Energy transfer and luminescent properties in Tb³⁺ and Eu³⁺ co-doped CaMoO₄/SrMoO₄ thin films

Abstract

A series of Eu 3+ and Tb 3+ co-doped CaMoO 4 /SrMoO 4 luminescent thin films were prepared by a facile solution method, and they were annealed at 550°C for 2 h. The luminescent properties of the thin films were studied, which involve the energy transfer from Tb 3+ to Eu 3+ . The emission color can be changed from green to red, with increasing Eu 3+ doping concentration in Tb 3+ -doped CaMoO 4 /SrMoO 4 thin films. In addition, it was observed that the PL intensity of Eu 3+ will enhance when Tb 3+ ions are incorporated into Eu 3+ -doped CaMoO 4 /SrMoO 4 thin films. The optical band gaps of the luminescent thin films are found to be in the range of 4.49 to 4.72 eV. These results revealed that Eu 3+ and Tb 3+ co-doped CaMoO 4 /SrMoO 4 luminescent thin films have a significantly potential application in electroluminescent devices.

CdSe-Decorated Flowerlike CaMoO4 Microspheres with Enhanced Hydrogen Production Activity

“…Among them, CaMoO 4 as a luminescent material has been widely applied in many fields. But due to the wide band gap, − CaMoO 4 could not absorb more visible light. Therefore, utilizing doping, surface modification, or heterostructure construction to modify CaMoO 4 would be an effective approach to increase its photocatalytic activity. − For example, Santiago’s group fabricated CaMoO 4 / g -C 3 N 4 composites via sonochemistry synthesis, and the photocatalytic activity was improved significantly due to facile photoinduced electron transfer .…”

The role of the Tm3+ concentration on CaMoO4 properties processed by microwave hydrothermal under stirring condition

“…[19][20][21][22] Several contributions about the properties of CaMoO 4 doped with rare-earth ions are published in the literature. [23][24][25][26][27][28] In particular, the thulium (Tm 3+ )based compounds have potential applications in several technological fields such as telecommunications, medicine, atmospheric sensing, Doppler radar for wind sensor, and near infrared (NIR) phosphors and lasers. There are reports in the literature that Tm 3+ ions exhibit bands emission in the VIS-NIR range.…”

“…In some cases, it also emits in the orange spectral range 19‐22 . Several contributions about the properties of CaMoO 4 doped with rare‐earth ions are published in the literature 23‐28 . In particular, the thulium (Tm 3+ )‐based compounds have potential applications in several technological fields such as telecommunications, medicine, atmospheric sensing, Doppler radar for wind sensor, and near infrared (NIR) phosphors and lasers.…”