Growth of Er3+/Yb3+ Co-doped CaMoO4 Thin Film by a Spray Coating and Its Upconverting Luminescence
Polycrystalline Er3+/Yb3+ co-doped CaMoO4 (CaMoO4:Er3+/Yb3+) film was successfully fabricated by a spray coating method. Crystal structure, surface morphology and upconversion (UC) luminescent properties were investigated.
Under 980-nm excitation, CaMoO4:Er3+/Yb3+ film exhibited strong green UC emissions at 530 and 550 nm (2H11/2, 4S3/2→4I15/2) visible to the naked eye with a weak red emission near 660 nm
(4F9/2→4I15/2) corresponding to the intra 4f transitions of Er3+. A possible UC mechanism related to the pump-power dependence is discussed in detail.
Document Type: Research Article
Publication date: 01 October 2014
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