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Spin-coated poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) thin film was treated with H2 SO4 and used as hole injection layer in quantum-dot-based light-emitting diodes (QD-LEDs). Such QD-LEDs with a H2SO4-treated PEDOT:PSS layer demonstrate improved carrier injection efficiency and luminance. Especially, the electroluminescence stability was greatly improved as well. Nearly 72%...
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