The luminescence study of Sc2(1–x)Ga2xO3:Cr3+/4+ coumpounds

Opis

The growing interest in the use of near-infrared (NIR) radiation for spectroscopy, optical communication, and medical applications spanning both NIR-I (700–900 nm) and NIR-II (900–1700 nm) has driven the need for new NIR light sources. NIR phosphor-converted light-emitting diodes (pc-LEDs) are expected to replace traditional lamps mainly due to their high efficiency and compact design. Broadband NIR phosphors activated by Cr³⁺ and Cr⁴⁺ have attracted significant research interest, offering emission across a wide range from 700 to 1700 nm. In this work, we synthesized a series of Sc_2(1–x)Ga_2xO₃:Cr^3+/4+ materials (x = 0–0.2) with broadband NIR-I (Cr³⁺) and NIR-II (Cr⁴⁺) emission. We observed a substantial increase in the intensity of Cr³⁺ (approximately 77 times) by incorporating Ga³⁺ ions. Additionally, our investigation revealed that energy transfer occurred between Cr³⁺ and Cr⁴⁺ ions. Configuration diagrams are presented to elucidate the behavior of Cr³⁺ and Cr⁴⁺ ions within the Sc₂O₃ matrix. We also observed a phase transition at a pressure of 20.2 GPa, resulting in a new unknown phase where Cr³⁺ luminescence exhibited a high-symmetry environment. Notably, this study presents the pressure-induced shift of NIR Cr⁴⁺ luminescence in Sc_2(1–x)Ga_2xO₃:Cr^3+/4+. The linear shifts were estimated at 83 ± 3 and 61 ± 6 cm^–1/GPa before and after the phase transition. Overall, our findings shed light on the synthesis, luminescent properties, temperature, and high-pressure behavior within the Sc_2(1–x)Ga_2xO₃:Cr^3+/4+ materials. This research contributes to the understanding and potential applications of these materials in the development of efficient NIR light sources and other optical devices.

In that dataset, the raw data of excitation and emission spectra, temperature-dependent, and high-pressure dependent photoluminescence and decay profiles are provided

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Oprogramowanie:: OriginLab, HPD-TA

Informacje szczegółowe

Rok publikacji:

2023

Data zatwierdzenia:

2023-12-21

Język danych badawczych:

angielski

Dyscypliny:

nauki fizyczne (Dziedzina nauk ścisłych i przyrodniczych)

DOI:

10.34808/8z59-k844

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