Recent advances and perspectives on light emitting diodes fabricated from halide metal perovskite nanocrystals

Abstract

With the growing demand for the next-generation light emitting diode (LED) display and lighting, considerable progress has been realized in the development of various LEDs for research and consumer market. Among diverse emitting materials, all-inorganic perovskite CsPbX₃ (X = Cl, Br, I) nanocrystals (NCs) have emerged as active and promising candidates in LEDs due to their high photoluminescence quantum yield (PLQY), high color purity and tunable emission. Over the past four years, a deeper understanding and higher efficiency have been achieved in CsPbX₃ NC-based LEDs. These encouraging facts foreshadow the further progress and commercialization in this burgeoning field. Herein, the recent advancements in CsPbX₃ NC-based LEDs have been reviewed. The synthesis and passivation methods of CsPbX₃ NCs are firstly introduced. Then we summarize the approaches for the fabrication of highly efficient and stable LEDs based on CsPbX₃ NCs, including the modification of emitting layers and optimization of structures. Finally, some challenges and possible solutions are suggested for the development of CsPbX₃ NC-based LEDs.