Abstract
The fabrication of multilayer polymeric devices has been plagued by serious inter mixing at the interface. There is little progress in the fabrication of polymeric multilayer devices besides chemical synthesis of materials different solubility. A solution-buffer technology was invented in our laboratory previously and multilayer PLEDs with improved, uniformity and longer lifetime was demonstrated. This solution-buffer technology provides a feasible way to fabricate multilayer polymeric devices and enables many useful designs. Extend our previously work on solution-buffer technology in the design. Fabrication of high-brightness PLEDs and designed multilayer PLEDs were obtained. Devices fabricated through the solution-buffer technology were successfully demonstrated. For blue PLED a luminance of 32000cd/m2 and a efficiency of 7cd/A was achieved breaking previously world record. With the blue PLED, white light close to (0.33,0.33) in CIE coordinate was generated with proper doping little yellow-green light and red light. All these prove that our solution-buffer technology in overcoming the fabrication of high performance PLED are very important.