摘要
以磷光染料Ir(piq)2(acac)作为发光掺杂剂,掺入空穴传输性主体材料NPB中得到红色发光层,荧光材料TBP掺入到主体CBP中作为蓝色发光层,制备了结构为ITO/NPB/NPB:Ir(piq)2(acac)/CBP/CBP:TBPe/BCP/ALq/Mg:Ag的双发光层白色有机电致发光器件.其中ALq3、未掺杂的NPB和CBP及BCP层分别作为电子传输层、空穴传输层和激子阻挡层.实验中通过调节发光层厚度及Ir(piq)2(acac),TBPe的掺杂浓度,可以得到性能良好的白光器件.15V时器件色坐标为(0.330.30),启亮电压4.8V,器件最大外量子效率和亮度分别为1.24%和7500cd/m2.
A double-layer white organic electroluminescent device was fabricated by using hole transporting material NPB doped with phosphoresecent dye Ir（piq）2 （acac） as red emitting layer and CBP doped with fluorescent dye TBPe as blue emitting layer. The configuration of this device was ITO/NPB/NPB： Ir（piq）2 （acac）/CBP/CBP： TBPe/BCP/Alqs/Mg： Ag/Ag in which Alq3, NPB （undoped）, CBP（undoped） and BCP films functioned as electron transporting layer, hole transporting layer and exciton blocking layer, respectively. White emission was be successfully achieved from the device with good EL performance by adjusting the thicknessess of light-emitting layers and the proportion of the dopants （TBPe, Ir（piq）2 （acac））. With a low turn-on voltage of 4.8 V, it shows a maximum luminance of 7500 cd/m^2 and external quantum efficiency of 1.24 % at the driving voltage of 9 V. Pure white light with Commission Internationale de 1＇ Eclairage （CIE） coordinates of（0.33 0.30）was obtained at an applied voltage of 15 V.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2008年第3期1913-1917,共5页
Acta Physica Sinica
基金
国家自然科学基金(批准号:60576038)
中英国际合作项目(国家自然科学基金委与英国皇家学会联合资助)
天津市“材料物理与化学”重点学科和天津市科委重点项目(批准号:06TXTJJC14603)资助的课题~~
