Characterization of composition dependence of properties of a MgNiO-based MSM structure

TY - JOUR

T1 - Characterization of composition dependence of properties of a MgNiO-based MSM structure

AU - Doğan, Ümit

AU - Sarcan, Fahrettin

AU - Hut, Elanur

AU - Achinuq, Barat

AU - Althumali, Ahmad

AU - Aldawood, Ibrahim

AU - Kerrigan, Adam

AU - Lazarov, Vlado K.

AU - Erol, Ayşe

N1 - © 2024 The Author(s)

PY - 2024/9/1

Y1 - 2024/9/1

N2 - In this study, the effect of Mg composition on structural and optical properties of MgxNi1-xO alloy thin film single crystal semiconductors as well as their implementation into Metal-Semiconductor-Metal (MSM) photodetector are studied. An 850 meV blue-shift of the bandgap is observed from 3.65 eV to 4.50 eV with increasing Mg composition from 0% to 67%. The deep ultraviolet/visible rejection ratio, which is the ratio of photosensitivity at a peak wavelength of 360 nm to that at 450 nm is found to be ∼58 for Mg composition of 67%. Mg rich (%67 Mg) alloy-based photodetector is found to have two orders smaller dark current and have higher spectral response compared to NiO-based one. Spectral responsivities for MgxNi1-xO photodetectors are determined as 415 mA W−1, 80 mA W−1, and 5.6 mA W−1 for Mg compositions of 67%, 21%, and 0% (reference-NiO), respectively. Furthermore, the detectivity of the photodetectors enhances as Mg composition increases and the highest detectivity of a magnitude of ∼1011 Jones is found for the photodetector with Mg composition of 67%.

AB - In this study, the effect of Mg composition on structural and optical properties of MgxNi1-xO alloy thin film single crystal semiconductors as well as their implementation into Metal-Semiconductor-Metal (MSM) photodetector are studied. An 850 meV blue-shift of the bandgap is observed from 3.65 eV to 4.50 eV with increasing Mg composition from 0% to 67%. The deep ultraviolet/visible rejection ratio, which is the ratio of photosensitivity at a peak wavelength of 360 nm to that at 450 nm is found to be ∼58 for Mg composition of 67%. Mg rich (%67 Mg) alloy-based photodetector is found to have two orders smaller dark current and have higher spectral response compared to NiO-based one. Spectral responsivities for MgxNi1-xO photodetectors are determined as 415 mA W−1, 80 mA W−1, and 5.6 mA W−1 for Mg compositions of 67%, 21%, and 0% (reference-NiO), respectively. Furthermore, the detectivity of the photodetectors enhances as Mg composition increases and the highest detectivity of a magnitude of ∼1011 Jones is found for the photodetector with Mg composition of 67%.

KW - MBE

KW - metal-semiconductor-metal

KW - MgNiO

KW - MSM

KW - photoconductivity

KW - photodetector

KW - UV

UR - http://www.scopus.com/inward/record.url?scp=85202290876&partnerID=8YFLogxK

U2 - 10.1088/1402-4896/ad6e3d

DO - 10.1088/1402-4896/ad6e3d

M3 - Article

AN - SCOPUS:85202290876

SN - 0031-8949

VL - 99

JO - Physica Scripta

JF - Physica Scripta

IS - 9

M1 - 095974

ER -