CAJ | 학술논문

随着OLEDs的发展,有机/聚合物材料体系的放大自发发射也得到了广泛深入的研究.利用Lloyd镜面体系构建了分布反馈体系,研究了DCJTB在向列相液晶中的放大自发发射过程,利用布拉格方程计算了发射光谱的峰值波长.实验结果表明,DCJTB向列相液晶体系的放大自发发射阈值为与平面波导结构相比,分布反馈体系提供了良好的模式,半峰全宽明显变窄;随着电场的变化,不同角度的输出信号强度也变化明显,利用电场可以有效的对TE、TM两种模式的强度进行调制.
수착OLEDs적발전,유궤/취합물재료체계적방대자발발사야득도료엄범심입적연구.이용Lloyd경면체계구건료분포반궤체계,연구료DCJTB재향렬상액정중적방대자발발사과정,이용포랍격방정계산료발사광보적봉치파장.실험결과표명,DCJTB향렬상액정체계적방대자발발사역치위여평면파도결구상비,분포반궤체계제공료량호적모식,반봉전관명현변착;수착전장적변화,불동각도적수출신호강도야변화명현,이용전장가이유효적대TE、TM량충모식적강도진행조제.
With the development of OLEDs, amplified spontaneous emission based on organic/polymer semiconductor materials have attracted a considerable amount of interest. We report the studies on ASE (amplified spontaneous emission) in nematic liquid crystal waveguide doped with DCJTB ( 2- ( 1,1-dimethylethyl ) -6 ( 2- ( 2,3,6,7-tetrahydro-1,1,7,7-tetramethyl-1-1H,5H-benzo(ij) quinolizin-9-yl)ethenyl)-4H-Pyran-4-ylidene) propanedinitrile) films utilizing a photo-induced distributed feedback (DFB) resonator, which is provided by two-beam interference using Lloyd mirror configuration. It is found that the full width at half maximum of the DFB resonator is much narrower than that of planar waveguide model. The effects of applied electric field on output intensity are also investigated at different observed angles. The output intensity of TE or TM model can be tuned by the external electric field.