In2O3/InN core-shell heterostructure nanorods grown on V-grooved Si(111) substrate for the augmented self-powered UV photodetectors

Na-hyun Bak; Kedhareswara Sairam Pasupuleti; Yun-Hae Shim; Moon-Deock Kim

doi:10.1117/12.3005331

16 March 2024 In₂O₃/InN core-shell heterostructure nanorods grown on V-grooved Si(111) substrate for the augmented self-powered UV photodetectors

Na-hyun Bak, Kedhareswara Sairam Pasupuleti, Yun-Hae Shim, Moon-Deock Kim

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Proceedings Volume PC12887, Oxide-based Materials and Devices XV; PC128870M (2024) https://doi.org/10.1117/12.3005331
Event: SPIE OPTO, 2024, San Francisco, California, United States

Abstract

Core–shell heterostructures have attracted extensive attention in the photoelectric field because of their improved optoelectrical properties. In this study, we report a novel self-powered ultraviolet (UV) photodetector based on In2O3/InN nanorods (NRs) core-shell heterostructure developed on the corrugated V-grooved Si (100) substrate. Under 365 nm UV light the hybrid heterostructure demonstrates remarkable photo-to-dark current ratio, high detectivity (64.85 A/W), responsivity (8.5 × 1012 Jones) excellent external quantum efficiency (9.15 × 103 %) and fast rising/falling times in a self-driven mode (0 V). This remarkable photoelectric detection capability is attributed to the strong absorption and abundant trapping of UV light by the multiple scattering of V-grooved texture and formation type-II heterojunction between the In2O3 and InN NRs core-shell structure resulting self-power mode, which enable notable charge separation and fast electron transfer. These accomplishments set the stage for future optoelectronic applications of III-nitride based core-shell heterostructure UV photodetectors that are self-powered.

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Na-hyun Bak, Kedhareswara Sairam Pasupuleti, Yun-Hae Shim, and Moon-Deock Kim "In₂O₃/InN core-shell heterostructure nanorods grown on V-grooved Si(111) substrate for the augmented self-powered UV photodetectors", Proc. SPIE PC12887, Oxide-based Materials and Devices XV, PC128870M (16 March 2024); https://doi.org/10.1117/12.3005331

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KEYWORDS

Ultraviolet radiation

Photodetectors

Heterojunctions

Nanorods

Indium nitride

Light absorption

Surface plasmons

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