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Pulsed Laser Synthesis of Er3+/Yb3+ Co-Doped CaMoO4 Colloidal Nanocrystal and Its Upconversion Luminescence

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We report a novel synthetic route for Er3+/Yb3+ co-doped calcium molybdate (CaMoO4) nanoparticles by pulsed laser ablation in ethanol. The crystalline phase, particle morphology, laser ablation mechanism and upconversion (UC) luminescent properties are investigated. Stable colloidal suspensions consisting of well-dispersed Er3+/Yb3+ co-doped CaMoO4 nanoparticles could be obtained without any surfactant. Under 980 nm excitation, Er3+/Yb3+ co-doped nanocolloidal CaMoO4 suspension had a weak red emission near 670 nm and strong green UC emissions at 530 and 550 nm, corresponding to the intra 4f transitions of Er3+ (4F9/2, 2H11/2, 4S3/2) →Er3+ (4I15/2). The Er3+/Yb3+ co-doped nanocrystalline CaMoO4 suspension exhibited strong green emission visible to the naked eyes and a possible UC mechanism depending on the pump power dependence is discussed in detail.
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Keywords: Er3+/Yb3+ Co-Doped CaMoO4; Pulsed Laser Ablation; Upconversion

Document Type: Research Article

Affiliations: 1: Department of Advanced Materials Engineering, Chungbuk National University, Cheongju, Chungbuk 361-763, Korea 2: National Institute of Advanced Industrial Science and Technology, 1-1-1 Umezono, Tsukuba 305-8568, Japan 3: Department of Materials Science and Engineering, Korea National University of Transportation, Chungju, Chungbuk 380-702, Korea

Publication date: June 1, 2016

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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