VALUABLE ERRORS. “Note that the image sensor is not operational with intrinsic graphene. P-doped graphene is required for the generation of an electron–hole pair upon light absorption. The imperfect graphene, made from non-optimized growth and transfer methods, is not only good for flat image sensing, but also object tracking, enabling advanced technologies such as autonomous vehicles.”
https://link.springer.com/article/10.1557/s43577-021-00135-y