期刊
ACS NANO
卷 10, 期 9, 页码 8252-8262出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsnano.6b05109
关键词
photodetectors; graphene; MoS2; heterostructures; flexible optoelectronics
类别
资金
- EU Graphene Flagship
- ERC Grant Hetero2D
- EPSRC [EP/509 K01711X/1, EP/K017144/1, EP/N010345/1, EP/M507799/5101, EP/L016087/1]
- Swiss SNF Sinergia [147607]
- Marie Curie ITN network MoWSeS [317451]
- EPSRC [EP/K017144/1, EP/M507799/1, EP/N010345/1, EP/K01711X/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/M507799/1, EP/N010345/1, 1354817, EP/K01711X/1, EP/K017144/1] Funding Source: researchfish
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 x 10(5). The photocurrent is in the 0.1-100 mu A 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.
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