Controllable growth of two-dimensional wrinkled WSe2 nanostructures via chemical vapor deposition based on thermal mismatch strategy

Abstract

Two-dimensional (2D) transition metal dichalcogenides (TMDs) semiconductors are considered to be promising candidates for extending Moore's law. 2D TMDs with tunable wrinkled nanostructures can effectively modulate their optoelectronic properties. However, the controlled synthesis of large-area TMDs wrinkled nanostructures remains a major challenge. In this work, 2D WSe2 wrinkled nanostructures were prepared on soda-lime glass substrate by ambient pressure chemical vapor deposition based on the thermal mismatch-induced strategy. WSe2 wrinkled nanostructures can be further precisely controlled by adjusting the growth temperature and substrate thickness. In addition, the growth mechanism of WSe2 wrinkled nanostructures was revealed according to systematic experimental characterization. Corresponding results indicate that the photoluminescence and surface potential of WSe2 were associated with wrinkled nanostructures. The controllable synthesis strategy of 2D WSe2 wrinkled nanostructures has been developed, which can provide important experimental and theoretical support for exploring the applications of 2D wrinkled nanostructures in the field of strain sensing, optoelectronics, and nonlinear optical devices.