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Title: Photonic crystallization of two-dimensional MoS 2 for stretchable photodetectors
Low temperature synthesis of high quality two-dimensional (2D) materials directly on flexible substrates remains a fundamental limitation towards scalable realization of robust flexible electronics possessing the unique physical properties of atomically thin structures. Herein, we describe room temperature sputtering of uniform, stoichiometric amorphous MoS 2 and subsequent large area (>6.25 cm 2 ) photonic crystallization of 5 nm 2H-MoS 2 films in air to enable direct, scalable fabrication of ultrathin 2D photodetectors on stretchable polydimethylsiloxane (PDMS) substrates. The lateral photodetector devices demonstrate an average responsivity of 2.52 μW A −1 and a minimum response time of 120 ms under 515.6 nm illumination. Additionally, the surface wrinkled, or buckled, PDMS substrate with conformal MoS 2 retained the photoconductive behavior at tensile strains as high as 5.72% and over 1000 stretching cycles. The results indicate that the photonic crystallization method provides a significant advancement in incorporating high quality semiconducting 2D materials applied directly on polymer substrates for wearable and flexible electronic systems.  more » « less
Award ID(s):
1720633
PAR ID:
10147014
Author(s) / Creator(s):
; ; ; ; ; ; ; ; ; ; ;
Date Published:
Journal Name:
Nanoscale
Volume:
11
Issue:
28
ISSN:
2040-3364
Page Range / eLocation ID:
13260 to 13268
Format(s):
Medium: X
Sponsoring Org:
National Science Foundation
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