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本文使用7英寸荫罩式等离子体显示器(SM-PDP)的实验小屏,在真空系统上动态地改变混合气体中Xe浓度和气体压强,测量了着火电压、发射光光强、电子温度、电流、亮度和效率等参数,并分析了混合气体对(SM-PDP)放电的影响。结果表明,提高Xe浓度和气体压强虽然带来了着火电压的升高,但是同时也使得电流下降,亮度和效率大幅提高。通过提高Xe浓度和气体压强,导致电子和中性粒子的碰撞截面变大:一方面电子的碰撞几率增加,使得放电中电子温度降低,增加了基态Xe原子到低能级的直接激发;另一方面中性粒子的碰撞几率增加,使得173 nm的真空紫外线辐射增强,从而改善总的气体放电效率。
In this paper, the experimental small screen of a 7-inch shadow mask plasma display (SM-PDP) was used to dynamically change the Xe concentration and the gas pressure in the mixed gas on the vacuum system. The effects of the firing voltage, the intensity of the emitted light, the electron temperature, the current , Brightness and efficiency parameters, and analyzed the impact of mixed gas on (SM-PDP) discharge. The results show that although the increase of Xe concentration and gas pressure bring about the increase of firing voltage, it also decreases the current and the brightness and the efficiency are greatly improved. By increasing the concentration of Xe and gas pressure, the collision cross-section between electrons and neutral particles increases. On the one hand, the collision probability of electrons increases and the electron temperature in discharge decreases, which increases the direct excitation of ground state Xe atoms to lower energy level. On the other hand The collision probability of neutral particles increases, making the vacuum ultraviolet radiation 173 nm enhanced, thereby improving the overall efficiency of gas discharge.