PHOTOLUMINESCENCE PROPERTIES OF Nd3+, Yb3+ CODOPED Ga2O3 NANOPARTICLES

Year 2023, Volume: 24 Issue: 1, 14 - 22, 29.03.2023

Ayşe Dulda

https://doi.org/10.18038/estubtda.912081

Abstract

The availability of sensitive photon detectors and inexpensive lasers allowed us to explore more efficient fluorescent probes that will work in the second near-infrared optical window. In this study, the optical properties of Nd3+ and Yb3+ co-doped Ga2O3 nanoparticles were studied. In order to indicate the correlation between particle size, crystallinity, and optical property of present samples XRD, TEM, and Photoluminescence analyses were performed. Various excitation wavelengths and dopant concentrations were used to understand the energy transfer mechanism in Nd3+ and Yb3+ co-doped Ga2O3 nanoparticles. As the excitation wavelength increased from 325 nm to 477 and 515 nm, Yb3+ emission peak intensity decreased while Nd3+ emission peak intensity increased. This inverse relationship between the emission intensities of Yb3+ and Nd3+ ion showed the presence of energy transfer between them. The resulting emission peaks were broad and weak, indicating the presence of a non-radiative decay channel due to the crystal defects.

Keywords

Luminescence, Energy Transfer, Gallium Oxide, Near Infrared Emission

Thanks

I would like to thank Prof. Cafer Yavuz and Prof. Jung H. Shin from KAIST (Korean Advanced Institute of Science and Technology) and Prof. Mustafa Selman Yavuz from Selçuk University for their valuable comments and technical supports in optical and structural analysis.

PHOTOLUMINESCENCE PROPERTIES OF Nd3+, Yb3+ CODOPED Ga2O3 NANOPARTICLES

Abstract

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