| 초록 |
Metal halide perovskites have recently attracted a lot of attention as promising materials for solution-processed light-emitting diodes (LEDs). However, the thin film of all-inorganic perovskite LEDs are rarely reported, as opposed to the recorded high efficiencies obtained from organic-inorganic hybrid perovskite LEDs. Because all-inorganic perovskite materials have low solubility and it is hard to control the thin film for good direction. Ideal perovskite light-emitting layers should have minimal defects, a uniform thickness, and a smooth film surface to avoid exciton quenching, nonradiative recombination, and current leakage. One of the major factors is morphology and crystal grain sizes of perovskite layers are known to be broadly tunable by various processing parameters. Here, we controlled the morphology and crystal grain size of perovskite layer via anti-solvent crystallization in order to improve the performance of CsPbBr3 perovskite LEDs. |
