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red phosphor
    One of the proplems for FED phosphors is that red phosphors have high threshold voltage and low luminescent efficiency. In this paper a new red phosphor (Gd 2-m Zn m)O 3:Eu 3+ with low threshold is reported.
    低压FED 荧光粉现在存在着一个比较大的问题就是红色荧光粉的阈值电压高, 发光效率低-本文对一种新型红色低压荧光粉(Gd2 - mZn m)O3 :Eu3 + 的低阈值电压特性进行了讨论
    The oxalic acid precipitation method was developed to synthesize non-grinded and small-size red phosphor in our experiment. Firstly, the mixture of Y_2O_3 and Eu_2O_3 was dissolved in nitric acid in certain proportion. Secondly, the prepared oxalic acid solution was placed in a reactor and at the same time a little surfactant was added in it.
    对草酸作为沉淀剂制备的细颗粒红色荧光粉Y2 O3 ∶Eu3 + 进行结构和发光特性研究 ,结果表明 :其一次粒径为 2 0~ 30nm ,团聚尺寸D50 =0 .5 3μm。
    Adding red phosphor into yellow phosphor,the emergence of red light in the emission spectra of these devices results in T_c reduces,and R_a increases. However,because the light-conversion efficiency of red phosphor is very low at present,the luminous efficiency of these white LEDs is dissatisfactory.
    在黄色荧光粉中添加红色荧光粉,由于光谱中红色成分的增加,可降低器件的色温,并提高器件的显色性,但由于目前红色荧光粉的转换效率较低,致使器件的整体发光效率不高;
 

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