Diamond offers unique opportunities for applications in photonics, essentially because its very large band-gap leads to a wide transparency window and to the availability of numerous color centers. However, it is still challenging to obtain scalable and reproducible optoelectronics based on these defects. An important aspect in this respect is represented by the feasibility of electroluminescence devices, which combine diamond electronics with the photo-physics of color centers. Here, we demonstrate electrically-driven light emission from color centers based on a phosphorous-doped diamond Schottky diodes. Compared to conventional p-i-n systems, our approach simplifies the fabrication process, and it promotes the implementation of novel light sources based on diamond.
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