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Optical and electrical properties of 1%Er3+ and different Yb3+ content (1ExY) codoped Ba0.8Sr0.2TiO3 (BST) ferroelectric ceramics fabricated by the solid‐phase reaction were investigated. Under 980 nm pump condition, two green emission bands at 525 and 549 nm wavelength corresponding to, 2H11/2→4I15/2 and 2S3/2→4I15/2 transitions, and two red emission bands at 655 and 668 nm wavelength attributed...
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