CUED Publications database

High Responsivity, Large-Area Graphene/MoS2 Flexible Photodetectors.

De Fazio, D and Goykhman, I and Yoon, D and Bruna, M and Eiden, A and Milana, S and Sassi, U and Barbone, M and Dumcenco, D and Marinov, K and Kis, A and Ferrari, AC (2016) High Responsivity, Large-Area Graphene/MoS2 Flexible Photodetectors. ACS Nano, 10. pp. 8252-8262.

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We present flexible photodetectors (PDs) for visible wavelengths fabricated by stacking centimeter-scale chemical vapor deposited (CVD) single layer graphene (SLG) and single layer CVD MoS2, both wet transferred onto a flexible polyethylene terephthalate substrate. The operation mechanism relies on injection of photoexcited electrons from MoS2 to the SLG channel. The external responsivity is 45.5A/W and the internal 570A/W at 642 nm. This is at least 2 orders of magnitude higher than bulk-semiconductor flexible membranes. The photoconductive gain is up to 4 × 10(5). The photocurrent is in the 0.1-100 μA range. The devices are semitransparent, with 8% absorptance at 642 nm, and are stable upon bending to a curvature of 1.4 cm. These capabilities and the low-voltage operation (<1 V) make them attractive for wearable applications.

Item Type: Article
Uncontrolled Keywords: MoS2 flexible optoelectronics graphene heterostructures photodetectors
Divisions: Div B > Solid State Electronics and Nanoscale Science
Depositing User: Cron Job
Date Deposited: 17 Jul 2017 18:57
Last Modified: 22 Jun 2018 20:31