We fabricate inverted organic/inorganic hybrid solar cells based on vertically oriented ZnO nanorods and polymer MEH-PPV. The morphology of ZnO nanorods and ZnO nanorods/MEH-PPV hybrid structure is depicted by using scanning electron microscopy (SEM), X-ray diffraction (XRD), and atomic force microscope (AFM), respectively. It is observed that ZnO nanorods array grows primarily aligned along the perpendicular direction of the ITO substrate. The MEH-PPV molecule does not enter the interspace between ZnO nanorods completely according to SEM picture. It results in the small and bad contact area between ZnO nanorods and MEH-PPV. To improve the photovoltaic performance, we also fabricate another kind of photovoltaic (PV) device modified by N 719 dye, and exploit the effect of N 719 . After the modification of ZnO nanorods by N 719 , not only J sc increases from 0.257 mA/cm 2 to 0.42 mA/cm 2 , but also V oc enhances from 0.37 V to 0.42 V. Insert LiF buffer layer between MEH-PPV and anode, J sc of 1.05 mA/cm 2 is obtained, and it is 2.5 times that the device without LiF.ZnO nanorods, inorganic/organic hybrid solar cell, N 719 dye, LiF
In this paper, a new upconversion luminescent material co-doped with Erbium and Ytterbium is reported. The upconversion luminescence transition routes and related properties are studied. The results show that the absorption and emission intensities under excitation of 980 nm laser increase with the increase of the Yb 3+ concentration. The red emission is stronger than the green emission. The energy transfer process plays an important role in the upconversion mechanism.upconversion, luminescence, Er 3+ , Yb 3+
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