Modulation of the Optical Properties of Monolayer WS2 by the Single-Atom Sites DOI

S. Li,

Binbin Chen, Yige Yan

et al.

Langmuir, Journal Year: 2025, Volume and Issue: unknown

Published: March 26, 2025

Monolayer tungsten disulfide (ML WS2) exhibits remarkable optical and electrical properties, but its limited light absorption hinders application in next-generation sensors detectors. Therefore, it is vital to design mixed-dimensional heterostructure (MDH) interfaces that enhance overall facilitate the effective transfer of photogenerated carriers simultaneously. In this study, MDHs consisting zero-dimensional (0D) single-site single-tungsten-atom oxides (STAOs) two-dimensional (2D) ML WS2 were successfully constructed. The properties have been comprehensively characterized by using a series techniques including absorption, photoluminescence (PL), Raman techniques. comparison case WS2, both geometric configurations (WS2/STAO/SiO2 STAO/WS2/SiO2) show similar results PL spectra: heterostructures enhanced, meanwhile, STAOs significantly reduce intensity A-exciton while increasing trion-to-exciton ratio. These suggest charge process may occur between STAO due formation interactions. order confirm existence transfer, copper phthalocyanine (CuPc) has chosen as target molecules surface-enhanced spectroscopy (SERS) experiments for configurations. It interesting see signals CuPc almost no enhancement sometimes even quenching effect STAO/WS2, WS2/STAO, they exhibit an amount-dependent exponential trend, with factor up ∼37 at 1531 cm–1 peak. Furthermore, Vienna Ab initio Simulation Package (VASP) theoretical calculations electrons can efficiently from which consistent our experimental results. Our work demonstrates method tuning 2D materials via single sites, providing new strategies evidence employing sensitive multifunctional optoelectronic devices.

Language: Английский

Recent Developments of Advanced Broadband Photodetectors Based on 2D Materials DOI Creative Commons
Yan Tian, Huan Liu, Jing Li

et al.

Nanomaterials, Journal Year: 2025, Volume and Issue: 15(6), P. 431 - 431

Published: March 11, 2025

With the rapid development of high-speed imaging, aerospace, and telecommunications, high-performance photodetectors across a broadband spectrum are urgently demanded. Due to abundant surface configurations exceptional electronic properties, two-dimensional (2D) materials considered as ideal candidates for photodetection applications. However, with both high responsivity fast response time remain challenging issue all researchers. This review paper is organized follows. Introduction introduces fundamental properties performances transition metal dichalcogenides (TMDCs), perovskites, topological insulators, graphene, black phosphorus (BP). section provides an in-depth analysis their unique optoelectronic probes intrinsic physical mechanism detection. In Two-Dimensional Material-Based Broadband Photodetectors, some innovative strategies given expand detection wavelength range 2D material-based enhance overall performances. Among them, chemical doping, defect engineering, constructing heterostructures, strain engineering methods found be more effective improving The last addresses challenges future prospects photodetectors. Furthermore, meet practical requirements very large-scale integration (VLSI) applications, work reliability, production cost compatibility planar technology should paid much attention.

Language: Английский

Citations

0
Modulation of the Optical Properties of Monolayer WS2 by the Single-Atom Sites DOI

S. Li,

Binbin Chen, Yige Yan

et al.

Langmuir, Journal Year: 2025, Volume and Issue: unknown

Published: March 26, 2025

Monolayer tungsten disulfide (ML WS2) exhibits remarkable optical and electrical properties, but its limited light absorption hinders application in next-generation sensors detectors. Therefore, it is vital to design mixed-dimensional heterostructure (MDH) interfaces that enhance overall facilitate the effective transfer of photogenerated carriers simultaneously. In this study, MDHs consisting zero-dimensional (0D) single-site single-tungsten-atom oxides (STAOs) two-dimensional (2D) ML WS2 were successfully constructed. The properties have been comprehensively characterized by using a series techniques including absorption, photoluminescence (PL), Raman techniques. comparison case WS2, both geometric configurations (WS2/STAO/SiO2 STAO/WS2/SiO2) show similar results PL spectra: heterostructures enhanced, meanwhile, STAOs significantly reduce intensity A-exciton while increasing trion-to-exciton ratio. These suggest charge process may occur between STAO due formation interactions. order confirm existence transfer, copper phthalocyanine (CuPc) has chosen as target molecules surface-enhanced spectroscopy (SERS) experiments for configurations. It interesting see signals CuPc almost no enhancement sometimes even quenching effect STAO/WS2, WS2/STAO, they exhibit an amount-dependent exponential trend, with factor up ∼37 at 1531 cm–1 peak. Furthermore, Vienna Ab initio Simulation Package (VASP) theoretical calculations electrons can efficiently from which consistent our experimental results. Our work demonstrates method tuning 2D materials via single sites, providing new strategies evidence employing sensitive multifunctional optoelectronic devices.

Language: Английский

Citations

0