Lanthanide Ion‐Doped Perovskite Nanocrystals in Electroluminescent Device

Lanthanide ions doped in perovskite (LIDP) nanocrystals (NCs) provide an effective way to utilize the emission of lanthanide metals in a solution‐processable way, combining the theoretical photoluminance quantum yield (PLQY) of ≈200%. To utilize advantages, LIDP‐NCs have inspired studies exploring the fundamental physics of energy transfer, including the up‐conversion or down‐conversion process, and the optoelectronic applications of solar cells and white light‐emitting didoes. This review broadens the scope of LIDP nanocrystal matrix semiconductors in electroluminescence devices in the near‐infrared (NIR) range (>900 nm). A research is summarized on the synergistic effect of lanthanide ions and perovskite matrix in the near‐infrared region, and discuss from the perspective of fabrication of lanthanide‐based electroluminescent devices using perovskite materials as the matrix. The multiple optical transitions, bandgap tunability, and quantum‐cutting effect to provide a tutorial on understanding LIDP‐NCs are started. The details of synthesizing LIDP materials and aim to lay the foundation for preparing NIR electroluminescent devices with high efficiency and application value are then illustrated. The scientific issues that limit the performance of LIDP NCs‐based electroluminescent devices and discuss the potential strategies for the future development of LIDP material are focused on. The synergistic effect between lanthanide ions and perovskite matrix for electroluminescent devices is studied. The luminescent mechanism and synthesis methods for lanthanide‐ion‐doped perovskite (LIDP) nanocrystals are summarized and current challenges and potential strategies in LIDP‐based electroluminescent devices are analyzed. This discussion provides guidance for future LIDP‐based device development, drawing insights from organic/perovskite light‐emitting diodes to accelerate progress.