Current Status and Challenges in Indium Phosphide Quantum Dots and Their Electroluminescence

Quantum dots（QDs），as an ideal light-emitting material，have been attracting a lot of attention from scientists and industry，advancing the development of bio-imaging，lighting，display and other fields. With the gradual increase in awareness of ecological and environmental protection，indium phosphide quantum dots（InP QDs）have received widespread attention as one of the best alternatives to cadmium-based quantum dots. On the one hand，InP QDs have luminescence and photovoltaic properties comparable to those of cadmium-based quantum dots. On the other hand，their luminescence spectral range can cover the entire visible region，and their synthesis process is common to that of cadmium-based quantum dots. However，as InP QDs are special in terms of elemental valence，core-shell lattice matching and reaction kinetics compared to traditional cadmium-based QDs，the development of their synthetic chemistry is still immature，which limits the research process of their photovoltaic applications. Here，we review the indium phosphide QDs system on its development and future needs for displays，by analyzing the current status，problems，challenges，and making an outlook on it. We expect to provide some insights and help for further exploratory research on QDs and their electroluminescent devices（QLEDs），and to promote the development of cadmium-free，low-toxicity，high-colour purity QDs system. © 2024 Editorial Office of Chinese Optics. All rights reserved.