高效率非掺杂型白色有机电致发光器件

High-efficient non-doped type white organic light-emitting devices

制备了基于rubrene超薄层和NPBX做激子阻挡层的高效率的非掺杂型白色有机电致发光器件。器件结构为:ITO/2T-NATA(20 nm)/NPBX(25-dnm)/rubrene(0.2 nm)/NPBX(d nm)/DPVBi(30 nm)/Alq(30 nm)/LiF(0.5 nm)/Al。器件的电致发光光谱依靠激子阻挡层NPBX厚度d的变化而变化,当NPBX厚度d为5 nm时,器件色坐标从7 V变化到16 V时均在白光的中心区域,有最大电流效率7.91 cd/A(V=7 V)和最大亮度13540 cd/m2(V=16 V)。

High-efficient non-doped type white organic light-emitting devices（WOLEDs） were fabricated using an ultra thin rubrene film and exciton blocker of NPBX. The devices have the following stmcture;ITO/2T-NATA （20 nm）/NPBX （25-d nm）/ rubrene（0. 2 nm） / NPBX （d nm）/DPVBi（30 nm）/ Alq（30 nm）/LiF（0.5 nm）/A1. The EL spectrum of the de vices were dependent on the d and d= 5 ,the CIE chromaticity coordinates of the devices were well within the white region for voltage raging from 7 V to 16 V,This devices has a maximum luminous efficiency of 7.91 cd/A at 7 V and maximum luminance of 13 540 cd/m^2 at 16 V.