In the last decade, quantum dots (QDs) and nanoparticles (NPs) have been widely studied with their optoelectronic properties. Researchers and scientists have made a great effort to research and develop QDs and NPs for light emitting diodes (LEDs), solar cells, sensors, and other optoelectronic devices. Nowadays, QDs/NPs have gradually stepped into our life and been considered to be used in new-generation products such as bulk heterojunction solar cells and flexible displays with ultrawide color gamut. However, there are still existing difficulties and problem to be overcome and solved such as synthesis, carrier transport, stability, agglomeration/aggregation, and environmental issues for QDs and NPs materials.

We invite researchers and scientists to submit original research and review papers that will progress the research/development of QDs/NPs in practical applications and provide potential solutions for current problem and difficulties. We are particularly interested in material synthesis, dispersion of QDs/NPs, stability, QD/NP film engineering, carrier transport in optoelectronic devices (e.g., LEDs, displays, solar cells, sensors…), and environmental problem in this special issue.

Potential topics include, but are not limited to:

• Synthesis and characterization of QDs/NPs and polymer nanocomposite incorporating QDs/NPs
• Fluorescence, optoelectronic, carrier transport, stability, and other physical properties of QDs/NPs
• Self-assembled QDs/NPs to different nanostructures
• QDs in phosphor-converted LEDs and displays
• Electroluminescence of QDs/NPs in organic-based LEDs and displays
• QDs/NPs in solar cells and optoelectronic devices
• QDs/NPs for sensing and biomedical applications
• Explorations of new applications for QDs/NPs
• Environmental issues of QDs and NPs