Interaction between Colloidal Quantum Dots and Halide Perovskites: Looking for Constructive Synergies.

Colloidal quantum dots (QDs) have received extensive attention during the last few decades because of their amazing properties emerging from quantum confinement. In parallel, halide perovskites have attracted attention because of the demonstration of very high performance, especially in solar cells, light-emitting diodes (LEDs), and other optoelectronic devices. Both families of materials can be prepared in a relatively simple way, facilitating their integration. There are several examples of their interaction enhancing the properties of the final nanocomposite. Perovskites can effectively passivate QDs or act as efficient charge transporters. QDs can be used to modify the selective contacts in perovskite devices or can be used as efficient light emitters or absorbers for enhanced LEDs and photodetectors, respectively. Moreover, QDs can seed the perovskite crystal growth, improving the morphology and ultimately the solar cell performance. In addition, new advanced devices can emerge as a result of the constructive synergy between both families of materials.