NPB和TPBi作为间隔层调控OLED激子复合区域
发布时间：2019-04-10 14:31
【摘要】：以ITO/MoO_3/NPB/Ir(ppy)_3/TPBi/Cs_2CO_3/Al器件为基础,采用NPB和TPBi作为间隔层(spacer)制备了器件ITO/MoO_3/NPB/Ir(ppy)_3/NPB(spacer)/TPBi/Cs_2CO_3/Al和ITO/MoO_3/NPB/TPBi(spacer)/Ir(ppy)_3/TPBi/Cs_2CO_3/Al,并通过调节间隔层厚度、分析器件的电致发光(EL)光谱,研究其对激子复合区域的调控。实验结果表明,所有器件的激子复合区域均位于NPB和Ir(ppy)_3,且复合区域随电压的增大和间隔层的增厚向NPB移动。NPB(spacer)的厚从0nm增至10nm,色坐标均匀变化,总变化值Δ(x,y)(0.02,0.10);而TPBi(spacer)对应的色坐标变化量Δ(x,y)(0.04,0.20),厚≤6nm时,光谱变化较小(即调节幅度较小),而10nm时光谱变化较大。这表明,通过调节间隔层材料或者厚度,就能简单、方便地调控激子复合区域,为不同复合区域发光强度的粗调/微调和白光器件的设计提供依据。
[Abstract]:Based on the ITO/MoO_3/NPB/Ir (ppy) _ 3/TPBi/Cs_2CO_3/Al device, The devices ITO/MoO_3/NPB/Ir (ppy) _ 3/NPB (spacer) / TPBi/Cs_2CO_3/Al and ITO/MoO_3/NPB/TPBi (spacer) / Ir (ppy) _ 3/TPBi/ were fabricated by using NPB and TPBi as spacer (spacer). Cs_2CO_3/Al, By adjusting the thickness of the spacer layer, the electroluminescent (EL) spectra of the device were analyzed, and its regulation on the exciton complex region was studied. The experimental results show that the exciton composite regions of all devices are located in NPB and Ir (ppy) _ 3, and the composite region moves to NPB with the increase of voltage and the thickness of the spacer layer. The thickness of NPB (spacer) increases from 0nm to 10 nm, and the color coordinates vary uniformly. The total change value 螖 (x, y) (0.02, 0.10); While the color coordinate change 螖 (x, y) (0.04,0.20) corresponding to TPBi (spacer), the spectral variation is smaller (i.e., the adjustment amplitude is smaller) when the thickness 鈮，
本文编号：2455878
[Abstract]:Based on the ITO/MoO_3/NPB/Ir (ppy) _ 3/TPBi/Cs_2CO_3/Al device, The devices ITO/MoO_3/NPB/Ir (ppy) _ 3/NPB (spacer) / TPBi/Cs_2CO_3/Al and ITO/MoO_3/NPB/TPBi (spacer) / Ir (ppy) _ 3/TPBi/ were fabricated by using NPB and TPBi as spacer (spacer). Cs_2CO_3/Al, By adjusting the thickness of the spacer layer, the electroluminescent (EL) spectra of the device were analyzed, and its regulation on the exciton complex region was studied. The experimental results show that the exciton composite regions of all devices are located in NPB and Ir (ppy) _ 3, and the composite region moves to NPB with the increase of voltage and the thickness of the spacer layer. The thickness of NPB (spacer) increases from 0nm to 10 nm, and the color coordinates vary uniformly. The total change value 螖 (x, y) (0.02, 0.10); While the color coordinate change 螖 (x, y) (0.04,0.20) corresponding to TPBi (spacer), the spectral variation is smaller (i.e., the adjustment amplitude is smaller) when the thickness 鈮，
本文编号：2455878
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