Recommended Citation
Park, Sewon; Ji, Jaehoon; Cunningham, Connor; Pillai, Srajan; Rouillon, Jean; Benitez-Martin, Carlos; Fang, Mengqi; Yang, Eui-Hyeok; Andreasson, Joakim; You, Jeong Ho; and Choi, Jong Hyun, "Photoswitchable optoelectronic properties of 2D MoSe2/diarylethene hybrid structures" (2024). Purdue University Libraries Open Access Publishing Fund. Paper 205.
http://dx.doi.org/10.1038/s41598-024-57479-z
DOI
10.1038/s41598-024-57479-z
Date of this Version
3-27-2024
Keywords
Transition metal dichalcogenide, MoSe2, Optoelectronics, Photoswitch, Photochromic molecules, diarylethene
Abstract
The ability to modulate optical and electrical properties of two-dimensional (2D) semiconductors has sparked considerable interest in transition metal dichalcogenides (TMDs). Herein, we introduce a facile strategy for modulating optoelectronic properties of monolayer MoSe2 with external light. Photochromic diarylethene (DAE) molecules formed a 2-nm-thick uniform layer on MoSe2, switching between its closed- and open-form isomers under UV and visible irradiation, respectively. We have discovered that the closed DAE conformation under UV has its lowest unoccupied molecular orbital energy level lower than the conduction band minimum of MoSe2, which facilitates photoinduced charge separation at the hybrid interface and quenches photoluminescence (PL) from monolayer flakes. In contrast, open isomers under visible light prevent photoexcited electron transfer from MoSe2 to DAE, thus retaining PL emission properties. Alternating UV and visible light repeatedly show a dynamic modulation of optoelectronic signatures of MoSe2. Conductive atomic force microscopy and Kelvin probe force microscopy also reveal an increase in conductivity and work function of MoSe2/DAE with photoswitched closed-form DAE. These results may open new opportunities for designing new phototransistors and other 2D optoelectronic devices.
Comments
This is the publisher PDF of Park, S., Ji, J., Cunningham, C. et al. Photoswitchable optoelectronic properties of 2D MoSe2/diarylethene hybrid structures. Scientific Reports 14, 7325 (2024). This article is distributed under a CC-BY-NC-ND license, and is available at DOI: 10.1038/s41598-024-57479-z.