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首页> 外文期刊>RSC Advances >Blue to magenta tunable luminescence from LaGaO3: Bi3+, Cr3+ doped phosphors for field emission display applications
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Blue to magenta tunable luminescence from LaGaO3: Bi3+, Cr3+ doped phosphors for field emission display applications

机译：LaGaO 3 的蓝到品红色可调发光：Bi 3 + ，Cr 3 + 掺杂的荧光粉，用于场发射显示应用

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A series of blue to magenta emitting color-tunable LaGaO3: Bi3+/Cr3+ phosphors were prepared by chemical routes, and their phase structure, morphology and photoluminescence (PL) properties were investigated in detail. Luminescence studies indicated that the optimum concentrations of Bi3+ and Cr3+ in LaGaO3 were found to be 1 at% and 3 at%. Co-doping with Bi3+ ions resulted in increased Cr3+ emission intensity and gradual reduction in Bi3+ emission intensity, confirming the presence of a Bi3+–Cr3+ energy transfer. The energy transfer (ET) mechanism from the host lattice to the Bi3+ and Cr3+ ions in the LaGaO3: Bi3+/Cr3+ phosphor has been explained. The ET efficiency has been calculated and found to be 55%. The critical ET distance has been calculated by the concentration-quenching method. The enhanced intensity and tuned luminous color of LaGaO3: Bi3+/Cr3+ phosphors provided a promising material for field emission display devices.
机译：一系列从蓝色到品红色的可调色LaGaO 3 ：Bi 3 + / Cr <通过化学途径制备了sup> 3 + 荧光粉，并对其相结构，形貌和光致发光特性进行了详细研究。发光研究表明，LaGaO 3 + 和Cr 3 + 的最佳浓度> 3 被发现为1 at％和3 at％。与Bi 3 + 离子共掺杂会导致Cr 3 + 发射强度增加，Bi < small> 3 + 发射强度，确认存在Bi 3 + –Cr 3+ 能量转移。从主晶格到Bi 3 + 和Cr 3 + 离子的能量转移（ET）机制LaGaO 3 ：Bi 3 + / Cr 3 + <已经解释了磷光体。已经计算出ET效率，为55％。临界ET距离已通过浓度猝灭法计算。 LaGaO 3 的增强强度和可调的发光颜色：Bi 3 + / Cr 3 + 荧光粉为场发射显示设备提供了有希望的材料。

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