Cathodoluminescence properties of blue-emitting SrGa2S4:Ce thin-films grown by low-temperature process
Cathodoluminescence properties of blue-emitting SrGa2S4:Ce thin-films grown by low-temperature process
复制标题
DOI：
10.1063/1.1487436
复制
发表时间：
2002-06
影响因子：
3.2
通讯作者：
Katsu Tanaka;S. Okamoto;H. Kominami;Y. Nakanishi;Xiaolong Du;A. Yoshikawa
中科院分区：
文献类型：
--
作者：
Katsu Tanaka;S. Okamoto;H. Kominami;Y. Nakanishi;Xiaolong Du;A. Yoshikawa
研究了Ce激活的硫代镓酸锶（SrGa_2S_4：Ce）薄膜在中低加速电压（<5 kV）激发下的阴极发光（CL）特性。SrGa 2S 4：Ce薄膜是用分子束外延系统多晶淀积生长的。CL磷光体薄膜的生长温度为472.5 °C，这是有史以来达到的最低值。几个相关的性能进行了观察，包括CL光谱，亮度，发光效率，和薄膜的表面形貌。在加速电压为5 kV、电流密度为60 μA/cm ~ 2时，获得了亮度为1000 cd/m ~ 2、效率为1 lm/W的发光器件。膜的光输出耦合效率（ηout）为0.0531。尽管与粉末磷光体相比膜的η小，但亮度和功效与常规ZnS：Ag，Cl粉末磷光体相当。薄膜的平均晶粒尺寸为0.14 μ m。
The cathodoluminescence (CL) properties of Ce-activated strontium thiogallate (SrGa2S4:Ce) thin films have been investigated aiming towards phosphor screen application in an emissive display under low to medium accelerating voltage (<5 kV) excitation. The SrGa2S4:Ce thin films were grown by multisource deposition using a molecular beam epitaxy system. The growth temperature of the CL phosphor thin films was 472.5 °C, which is the lowest value ever achieved. Several related properties were observed, including the CL spectra, luminance, luminous efficacy, and surface morphology of the thin films. A luminance of 1000 cd/m2 and an efficacy of 1 lm/W were obtained at an accelerating voltage of 5 kV with a current density of 60 μA/cm2. The light-outcoupling efficiency (ηout) of the film was 0.0531. In spite of this small ηout of the films compared to that of powder phosphors, the luminance and efficacy were comparable to the conventional ZnS:Ag, Cl powder phosphor. The average grain size of the films was 0.14 μ...