Band alignment study of 2D-2D heterointerface of MoSe2 with Ti3C2Tx (transport layer) for flexible broadband photodetection

Polumati, Gowtham; Adepu, Vivek; Kolli, Chandra Sekhar Reddy; Reji, Jeevan; Sahatiya, Parikshit

doi:10.1016/j.mssp.2022.107161

Cited by 14 publications

(7 citation statements)

References 46 publications

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“…Also, by doping the device with external dopants, these surface states which were on the atomic layers of solid device are replaced by the dopant atoms consequently enhancing the device performance [12,13]. Conventional photodetectors suffer from a lot of drawbacks like low absorption, defects that are formed during fabrication process, poor responsivity, expensive synthesis procedures which makes them unsuitable in many applications in demand [14][15][16][17]. Hence there is a need to search for new material which will have suitable properties that can serve the purpose, and one such materials are 2D materials.…”

Section: Introductionmentioning

confidence: 99%

Engineering surface state density of monolayer CVD grown 2D MoS2 for enhanced photodetector performance

Polumati,

Kolli,

de Luna Bugallo

et al. 2024

PLoS ONE

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This study demonstrates the effect of nitrogen doping on the surface state densities (Nss) of monolayer MoS2 and its effect on the responsivity and the response time of the photodetector. Our experimental results shows that by doping monolayer MoS2 by nitrogen, the surface state (Nss) increases thereby increasing responsivity. The mathematical model included in the paper supports the relation of photocurrent gain and its dependency on trap level which states that the increasing the trap density increases the photocurrent gain and the same is observed experimentally. The experimental results at room temperature revealed that nitrogen doped MoS2 have a high NSS of 1.63 X 1013 states/m2/eV compared to undoped MoS2 of 4.2 x 1012 states/m2/eV. The increase in Nss in turn is the cause for rise in trap states which eventually increases the value of photo responsivity from 65.12 A/W (undoped MoS2) to 606.3 A/W (nitrogen doped MoS2). The response time calculated for undoped MoS2 was 0.85 sec and for doped MoS2 was 0.35 sec. Finally, to verify the dependence of surface states on the responsivity, the surface states were varied by varying temperature and it was observed that upon increment in temperature, the surface states decreases which causes the responsivity values also to decrease.

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Section: Introductionmentioning

confidence: 99%

Engineering surface state density of monolayer CVD grown 2D MoS2 for enhanced photodetector performance

Polumati,

Kolli,

de Luna Bugallo

et al. 2024

PLoS ONE

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“…Analyzing the heterostructure by ultraviolet photoelectron spectroscopy and extracting the real-time band structures open new pathways for researchers to select the appropriate materials for the transport layer with potential applications in the field of optoelectronics and solar cells. 122…”

Section: Two-dimensional Tmd/mxene-based Photodetectorsmentioning

confidence: 99%

Recent advances in 2D transition metal dichalcogenide-based photodetectors: a review

Ahmed,

Zahir Iqbal,

Dahshan

et al. 2024

Nanoscale

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“…The differences are due to the flake-to-flake variation in the single CVD run. Spectral responsivity is defined as the ability of a device to convert incident light energy into the corresponding electrical energy at the respective wavelengths 53 (unit: A/W).…”

Section: ■ Introductionmentioning

confidence: 99%

Mixed-Dimensional van der Waals Heterostructure (2D ReS₂/0D MoS₂ Quantum Dots)-Based Broad Spectral Range with Ultrahigh-Responsive Photodetector

Polumati,

Kolli,

Flores

et al. 2024

ACS Appl. Mater. Interfaces

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The remarkable properties of two-dimensional (2D) materials have led to significant advancements in photodetection and optoelectronics research. Currently, there are many successful methods that are employed to improve the responsivity of photodetectors, but the limited spectral range of the device remains a limitation. This work demonstrates the development of a mixed-dimensional (2D/0D) hybrid photodetector device fabricated using chemical vapor deposition (CVD)-grown monolayer ReS 2 and solution-processed MoS 2 quantum dots (QDs). The mixed dimensionality of 2D (ReS 2 ) and zero-dimensional (0D) MoS 2 QDs assist in improving the spectral range of the device [ultraviolet (360 nm) to nearinfrared (780 nm)]. Further, due to the work function difference between ReS 2 and MoS 2 QDs, the built-in electric field across the mixed-dimensional interface promotes effective charge separation and migration, resulting in improved responsivities of the device. The calculated responsivities of the fabricated photodetector are 5.4 × 10 2 , 3.3 × 10 2 , and 2.6 × 10 2 A/W when subjected to visible, UV, and NIR light illumination, which is remarkable when compared to the existing reports on broadband photodetection. The mixed-dimensionality heterostructure coupled with contact engineering paves the way for highly responsive broadband photodetectors for potential applications in security, healthcare, etc.

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Band alignment study of 2D-2D heterointerface of MoSe2 with Ti3C2Tx (transport layer) for flexible broadband photodetection

Cited by 14 publications

References 46 publications

Engineering surface state density of monolayer CVD grown 2D MoS2 for enhanced photodetector performance

Engineering surface state density of monolayer CVD grown 2D MoS2 for enhanced photodetector performance

Recent advances in 2D transition metal dichalcogenide-based photodetectors: a review

Mixed-Dimensional van der Waals Heterostructure (2D ReS₂/0D MoS₂ Quantum Dots)-Based Broad Spectral Range with Ultrahigh-Responsive Photodetector

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Band alignment study of 2D-2D heterointerface of MoSe2 with Ti3C2Tx (transport layer) for flexible broadband photodetection

Cited by 14 publications

References 46 publications

Engineering surface state density of monolayer CVD grown 2D MoS2 for enhanced photodetector performance

Engineering surface state density of monolayer CVD grown 2D MoS2 for enhanced photodetector performance

Recent advances in 2D transition metal dichalcogenide-based photodetectors: a review

Mixed-Dimensional van der Waals Heterostructure (2D ReS2/0D MoS2 Quantum Dots)-Based Broad Spectral Range with Ultrahigh-Responsive Photodetector

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Product

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Mixed-Dimensional van der Waals Heterostructure (2D ReS₂/0D MoS₂ Quantum Dots)-Based Broad Spectral Range with Ultrahigh-Responsive Photodetector