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ZnS:Cu型交流电致发光亮度随使用时间增加而下降,这是人们早就知道的老化现象,人们为维持亮度作了很多努力,研究了与老化有关的各种现象,提出了几种老化机理模型.60年代,Lehmann提出硫空位造成材料老化的观点,但他后来又否定了自己的观点.80年代,Hirabayashi等人较系统地研究了交流电致发光材料的老化,提出了引起老化的主要因素是材料的粒度、晶体的质量、掺杂的浓度、硫空位的浓度和铜离子的电迁移等.我们在180℃的低温下把表面镀上的铜扩散进ZnS单晶中,去掉表面的铜后,通过加直流电
ZnS: Cu-type AC electroluminescence brightness decreases with increasing use of time, which is a long-known phenomenon of aging, people have done a lot of efforts to maintain the brightness, aging-related phenomena studied and proposed several aging mechanisms Model.In 1960s, Lehmann proposed the view that sulfur vacancy caused the material to age, but later he denied his opinion.In the eighties, Hirabayashi et al studied systematically the aging of AC electroluminescent material and proposed the main factors causing aging Is the particle size of the material, the quality of the crystal, the concentration of doping, the concentration of sulfur vacancies and the electromigration of copper ions, etc. We diffuse the copper plated on the surface into the ZnS single crystal at a low temperature of 180 ° C to remove the copper After, by adding DC