粉末DCEL发光区的随机性

粉末DCEL屏(夹心式)的发光区是在紧靠阳极的一个很薄(大约1μm)的区域内,这是至今所有研究者一致的结论。本文作者在实验中证实,粉末DCEL屏的发光区位置具有随机性,通常它可出现在任何难以预料的位置上,比如在靠近阴极或者在发光粉层中间以及靠近阳极,甚至同时在所有上述位置上出现,也有时发光区占据整个的发光粉层。实验还证实,发光区的位置与形成方式,电极材料,电压极性,发光材料和屏的结构等因素有关,发光区出现在紧靠阳极的区域只是一种特定条件下的结果。文章讨论了发光区形成的原因及其规律性,认为发光区的位置取决于发光粉层内电位分布不均匀性的具体情况。

THE RANDOMNESS OF LUMINESCENT REGION IN POWDERED DCEL PANEL

In this paper, the distribution and the origin of the luminescence region in DCEL panels (sandwich cells) have been investigated. The experiments are carried out by observing the cross-section of the panels in microscopy. It is found that the luminescence region in DCEL devices (sandwich cell) can be located anywhere, for example, at the region close to anode or cathode, or in the middle of phosphor/binder layer. It is suggested that the distribution of luminescence region of DCEL panels is random.The position of luminescence region depends mainly on the way of forming process and is also related to the structure defects in the phosphor/binder layer, the properties of phosphor and the electrode materials etc.