Color Tunable High Efficiency Microcavity Organic Light-emitting Diodes
Color tunable microcavity organic light-emitting diodes (OLEDs) with structure of distributed Bragg reflectors (DBR)/ indium-tin-oxide (ITO)/ N, N-di(naphthalene-l-yl)-N, N-diphenyl-benzidine (NPB)/ tris(8-hydroxyquinoline) aluminum (Alq3 )/LiF/Al were fabricated. Orange red and green light emissions with full width at half maximum (FWHM) of less than 20 nm were obtained through simply changing the thickness of NPB layer. Furthermore, due to the effective modification of the spontaneous emission within microcavity, the brightness and electroluminescent (EL) efficiency of the microcavity OLEDs were significantly enhanced. The maximum brightness and current efficiency, respectively, reached 31 000 cd/m2 at a current density of 480.0 mA/cm2 and 8. 3 cd/A at a current density of 110.0 mA/cm2 for green devices , and 9 700 cd/m2 at a current density of 180.0 mA/cm2 and 6,6 cd/A at a current density of 36.4 mA/cm2 for red devices, which are over 1.5 times higher than those of noncavity OLEDs.
Microcavity Organic Light-emitting Diodes Color Tunable
Hongmei Zhang Han You Dongge Ma
State Key Laboratory of polymer Physics and Chemistry,Changchun Institute of Applied Chemistry, Chin State Key Laboratory of polymer Physics and Chemistry,Changchun Institute of Applied Chemistry, Chin
国际会议
上海
英文
1473-1477
2007-03-12（万方平台首次上网日期，不代表论文的发表时间）