Rietveld Refinement, Morphology, and Optical and Photoluminescence Properties of a β-Ag 1.94 Cu 0.06 MoO 4 Solid Solution

• Published in: Inorganic chemistry Vol. 61; no. 3; pp. 1530 - 1537
• Main Authors: da Silva Sousa, Giancarlo, Xavier Nobre, Francisco, Valério Botelho do Nascimento, Marcus, da Cunha Mendes, Otoniel, Manzato, Lizandro, Leyet Ruiz, Yurimiler, Brito, Walter Ricardo, Rogério da Costa Couceiro, Paulo, Elias de Matos, José Milton
• Format: Journal Article
• Language: English
• Published: United States 24.01.2022
• ISSN: 0020-1669; 1520-510X
• DOI: 10.1021/acs.inorgchem.1c03245

Corner-truncated cubic β-Ag Cu MoO microcrystals were synthesized using the hydrothermal method. These were investigated by X-ray diffraction, confirming obtention of the spinel structure 3̅ . Through Raman spectroscopy are confirmed all modes for the point group of . The shows a decrease of the band gap from 3.20 to 3.07 eV, with reduction of the conduction band occurring from -0.20 eV (β-Ag MoO ) to -0.13 eV (β-Ag Cu MoO ), suggesting a p-type behavior for the Cu ion. The field-emission scanning electron microscopy images confirm the morphological changes for β-Ag MoO , where potato-like microcrystals were found. Meanwhile, corner-truncated cubic microcrystals for β-Ag Cu MoO . The photoluminescence (PL) spectrum confirms the increase in the PL emission for β-Ag Cu MoO , with suppression of the deep defects occurring in the structure caused by oxygen and silver atoms. In contrast, the green region is intensified because of distortions of the Ag-O and Mo-O bonds. Therefore, the β-Ag Cu MoO solid solution has PL emission with CCT (4510 K) and CIE coordinates ( = 0.372 and = 0.433), which could be interesting properties for applications as light-emitting diodes.