White electroluminescence of n-ZnO:Al/p-diamond heterostructure devices

An n-ZnO:Al/p-boron-doped diamond heterostructure electroluminescent device is produced, and a rectifying behavior can be observed. The electroluminescence spectrum at room temperature exhibits two visible bands centred at 450 nm–485 nm (blue emission) and 570 nm–640 nm (yellow emission). Light emission with a luminance of 15 cd/m2 is observed from the electroluminescent device at a forward applied voltage of 85 V, which is distinguished from white light by the naked eye. (interdisciplinary physics and related areas of science and technology)