Advancements in Surface Engineering of Perovskite Quantum Dots

The field of optoelectronics has seen a transformative impact with the advent of solution-processed perovskite quantum dots (QDs). These nanoparticles are prized for their outstanding optical and electronic properties, which can be finely controlled by adjusting the ratios of mixed halide anions. This flexibility allows their emission color to be tuned across the entire visible spectrum, making perovskite QDs an ideal choice for ultra-high-definition displays. Since their initial chemical synthesis in 2014, research has increasingly focused on the surfaces of these QDs due to their susceptibility to forming non-radiative recombination centers, which hampers long-term stability. The insulating organic ligands bound to the surface further challenge carrier injection and transport. Thus, the quest for effective surface reconstruction strategies is crucial for improving the performance of devices incorporating perovskite QDs.

This Research Topic aims to spotlight current progress in the surface engineering of perovskite QDs. By exploring new methodologies to stabilize their surface chemistry and facilitate better carrier injection and transport, we seek to uncover new pathways for enhancing their practical applications. In particular, we encourage research that identifies key drivers of instability in QD surfaces and develops innovative materials and technologies to overcome these challenges.

To gather further insights into the complexities and innovations in this area, we welcome articles addressing, but not limited to, the following themes:

• Design and synthesis of perovskite nanomaterials, including lead-based/lead-free QDs, nanocrystals, and nanosheets

• Fundamental investigations into the surface chemistry of perovskite nanomaterials

• Strategies for surface restructuring to boost optical properties, charge transport, and long-term stability

• Applications of perovskite QDs in a variety of optoelectronic devices

• Emerging technologies driving the use of perovskite QDs in energy conversion and information technology

We invite the submission of Original Research, Review, Mini-Review, and Perspective articles that delve into these aspects of perovskite QDs.