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MBE growth of highly sensitive silicon PIN diode with Magnetic Mn-doped Ge quantum dots for photodete

Author name : Makrem . . Yahyaoui
Publication Date : 2024-09-30
Journal Name : Applied Physics A

Abstract

For the first time, this work reports the fabrication of a p+-i-n + diode with a magnetic Mn-doped Ge quantum embedded in its intrinsic layer for photodetection and photovoltaic applications. The diode with Mn-doped Ge quantum dots is epitaxied by an ultra-high vacuum molecular beam epitaxy (UHV-MBE) reactor on a silicon substrate. Using atomic force microscopy and a superconducting quantum interference device to study the shape and magnetic properties of the Mn-doped Ge QDs revealed that they are uniform, dense, and ferromagnetic. The new p+-i-n + photodiode has a high rectification ratio of > 100 at a bias voltage of Vb = ± 1 V, a high breakdown voltage of 12 V, an ideality factor of n = 1.86, a Schottky barrier height of ϕB = 0.72 eV, and a broad spectral response in the visible with a high photocurrent/dark ratio of about 100. These original results pave the way for the real integration of magnetic Mn-doped Ge quantum dots in advanced optoelectronic and spintronic devices.

Keywords

Pin diode, MO doped Ge quantum dots, Photodetector, Stranski krastanov

Publication Link

https://doi.org/10.1007/s00339-024-07926-5

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