摘要
A stable red organic light-emitting device has been realized by doping a red dye tetra-methyljuloidine (DCJT)in electron transporting layer(ETL). The structure of the device was ITO/ CuPc/ NPB/ Alq: DCJT/ MgAg, where copper phthalocyanine(CuPc) was used as a buffer layer, N, N ’-his-(1-napthyl)-N, N’- diphenyl-1, 1’ -biphenyl-4, 4’ -diamine(NPB) as the hole transporting layer, tris(8-quinolinolato) aluminum complex(Alq) as ETL, in which DCJT was doped, indium tin oxide(ITO) and MgAg were as the anode and cathode, respectively. The red emission with peak at 620nm and CIE coordinates x = 0. 63, y = 0. 37, maximum luminance 4 687cd/m2, maximum luminous efficency 0. 83lm/W were obtained. The device showed a high stability under 12mA/cm2 current density continuous operation, the half decay time reached 2 500 hours at the initial luminance 150cd/m2 and the change of driving voltage was 0. 6mV/hour in the degradation process. If 50cd/m2 is taken as the initial luminance of red device, the half decay time is considered to be 7 500 hours. (According to European Broadcasting Union(EBU) standard, for color display the ratios for red, green, blue luminance should be 30 %, 59 % and 11 %, respectively, since 100cd/m2 is often used as initial luminance of green emission in degradation test, 50cd/m2 should be adapted as the initial luminance for red emission. )
A stable red organic light-emitting device has been realized by doping a red dye tetra-methyljuloidine (DCJT)in electron transporting layer(ETL). The structure of the device was ITO/ CuPc/ NPB/ Alq: DCJT/ MgAg, where copper phthalocyanine(CuPc) was used as a buffer layer, N, N '-his-(1-napthyl)-N, N'- diphenyl-1, 1' -biphenyl-4, 4' -diamine(NPB) as the hole transporting layer, tris(8-quinolinolato) aluminum complex(Alq) as ETL, in which DCJT was doped, indium tin oxide(ITO) and MgAg were as the anode and cathode, respectively. The red emission with peak at 620nm and CIE coordinates x = 0. 63, y = 0. 37, maximum luminance 4 687cd/m2, maximum luminous efficency 0. 83lm/W were obtained. The device showed a high stability under 12mA/cm2 current density continuous operation, the half decay time reached 2 500 hours at the initial luminance 150cd/m2 and the change of driving voltage was 0. 6mV/hour in the degradation process. If 50cd/m2 is taken as the initial luminance of red device, the half decay time is considered to be 7 500 hours. (According to European Broadcasting Union(EBU) standard, for color display the ratios for red, green, blue luminance should be 30 %, 59 % and 11 %, respectively, since 100cd/m2 is often used as initial luminance of green emission in degradation test, 50cd/m2 should be adapted as the initial luminance for red emission. )
出处
《发光学报》
EI
CAS
CSCD
北大核心
2000年第2期174-176,共3页
Chinese Journal of Luminescence
基金
国家自然科学基金重大项目!(59790050)
上海市教委资助项目
关键词
红色发光
有机薄膜电致发光器件
平板显示器
high stability
red light emitting
organic thin film electroluminescence
