Hybrid fiber for detection of UV light

A hybrid fiber for detecting ultraviolet (UV) light, the hybrid fiber comprising:

• a conductive fiber comprising a graphene material;
• a first layer comprising molybdenum trioxide (MoO3) deposited onto the conductive fiber, the MoO3 configured to transport holes and block electrons;
• a photoactive layer comprising a photoactive material coating the first layer, the photoactive material comprising a perovskite material and poly(N-vinylcarbazole) (PVK) or 1,1-bis[(di-4-tolylamino)phenyl]cyclohexane (TAPC);
• a second layer comprising a bathocuproine (“BCP”) material deposited onto the photoactive layer, the BCP material configured to block holes and transport electrons;
• and
• a transparent electrode comprising a multiwall carbon nanotube material or a graphene quantum dot material, the transparent electrode deposited onto the second layer,
• wherein, in an operation, with a reverse bias voltage across the conductive fiber and the transparent electrode, when the hybrid fiber is not illuminated by UV light, the second layer and the transparent electrode are configured to impede an injection of holes, and the conductive fiber and the first layer are configured to impede an injection of electrons, resulting in a dark current corresponding to a dark current density less than or equal to a threshold of the dark current density, and
• when the hybrid fiber is illuminated by UV light, the second layer and the transparent electrode are configured to allow an injection of holes in response to an operation of the photoactive layer, resulting in a photocurrent density of at least three orders of magnitude greater than the threshold of the dark current density.