All-solution blade-slit coated polymer light-emitting diodes

► All-solution processed PLEDs can be fabricated by a blade-slit coating method. ► HIL, EML, ETL, EIL layers can be blade-slit coated in a large cell-size (100 mm × 50 mm). ► Uniformity of a blade-slit coated film is better than that of a spin-coated film. ► Efficiency of a blade-slit coated device is comparable to that of a spin-coated one.