Generalized wet-chemical processing of phosphor monospheres and the effects of composition on photoluminescence
Generalized wet-chemical processing of phosphor monospheres and the effects of composition on photoluminescence
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荧光粉单球的广义湿化学处理及其成分对光致发光的影响
DOI：
10.1088/1757-899x/18/4/042002
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发表时间：
2011
期刊：
影响因子：
--
通讯作者：
石垣隆正
中科院分区：
文献类型：
--
作者：
李継光;Zhu Qi;Li Xiaodong;Sun Xudong;石垣隆正
通过基于尿素的均匀沉淀技术成功合成了各种镧系元素组合的碱式碳酸盐单球，然后将其转化为分散良好的荧光粉颗粒，发出不同的颜色。对于这些混合阳离子系统，通常观察到连续沉淀，需要对碱性碳酸盐前体进行充分退火，以实现最终氧化物颗粒中的阳离子均匀化，从而通过消除发光的局部浓度猝灭来获得更好的发光。结果表明，由于其优异的分散性和均匀的尺寸，荧光粉球很容易组装成紧密堆积的发光薄膜，使其在白光LED、等离子显示面板（PDP）和场发射显示器（FED）中得到广泛应用。
Basic carbonate monospheres of various lanthanide combinations are successfully synthesized by the urea-based homogeneous precipitation technique, which are then converted into well dispersed phosphor particles that emit diverse colours. Sequential precipitation is commonly observed for these mixed cation systems, calling for adequate annealing of the basic carbonate precursors to attain cation homogenization in the final oxide particles and thus better luminescence, through eliminating localized concentration quenching of luminescence. It is shown that, owing to their excellent dispersion and uniform size, the phosphor spheres are readily assembled into close-packed luminescent films, allowing their wide applications in white LEDs, plasma display panels (PDPs), and field emission displays (FEDs).