Development of Inorganic Electroluminescent Displays at SVA
Improved dielectric and phosphor materials and device structures for thin film electroluminescent (TFEL) displays are reported. With a combination of A12O3, Ta2O5, SrTiO3, BaxSr1-xTiO3, ZrO2 and HfO2 thin films etc. , prepared by RF or pulsed-DC reactive magnetron sputtering, or by electron beam evaporation, high performance composite thin film dielectrics with a figure of merit greater than 10 μC/cm2 have been successfully developed and used as lower and upper dielectrics in ZnS: Mn and Zn2SixGe1-xO4 : Mn based TFEL devices. High luminance at 50 V above the threshold (L50) has been achieved for the ZnS: Mn based TFEL devices with L50 =882 cd/m2 at Vtb =170 V, when driven by 200 Hz AC voltage. 2-inch diagonal monochrome TFEL displays (128×64 pixels) based on the novel dielectric stacks have been successfully developed which are capable of displaying scrolling messages. L50 has reached 488 cd/m2 for the 2-inch diagonal (128×64 pixels) monochrome TFEL displays when driven by 200 Hz AC voltage. Finally, efforts towards the development of full-color TFEL displays are discussed, including the development of BaAl2S4: Eu based blue-emitting TFEL phosphor and the color change materials (CCM).
Thin Film Electroluminescent Display TFEL Full-color Composite Thin Finn Dielectrics Oxide EL Phosphor
Tian Xiao
Flat Panel Display Tech. R&D Center, SVA Electron Co., Ltd. ,196 Ouyang Rd. , Shanghai 200081, China
国际会议
上海
英文
488-493
2007-03-12（万方平台首次上网日期，不代表论文的发表时间）