科研之友
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摘要
Ca3Al2Ge2O10:Cr3+ phosphors were prepared by a high-temperature solid-state method, and their luminescence properties were investigated. Under excitation at 550 nm, Ca3Al2Ge2O10:Cr3+ phosphors exhibited a broad red emission band at 697 nm in the range 650-750 nm that was caused by the (2)E(4)A(2) transition of Cr3+. For the 697 nm emission peak, emission intensity reached a maximum at x = 0.07, and there was concentration quenching of Cr3+ in Ca3Al2Ge2O10; the corresponding concentration quenching mechanism was analysed. Under excitation at 262 nm, the Ca3Al2Ge2O10:Cr3+ phosphor showed a weakly broad emission band in the range 350-600 nm that was caused by intrinsic defects (V-Ca and V-O).
- 出版日期2016-9
- 单位河北大学
