Single-molecule electroluminescence and photoluminescence: including electrically driven single-molecule light sources, "single-molecule" superradiance, single-molecule plasmonic lasing, and single-molecule single-photon sources. Research will also be extended to (1) the dynamic studies of single-molecule optoelectronic effects via TCSPC lifetime measurements by introducing electrical or optical pulses and HBT photon correlation measurements, (2) the quality improvement of emitted photons from a single molecule with respect to the brightness (intensity), monochromaticity (band width), polarization, and coherency, and (3) the exploration of potential applications of electrically driven nano-emitters and single-photon sources in the nano-optoelectronic integration and quantum information processing.