Introduction to Perovskite Quantum Dots and Metal-Organic Frameworks and the Development of Composites

All-inorganic perovskite quantum dots CsPbX3 (QDs) (X= Cl, Br, I) have a luminescence that can cover the entire visible light region (400 similar to 700 nm). A single luminescence peak is narrow and has a high quantum efficiency. Their emission wavelength and band gap can be regulated by regulating the halogen atom X in CsPbX3. CsPbX3 is widely used in the display field due to its excellent optical properties. However, it hinders its further applications. Metallic-organic framing (MOFs) are porous frame structures that serve as a matrix carrier to improve material stability due to their unique porous structure and permanent porosity. MOFs restricting QDs inside the subject can not only protect them from the external environment, isolating them from each other without reunion, but also realize various new features and applications. Composites (CsPbX3 QDs @ MOFs) that restrict QDs to MOFs have better optical properties than CsPbX3 QDs and better stability to the surrounding environment. Composites (CsPbX3 QDs@MOFs) have many applications in optoelectronic devices, sensors, encryption, and anti-counterfeiting. The review begins with the CsPbX3 QDs correlation structures, preparation, optical properties, applications, and existing problems. For example, in toxicity, stability, anion exchange and the corresponding solution, the structure, preparation, characteristics, and application of MOFs and further, the application of CsPbX3 QDs@MOFs, such as white light diodes (WLEDs), security and encryption, used as catalyst, remote white light transmitter, and realize the wide gamut application, verify these new composite applications in backlight display. This paper presents some problems and needs for improvement in the composite CsPbX3 QDs@MOFs, provides some ideas on the next direction of the composite materials, and makes prospects for the research prospect.