Quantum dots are considered as ideal luminescent materials for high color gamut,flexible,and large area display,medical devices,and the application of other fields,due to their unique photoelectric properties.Compared with the quantum dots of binary Ⅱ-Ⅵ or Ⅲ-Ⅴ group,the quantum dots of ternary Ⅰ-Ⅲ-Ⅵ2 group have significant advantages in terms of ecological and environmental friendliness without containing Cd or Pb elements,large Stokes shift with adjustable band gap,long-life luminescence,etc.Moreover,it is facile to obtain emission wavelength adjustable continuously from visible to near-infrared region by changing chemical elements ratio in the composition of single Ⅰ-Ⅲ-Ⅵ2 family.These characters make the Ⅰ-Ⅲ-Ⅵ2 quantum dots have broad application prospects in the fields of light-emitting diodes,solar cells,photodetectors,biological imaging,etc.This paper systematically reviews the synthesis methods and optical performance optimization strategies of quantum dots and those suitable for Ⅰ-Ⅲ-Ⅵ2 quantum dots,explains the luminescence mechanisms of Ⅰ-Ⅲ-Ⅵ2 quantum dots based on their electronic band structures,summarizes recent-years progress of quantum dots application in lighting and display devices,and focuses on the application progress of the Ⅰ-Ⅲ-Ⅵ2 quantum dots in photo-and electroluminescent diodes.Finally,the future prospects and challenges of Ⅰ-Ⅲ-Ⅵ2 quantum dots are prospected.
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