  Compact and electrically controllable on-chip sources of indistinguishable
photons are desirable for the development of integrated quantum technologies.
We demonstrate that two quantum dot light emitting diodes (LEDs) in close
proximity on a single chip can function as a tunable, all-electric quantum
light source. Light emitted by an electrically excited driving LED is used to
excite quantum dots the neighbouring diode. The wavelength of the quantum dot
emission from the neighbouring driven diode is tuned via the quantum confined
Stark effect. We also show that we can electrically tune the fine structure
splitting.
