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中文摘要：
用有机荧光染料罗丹明B（Rhodamine B）作为掺杂剂，采用双量子阱结构制备了一种新型的黄光有机电致发光器件，器件结构及各层厚度为：ITO／CuPc（6nm）／NPB（20nm）／Alq3（3nm）／Alq3：Rhodamine B（3nm）／Alq3（3nm）／Alq3：Rhodamine B（3nm）／Alq3（30nm）／Liq（5nm）／Al（30nm）。研究发现Rhodamine B的掺杂浓度对该器件的发光亮度和发光效率有较大影响。当Rhodamine B的掺杂浓度为1．5wt％时，得到了最大电流效率1．526cd·A^-1，最大发光亮度1309cd·m^-2的黄光有机电致发光器件。由器件的电致光谱曲线，可以看到在发光层之间存在着Alq3向RhB传递能量的过程。由于量子阱的斯托克斯效应与RhB染料分子间的自极化作用，随着掺杂浓度的增加，λmax出现明显红移。
英文摘要：
The fabrication of a novel organic yellow-light-emitting device using Rhodamine B as dopant with double quantum-well （DQW） structure was introduced in the present article. The structure and thickness of this device is ITO/CuPc（6 nm）/NPB（20 nm）/Alq3 （3 nm）/Alq3 ： Rhodamine B（3 nm） /Alq3 （3 nm）/Alq3 ： Rhodamine B（3 nm）/Alq3 （30 nm）/Liq（5 nm）/Al（30 nm）. With the detailed investigation of electroluminescence of the novel organic yellow-light-emitting device, the authors found that the doping concentration of Rhodamine B（RhB） had a very big influence on luminance and efficiency of the organic yellow-light- emitting device. When doping concentration of Rhodamine B （RhB） was 1.5 wt%, the organic yellow-light-emitting device was obtained with the maximum current efficiency of 1. 526 cd· A^-1 and the maximum luminance of 1 309 cd · m^-2. It can be seen from the EL spectra of the devices that there existed energy transferring from Alq3 to RhB in the organic light-emitting layers. When the doping concentration of RhB increased, λmax of EL spectra redshifted obviously. The phenomenon was attributed to the Stokes effect of quanturn wells and self-polarization of RhB dye molecules.
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