding material with its high electrical conductivity and light absorption, as well as rich surface functional groups for energy conversion and storage applications. − In an early study on ZnO-MXene nanocomposite manufacturing by a cold sintering method, it was reported that nanocomposites of ZnO-2D materials are of great use in various applications . For instance, constructing MXene composites with ZnO for photocatalytic and electrocatalytic applications has been proven to be a way to enhance system efficiency. , Recently, ZnO nanorods/MXene nanosheets-based PD exhibited high responsivity at 425 mAW -1 . Xie et al reported a PD of ZnO/Sb/MXene having a responsivity and a detectivity of 40 mAW -1 and 8.15 × 10 11 Jones, respectively .…”

Pt Nanoclusters Supported on Ti3C2Tx Nanosheets for the Selective Hydrogenation of Halogenated Nitroarenes under Mild Conditions

“…Ti 3 C 2 T x (T = OH, F) is a member of the MXenes (M n +1 X n T x ) family, which has a unique graphene-like two-dimensional (2D) layered structure . It exhibits the advantage of superior chemical affinity, excellent stability, and high charge transfer efficiency that can be employed as a potential application in energy storage, catalysis, biomedicine, etc. − Importantly, the abundant surface functional groups (such as −OH, −F) generated from the Ti 3 C 2 T x preparation process are beneficial to promote the strong binding and high dispersion of metal on Ti 3 C 2 T x support . Therefore, the robust 2D MXene material, Ti 3 C 2 T x , is regarded as an ideal support for avoiding agglomeration, Oswald ripening, and metal leaching .…”