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- W2890700480 abstract "Two-dimensional (2D) nanosheets of transition metal dichalcogenides (TMDs) are of significant interest for potential photoelectronic applications. However, the fabrication of solution-processed arrays of mechanically flexible thin TMD films-based vertical type p-n junction photodetectors over a large area is a great challenge. Our method is based on controlled solvent evaporation of MoSe2 suspension spread on water surface. Single or few-layered MoSe2 nanosheets modified with the dispersant amine-terminated poly(styrene) (PS-NH2) were homogeneously deposited and stacked on water upon solvent evaporation, giving rise to uniform MoSe2/PS-NH2 composite films that can be readily transferred onto other substrates. A p-n junction vertical diode of Al/p-type Si/p-type poly(9,9-di- n-octylfluorenyl-2,7-diyl)/n-type MoSe2 composite/Au stacked from bottom to top exhibited characteristic rectifying current behavior upon voltage sweep with a rectification ratio of 103. Subsequent illumination of near-infrared light on the device resulted in a substantially enhanced dark current of approximately 103 times greater than that of the nonexposed device. The photodetection performance, that is, switching time, responsivity, and detectivity, were 100.0 ms, 2.5 AW-1, and 2.34 × 1014, respectively. Furthermore, the performance of mechanically flexible photodetectors devices was comparable with that of the devices fabricated on the hard Si substrate even after 1000 bending cycles at a bending diameter of 7.2 mm." @default.
- W2890700480 created "2018-09-27" @default.
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- W2890700480 date "2018-09-11" @default.
- W2890700480 modified "2023-10-17" @default.
- W2890700480 title "Flexible Vertical p–n Diode Photodetectors with Thin N-type MoSe<sub>2</sub> Films Solution-Processed on Water Surfaces" @default.
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- W2890700480 doi "https://doi.org/10.1021/acsami.8b07279" @default.
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