论文标题
可见范围内ZnO介孔层的缺陷引起的电致发光的增强和调整
Enhancement and tuning of the defect-induced electroluminescence of ZnO mesoporous layers in the visible range
论文作者
论文摘要
我们展示了一种对溶液处理的介孔ZnO层的可见电致发光的方法。我们的方法包括在局部改变涂层ZnO层的纳米级形态，通过用薄的金属斑块对下面的表面进行图案。在金属上方，ZnO膜在簇中组织起来，从而增强其缺陷引起的电致发光。产生的发射发生在可见和近红外范围内的大量波长连续体上。这种广泛的发射连续体被设备内部发展的薄膜干扰过滤，从而通过调节其透明电极的厚度来制造具有不同颜色的LED。当用于改变ZnO层的形态的金属模式达到亚微米尺寸时，会出现其他等离子体效应，从而提供了额外的自由度来调整发射光子的颜色和极化。
We show a way to pattern the visible electroluminescence of solution-processed mesoporous ZnO layers. Our approach consists in locally changing the nanoscale morphology of the coated ZnO layers by patterning the underlying surface with thin metallic patches. Above the metal, the ZnO film is organized in clusters that enhance its defect-induced electroluminescence. The resulting emission occurs over a large continuum of wavelengths in the visible and near-infrared range. This broad emission continuum is filtered by thin film interferences that develop within the device, making it possible to fabricate LEDs with different colours by adjusting the thickness of their transparent electrode. When the metallic patterns used to change the morphology of the ZnO layer reach sub-micron dimensions, additional plasmonic effects arise, providing extra degrees of freedom to tune the colour and polarization of the emitted photons.
