摘要
以Tb3+ :水杨酸 (Tb3+ :(SA) 3)为空穴传输层兼发光层、高荧光材料Alq3为电子传输层 ,得到了窄谱带的绿色有机薄膜电致发光双层结构器件 .实验证实 ,双层器件的电致发光是电荷载流子隧穿内界面 (Tb3+ :(SA) 3 Alq3)之后分别在两有机层内的复合发光 ,是两有机层本征发光的叠加 .其光谱随着电子传输层厚度而改变 ,因而减少电子传输层厚度能得到亮度高、稳定性好的窄谱带电致发光器件 ,为获得高色纯度和稳定的电致发光器件提供了思路和方法 .
Pure green and narrow bandwidth emission from organic bilayer electroluminescent devices were presented by using Tb3+ : (SA)(3) as hole-transporting layer and emissive layer, and high fluorescent material Alq(3) acting as electron-transporting layer. It proves that the emission comes from carriers' recombination after their tunneling through the inner interface (Tb3+ :(SA)(3)/Alq(3)) in the bilayer ITO/Tb3+ :(SA)(3)(40nm)/Alq(3) (55 nm)/Al diode. The spectrum of the bilayer devices varies with the thickness of the electron-transporting layer. Keeping the thickness of Tb3+ :(SA)(3) layer constant, there is no emission from Alg layer when Ale layer reduces to 12 nm; meanwhile, pure green and narrow bandwidth emission can be observed. Thus, it provides a simple way to obtain high luminance and long-term stability by reducing electron- or hole-transporting layer, especially, by using a lanthanide complex for emissive layer.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2001年第5期973-976,共4页
Acta Physica Sinica
基金
国家自然科学基金 (批准号 :2 9992 5 3 0
199740 0 2 )
北方交通大学攀登计划 (论文 )基金资助的课题&&
