Multicolor Electroluminescent ZnS Thin Films Doped with Rare Earth Fluorides
Multicolor Electroluminescent ZnS Thin Films Doped with Rare Earth Fluorides
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掺杂稀土氟化物的多色电致发光 ZnS 薄膜
DOI：
10.1002/pssa.2210880239
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发表时间：
1985
期刊：
影响因子：
--
通讯作者：
H. Sasakura
中科院分区：
文献类型：
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作者：
H. Kobayashi;Shosaku Tanaka;V. Shanker;M. Shiiki;T. Kunou;J. Mita;H. Sasakura
本文系统地研究了掺杂稀土中心SmF_3（红色）、TbF_3（绿色）和TmF_3（蓝色）的ZnS薄膜电致发光器件的多色性。各种特性，如亮度，发光效率，衰减时间，EL光谱，和它们的浓度依赖性进行了测量。还估计了从这些器件发射的光子的数量以讨论量子效率。对于SmF_3和TmF_3激活剂，发现浓度猝灭是通过非辐射交叉弛豫过程发生的。对于TbF3活化剂没有观察到这样的淬灭。在TmF3活化剂中，发现大部分辐射能量在红外区域中发射。这些稀土化合物的碰撞激发截面也被推断为低于Mn 2+离子。
A systematic investigation of the electroluminescent (EL) ZnS thin film devices doped with rare earth centers, SmF3 (red), TbF3 (green), and TmF3 (blue), is made to examine the possibility of multicoloring. Various characteristics, such as brightness, emission efficiency, decay time, EL spectra, and their concentration dependences are measured. The number of photons emitted from these devices is also estimated to discuss quantum efficiencies. For SmF3 and TmF3 activators, it is found that concentration quenching of EL emission takes place through non-radiative crossrelaxation process. No such quenching is observed for TbF3 activators. In TmF3 activators, most of the radiative energy is found to be emitted in the infrared region. The impact excitation cross-section for these rare earth compounds is also inferred to be lower compared with that of Mn2+ ions.