Low-dimensional perovskite materials for efficient and stable light-emitting diodes and photon detection arrays

Halide perovskites have emerged as a novel class of revolutionary semiconductors with wide tunability of energy bandgap, low cost, and simple solution process for optoelectronic devices such as LEDs, and photodetectors. In this talk, we will discuss the effects of ligands on low-dimensional perovskites including the defects passivation, phase distribution, carrier transportation, and confinement for improving the efficiency and stability of perovskite LEDs. Meanwhile, by introducing the new approaches of double-side crystallization and passivation, we realize high-performance perovskite photodetectors with a wide detection range from UV to NIR will be described. The work contributes to paving perovskites for practical optoelectronics.