Proceedings of The XXVIII Annual International Conference "Saratov Fall Meeting 2024", September 23-27, 2024, Saratov, Russia. Advanced materials in optoelectronics, laser physics, and photonics
Condensed matter spectroscopy

Effect of internal charging on cathodoluminescence profiling capability: boron-implanted $\beta$-Ga$_2$O$_3$

A. A. Tatarintsev^ab, A. E. Ieshkin^a, E. Yu. Zykova^a, N. G. Orlikovsaya^a, V. A. Kiselevskii<sup>bc

a</sup> Lomonosov Moscow State University
^b National Research Centre "Kurchatov Institute", Moscow
^c V. G. Mokerov Institute of Ultra High Frequency Semiconductor Electronics of RAS, Moscow

Abstract: The effect of sample electrification by an electron beam on the integral intensity of cathodoluminescence and on the shape of the emission spectrum is investigated in the work. For this purpose, using the example of Fe:$\beta$-Ga$_2$O$_3$ implanted with boron, the results of cathodoluminescence measurements are compared for three series of experiments: when the surface of the sample under study was not grounded, grounded, or covered with a conductive grounded film. The studies have shown that even when using a metal film, the accumulation of charge under it can distort the shape of the spectrum. Such a distortion of the spectra during a cathodoluminescence study with depth resolution will lead to an incorrect determination of the defect concentration profiles. Comparison of the spectra sequentially recorded with an increase in the electron beam energy and then with a decrease in energy can be proposed as a quick criterion for assessing the effect of charging on the quality of luminescent center profiling.

Keywords: gallium oxide, cathodoluminescence, internal charging, boron implantation, defect profiling.

Received: 05.12.2024
Revised: 09.12.2024
Accepted: 10.12.2024

DOI: 10.61011/OS.2025.03.60238.139-24

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