Bismuth-doped gadolinium oxide films for UV-Vis multicolor conversion: Combined XPS, DFT and photoluminescence study
Source abstract
Abstract
Results of XPS characterization, theoretical modeling and photoluminescence study of bismuth-implanted gadolinium oxide (Gd2O3:Bi) films are presented. Scenarios for the introduction of bismuth ions into amorphous-crystalline Gd2O3 host and mechanisms for the formation of optically active centers are considered. It has been demonstrated that the optical properties of Gd2O3:Bi films are guided by the interplay of a quite complex system of single Bi2+ ions, (Bi3+–Bi3+) pairs and single Bi3+-ions, oxygen vacancies and “defective” gadolinium ions. Photoinduced excitation-relaxation processes involving various Bi-related centers and defect states of the host are observed. Due to the multicolor emission (red, green and blue) of single Bi2+ ions, (Bi3+- Bi3+) pairs and single Bi3+ ions excited in the ultraviolet spectral range, the UV–VIS energy conversion in a wide spectral range is realized. The advantage of Gd2O3:Bi as a material for energy conversion lies in the fact that due to the polyvalence of bismuth and the variety of different optical centers, a wide range of both absorbed UV light and emitted VIS light is involved in the conversion. This indicates the prospects for practical use of Gd2O3:Bi films as multifunctional material for energy conversion and photo-detection systems. © 2023 Elsevier B.V.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Luminescence Properties of Advanced Materials · Glass properties and applications · Ga2O3 and related materials
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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