Preface to Special Topic on Quantum Dot Semiconductor Optoelectronic Materials, Devices, and Characterization

• Quantum dots exhibit unique size-, composition-, surface-, and process-dependent optoelectronic properties, enabling diverse applications. • Surface chemical engineering on QDs can significantly enhance their optoelectronic performance, such as photoluminescence quantum yield. • Three-dimensionally confined QDs achieve near-perfect photoluminescence quantum yields and extended hot carrier cooling times. • Colloidal synthesis and processing with industrially friendly solvents are driving transformative changes in electronics, photonics, and optoelectronics.