Low-voltage cathodoluminescence property of Li-doped Gd2−xYxO3:Eu3+
Low-voltage cathodoluminescence property of Li-doped Gd2−xYxO3:Eu3+
复制标题
Li掺杂Gd2−xYxO3:Eu3+的低压阴极发光特性
DOI：
10.1016/s0022-2313(03)00018-8
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发表时间：
2003
影响因子：
3.6
通讯作者：
S. Byeon
中科院分区：
文献类型：
--
作者：
Mi;Jung;Dong;S. Byeon
研究了低电压（300 V-1 kV）下Li掺杂的Gd 2 − xYxO 3：Eu 3+固溶体（0.0 μ m × 0.8 μ m）的阴极发光（CL）谱。化学发光强度在x=0.2时最大，随着Y取代量的增加而逐渐减小。特别地，通过仅在650°C下烧制柠檬酸盐前体18小时，获得Li掺杂的Gd 1.8Y 0.2O3：Eu 3+的小颗粒（约100 nm）。在300 V电压下，该荧光粉的相对红光发射强度是市售红色荧光粉Y_2O_3：Eu ~（3+）的180%。焙烧温度增加至900°C导致400- 600 nm尺寸的球形颗粒。在低电压（300- 800 V）下，100 nm粒径颗粒的化学发光强度远大于400- 600 nm粒径颗粒的化学发光强度。相比之下，较大的颗粒在高电压（1- 10 kV）下表现出较高的CL发射强度。考虑到小的球形形貌和有效的CL发射，Li掺杂的Gd1.8Y0.2O3：Eu 3+似乎是一种有效的低电压场发射显示器的荧光粉材料。
Cathodoluminescent (CL) spectra of Li-doped Gd2−xYxO3:Eu3+solid-solution (0.0⩽x⩽0.8) were investigated at low voltages (300V–1kV). The CL intensity is maximum for the composition of x=0.2 and gradually reduces with increasing the amount of substituted Y content. In particular, small (∼100nm) particles of Li-doped Gd1.8Y0.2O3:Eu3+are obtained by firing the citrate precursors at only 650°C for 18h. Relative red-emission intensity at 300V of this phosphor is close to 180% in comparison with that of commercial red phosphor Y2O3:Eu3+. An increase of firing temperature to 900°C results in 400–600nm sized spherical particles. At low voltages (300–800V), the CL emission of 100nm sized particles is much stronger than that of 400–600nm sized ones. In contrast, the larger particles exhibit the higher CL emission intensity at high voltages (1–10kV). Taking into consideration small spherical morphology and effective CL emission, Li-doped Gd1.8Y0.2O3:Eu3+appears to be an efficient phosphor material for low voltage field emission display.