Novel blue-light-emitting diodes based on nanostructured ZnSe/ZnS multilayer films
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In this work, we demonstrated a organic/inorganic hybrid blue-light-emitting diodes (LEDs) device, where nanostructured ZnSe/ZnS multilayer films were used as light-emitting layer and poly(3,4-ethylene-dioxythiophene)–poly(styrene-sulfonate) acted as hole injection layer. Both intense blue photoluminescence and electroluminescence emission of this device were observed. The turn-on voltage of the blue LEDs was about 14 V with the forward voltage. The current density reached around 2000 mA/cm2 when the forward voltage was 21 V. In addition, the electroluminescence mechanism of this structure was analyzed in detail. These results offered a new idea in the field of blue LEDs. Meanwhile, blue LEDs with perfect performance are good for the realization of full-color displays and white LEDs.
This work was financially supported by the Natural Science Foundation of China (Grant Nos. 61275058, 51772019). It was also supported by the Key Laboratory of Luminescence and Optical Information of China in Beijing Jiaotong University.
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