电子对介质阻挡放电平面光源光电特性的影响研究

Influence of Electron Emission on Characteristics of Dielectric Barrier Discharge Flat Lamp

为了研究介质阻挡放电平面光源(DBDL)中气体放电产生的电子对DBDL光电特性的影响,本文设计并制作了一种内部涂覆有阴极射线荧光粉的平面光源,该光源内部充入了20 kPa的纯氖气,在此条件下对该光源的光谱及放电图像进行了测量与比较。实验结果表明,在高气压下仍可观察到阴极射线荧光粉被电子激发的现象,且谱线的强度随着外加电压的升高而升高。在此基础上设计了一种采用光致荧光粉和阴极射线荧光粉相混合的DBDL,结果表明,在相同的输入功率下,对Ne-10%Xe混合气体而言,当气压为20 kPa,亮度低于2000 cd/m2时,混合荧光粉型结构可以提高DBDL的亮度及发光效率(最高21.2%)。

The effect of electrons,emitted by gas discharge,on the electro-optical characteristics of flat dielectric barrier discharge lamp（DBDL） was studied.the lamp was fabricated with a layer of cathodoluminescent（CL） phosphor and filled with Ne at a pressure of 20 kPa.The spectrum and the discharge image of DBDL with CL phosphor were meas ured and compared.The experiment results show that the excitation of CL phosphor,induced by the electrons,can be observed even at a pressure of 20 kPa,and the spectrum intensity increases with the applied voltage.A novel DBDL with CL and photo-luminscent layer inside was fabricated.The lamp was filled with Ne-10%Xe at 20 kPa,and it shows that the luminance and luminous efficacy of the proposd DBDL is up to 21.2% higher than those of the controlled sample when the input power is 1.8 W and the luminance is below 2000 cd/m2.