Spectroscopic investigations of Dy3+‐doped tungstate–tellurite glasses for solid‐state lighting applications

摘要: A series of Dy3+‐activated lithium–tungstate–tellurite (LTT) glasses have been synthesized employing a conventional melt quenching procedure. The structural and luminescent features of LTT glasses were examined in detail to reveal their feasibility in solid‐state lighting (SSL) applications. Various physical parameters such as density, molar volume, and other parameters were evaluated. A broad hump showed in the X‐ray diffraction profile affirms the non‐crystalline or amorphous behavior of the as‐prepared LTT glasses. The absorption spectrum exhibits several bands between the 400 and 1800 nm range, which confirms that the transitions initiate from the lowest energy state (6H15/2) to numerous excited states. Photoluminescence (PL) spectra reveal three significant peaks centered at 481 (blue), 575 (yellow), and 664 nm (red) related to Dy3+ ions under 388 nm excitation. The chromaticity coordinates of LTT …