作为携带、沉积纳米荧光粉颗粒和纳米铁电体颗粒到FEDs和EL器件上的载体的可印刷的油墨、粘结剂

文章介绍了两种移植和可控纳米沉积荧光粉颗粒和纳米铁电体颗粒的载体.第一种载体是一种可以悬浮和沉积合成的具有亚微米级尺寸大小的荧光粉颗粒的油墨.解决了该油墨的聚集和沉降问题,并发现该油墨具有良好的液流学性能,从而可用于印刷高分辨率的荧光粉.测量了相关的单个象素的阴极发光密度以评定这种丝网印刷油墨的可重复性.第二种载体是一种粘结剂,这种粘结剂不仅可以携带 30 μm 以及更大的尺寸的电致发光的荧光粉,还可以携带纳米铁电体颗粒.这种新型的粘结剂可应用于不需要额外的绝缘反射层的低造价的 EL 显示器.从衬底按要求将发射层剥下来就形成了柔性薄膜,将该薄膜置于两电极之间,仍可保持其电致发光的活性.该粘结剂薄膜可以很容易地印刷和定型制成显示屏.

Printable Inks and Binders as Vehicles for Carrying/Depositing Phosphor Nanometer Particles and Ferroelectric Nanometer Particles on Screens for FEDs and EL Devices

Two different vehicles have been designed for carrying and controllably depositing phosphor nanometer and ferroelectric nanometer particles. The first vehicle was an ink that could suspend and de-posit phosphor particles that had been synthesized to have sub-micrometer primary particle sizes and nar-row size distribution. Aggregation and settlement problems in the inks were addressed and the rheological properties of the inks were adjusted to facilitate the printing of phosphors in high resolution pixels. The relative cathodoluminescent intensities across a single pixel, containing the red emitting cubic-Y2O3 : Eu3+phosphor powder, were compared to assess the repeatability of the screen-printing of the inks. The second is a binder vehicle which not only carries the electroluminescent phosphor particles that can be up to 30 μm or more in size, but also carries the ferroelectric nanometer particles. This novel binder for AC powder dis-plays was used to form low cost EL displays which require no additional dielectric reflector layers. The em- issive layer can be peeled from the substrate as a flexible film which remains EL active when placed be-tween two electrodes. The binder film can be easily screen printed and shaped as desired.