Blue / White Organic light Emitting Diodes and Passive Matrix Display

摘要

The blue organic light emitting diodes (OLED) based on anthracene derivatives( ADN) doped with distyrylarylene derivatives (BCzVB and DSA-ph) were presented. The device of ADN doped with BCzVb shows high color purity (x=0.146,y=0.162) with maximum luminance 11600cd/m~2(15V), current efficiency 2.8cd/A, while the device of ADN doped with DSA-ph exhibits a sky blue with as high as efficiency 8.29cd/A, both have a flat efficiency vs current density responses. A typical blue device of ADN doped with TBPe is used for comparison , which gives greenish blue and a stronger current-induced fluorescence quenching. Three kinds of White organic light emitting devices (WOLED) with different dopants and doping sites were constructed. The cell with a single-doped red dye in the light emitting layer(EML)(single -doped) and the cell with both red and blue dyes doped in a single EML(double-doped)as well as the cell with red and blue dyes doped in EML and a green dye in another layer(triple-doped ). The triple-doped cell shows much higher performance than other two cells: maximum luminance 21200cd/m~2, 1026cd/m~2 at driving current 20mA/cm~2, efficiency 6cd/A and a half lifetime over 22245h were reached. A passive display features 102x 64 pixels with pixel size of 0.25x0.25mm~2 pixel pitch 0.08mm, luminance 100 cd/m~2 at driving duty 1/64,and power consumption of 0.6W was constructed.