Photonic crystallization of two-dimensional MoS2 for stretchable photodetectors

Richard Hahnkee Kim, Juyoung Leem, Christopher Muratore, Sung Woo Nam, Rahul Rao, Ali Jawaid, Michael Durstock, Michael McConney, Lawrence Drummy, Rachel Rai, Andrey Voevodin, Nicholas Glavin

Research output: Contribution to journalArticlepeer-review


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 MoS2 and subsequent large area (>6.25 cm2) photonic crystallization of 5 nm 2H-MoS2 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 MoS2 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.

Original languageEnglish (US)
Pages (from-to)13260-13268
Number of pages9
Issue number28
StatePublished - Jul 28 2019

ASJC Scopus subject areas

  • General Materials Science


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