Investigation of Synthesis and Deposition Methods for Cesium-Based Perovskite Quantum Dots for Solar Cell Applications

The CsPbI₂Br perovskite quantum dots (PQDs) have great potential in photovoltaic applications due to their phase stability and optoelectronic properties. In this work, the synthesis technique of CsPbI₂Br PQDs with the investigation of their properties and applications are identified. The critical issues and precautions for preparing PQDs are also discussed. It is also interesting to find that the collected supernatant solutions during the purification of PQDs can be recycled for preparing other types of PQDs. Meanwhile, this work demonstrates different approaches (i) thermal annealing, usage of (ii) methyl acetate and (iii) ethyl acetate as anti-solvents for preparing CsPbI₂Br PQDs in the form of thin films on glass substrates. The obtained samples are characterized in terms of morphology, structural and optical properties. The results of this work can provide useful information for researchers, particularly for those who are starting to synthesize PQDs for fabrications of solid-state devices.