WSe2 crystals on paper: flexible, large area and broadband photodetectors

The paper-based photodetector has recently captivated a great deal of attention in various opto-electronics applications because of facile, cost effective and green synthesis. Two-dimensional transition metal dichalcogenides materials are promising for photodetection under the broad spectral range. In this work, we have fabricated paper-based device by rubbing the tungsten di-selenide (WSe2) crystals on paper substrate. Low-cost, facile and green synthesis technique was employed to make a high-performance paper-based WSe2 photodetector. Paper-based photodetector was fabricated via non-toxic simply rubbing process of WSe2 nanosheets on low-cost bio-degradable paper. The photodetector shows good responsivity of 72.5 mu A W-1 and detectivity at around 2.4 x 10(7) Jones at very low bias (1.0 V) at wavelength of 780 nm, respectively. Due to good photo-absorption strength, photodetector exhibits excellent photo-response over wide wavelength range from visible to near infrared. This device also shows very good flexibility with a stable photo-response. This device shows a general and reliable study for the design of photodetectors that is eco-friendly and cost-effective. Overall studied results of the fabricated device indicate that they have the ability to be used in large-scale preparation of the device.

Automated summary

The study focuses on fabricating a high-performance paper-based WSe2 photodetector using a low-cost, facile and green synthesis technique. The device demonstrates good responsivity and detectivity at a wide wavelength range, showing excellent photo-response from visible to near infrared. The study indicates the potential for large-scale preparation of eco-friendly and cost-effective photodetectors.