Quantum information science and technology constitutes a highly interdisciplinary area of research, including physics, mathematics, electrical engineering, computer science and information theory, with the overall aim to improve current technologies by making use of the unique quantum properties at the nanoscale. A key ingredient for almost all optical quantum applications is the generation of single photons on demand. Here, we propose to integrate single semiconductor quantum dots and silicon vacancies into engineered nanoplasmonic environments to generate directional, ultra-fast, broadband and indistinguishable single photons with high efficiency. Novel linear and non-linear schemes for quantum light generation will be implemented, tested and compared in the participating laboratories. Here, plasmonic antennas will be crucial since they enable sub-wavelength focusing and polarisation control of light, ultra-high local field enhancements for broadband spontaneous emission control, straight-forward electrification, and mode-matched interfaces for optical and electrical devices. Future real-world applications will also call for CMOS-compatible, semiconductor based device architectures and the capability to be integrable into complex, on-chip quantum networks with high areal densities. We envision potential applications of those novel quantum light sources in quantum computing, quantum cryptography, quantum metrology, and quantum simulation.