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- W2892011970 abstract "We report on the low-temperature photoconductive properties of few layer p-type tungsten diselenide (WSe2) field-effect transistors (FETs) synthesized using the chemical vapor transport method. Photoconductivity measurements show that these FETs display room temperature photo-responsivities of ∼7 mAW-1 when illuminated with a laser of wavelength λ = 658 nm with a power of 38 nW. The photo-responsivities of these FETs showed orders of magnitude improvement (up to ∼1.1 AW-1 with external quantum efficiencies reaching as high as ∼188%) upon application of a gate voltage (V G = -60 V). A temperature dependent (100 K < T < 300 K) photoconductivity study reveals a weak temperature dependence of responsivity for these WSe2 phototransistors. We demonstrate that it is possible to obtain stable photo-responsivities of ∼0.76 ± 0.2 AW-1 (with applied V G = -60 V), at low temperatures in these FETs. These findings indicate the possibility of developing WSe2-based FETs for highly robust, efficient, and swift photodetectors with a potential for optoelectronic applications over a broad range of temperatures." @default.
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- W2892011970 date "2018-10-01" @default.
- W2892011970 modified "2023-10-05" @default.
- W2892011970 title "Low temperature photoconductivity of few layer <i>p</i>-type tungsten diselenide (WSe<sub>2</sub>) field-effect transistors (FETs)" @default.
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- W2892011970 doi "https://doi.org/10.1088/1361-6528/aae049" @default.
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