DataVXphysica status solidi (RRL) – Rapid Research LettersPaper
journal article·2024-01Open access

Iridium/Silicon Ultrathin Film for Ultraviolet Photodetection: Harnessing Hot Plasmonic Effects

Mohamed A. Basyooni, Mohammed Tihtih, Issam Boukhoubza, Jamal Eldin F. M. Ibrahim, Redouane En-nadir, Ahmed M. Abdelbar, Khalid Rahmani, Shrouk E. Zaki, Şule Ateş, Yasin Ramazan Eker

physica status solidi (RRL) – Rapid Research Letters· Volume 18· Issue 1
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Source abstract

Abstract

The phenomenon of hot carriers, which are generated through the nonradiative decay of surface plasmons in ultrathin metallic films, offers an intriguing opportunity for subbandgap photodetection even at room temperature. These hot carriers possess sufficient energy to inject into the conduction band of a semiconductor material. The groundbreaking use of iridium (Ir) ultrathin film as an ultraviolet (UV) plasmonic material on silicon (Si) for high‐performance photodetectors (PHDs) has been successfully demonstrated. Elevating the thickness of the sputtered Ir film to 4 nm yields a notable surge in photocurrent, registering an impressive 600 μA under 365 nm UV illumination with electron mobility of 1.37E3 cm2 V−1 s. This PHD exhibits excellent OFF‐ON photoresponses at various applied voltages ranging from 0 to 5 V, maintaining a stable photocurrent. Under UV illumination, it displays exceptional performance, achieving a high detectivity of 1.25E14 Jones and a responsivity of 1.28 A W−1. These outstanding results underscore the significant advantages of increasing the thickness of the Ir film in PHDs, leading to improvements in conductivity, detectivity, external quantum efficiency, responsivity, as well as superior sensitivity for light detection.
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Research context

Electronic materials

OpenAlex topics: Plasmonic and Surface Plasmon Research · Nanowire Synthesis and Applications · Optical Coatings and Gratings

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Department of Nanotechnology and Advanced Materials Graduate School of Applied and Natural Science Selçuk University Konya 42030 Turkey

Science and Technology Research and Application Center (BITAM) Necmettin Erbakan University Konya 42090 Turkey

Solar and Space Research Department National Research Institute of Astronomy and Geophysics (NRIAG) Helwan Cairo 11421 Egypt

Institute of Ceramics and Polymer Engineering University of Miskolc Miskolc H-3515 Egyetemváros Hungary

National Institute of Materials Physics Atomistilor 405A 077125 Magurele Romania

Laboratory of Solid-State Physics Faculty of Sciences Dhar el Mahraz University Sidi Mohammed Ben Abdellah PO Box 1796, Atlas Fez 30 000 Morocco

Department of Astronomy and Metrology Faculty of Science Al-Azhar University Cairo 11651 Egypt

Department of Physics Ecole Normale Supérieure (ENS) Mohammed V University Rabat 8007.N.U Morocco

Department of Physics Faculty of Science Selçuk University Konya 42075 Turkey

Department of Basic Sciences Faculty of Engineering Necmettin Erbakan University Konya 42090 Turkey

Funding

Selçuk University Research Foundation

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