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固态阴极射线发光亮度的提高


□ 张福俊 徐 征

  摘 要为提高固态阴极射线发光亮度,以碰撞激发为核心,采取了两个方面的措施:第一是增大初电子的密度及过热电子的能量;第二是采用固态阴极射线发光和有机电致发光的混合或级联激发.固态阴极射线发光中的初电子来源包括从电极隧穿的电子和从界面态及材料陷阱中获释的电子.这些电子在电场的作用下在固体薄膜中加速获得能量,成为过热电子.它们碰撞激发有机材料发光后,本身并没有湮灭,而和传导电子及倍增电子一道与注入的空穴复合,产生发光.
  关键词固态阴极射线发光,过热电子
  
  Improvement of solid state cathodoluminescence intensity
   ZHANG Fu-JunXU Zheng
  (Key Laboratory of Luminescence and Optical Information, Ministry of Education, Institute of Optoelectronics Technology, Beijing Jiaotong University, Beijing 100044,China)
  AbstractTwo effective approaches have been implemented to improve solid state cathodoluminescence (SSCL) intensity based on impact excitation. The first is to enhance the injected electron density and the energy of hot electrons. The second is to use mixed excitation, to produce a combination of SSCL and organic electroluminescence. In SSCL the electron source includes injected electrons from the cathode, as well as electrons freed from interfacial states and those trapped in the material. These electrons are accelerated in the solid thin films and become hot electrons, which can directly excite the organic material and then recombine with injected holes in the same manner as conducting electrons and multiplied electrons.  ......
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