  Single photon sources are required for a wide range of applications in
quantum information science, quantum cryptography and quantum communications.
However, so far majority of room temperature emitters are only excited
optically, which limits their proper integration into scalable devices. In this
work, we overcome this limitation and present room temperature electrically
triggered light emission from localized defects in zinc oxide (ZnO)
nanoparticles and thin films. The devices emit at the red spectral range and
show excellent rectifying behavior. The emission is stable over an extensive
period of time, providing an important prerequisite for practical devices. Our
results open up possibilities to build new ZnO based quantum integrated devices
that incorporate solid-state single photon sources for quantum information
technologies.
