Research Project
Full description Silicon photodiodes are currently the workhorse for image sensors used in digital cameras and smartphones. However, silicon has a band gap of 1.1 eV leading to an unwanted near-IR photoresponse. In photodi-odes, this is a source of optical noise that reduces image quality, and increases architectural complexity and cost to suppress. To replace or rival silicon as the photojunction, any substitute must deliver at least the same figures of merit, but preferably have simpler and cheaper fabrication. Organohalide lead perovskites have recently emerged as a leading next generation thin film solar cell technology. Although their basic electrical and optical properties have yet to be fully elucidated, organohalide perovskite solar cells could in principle be optimized for photodiode operation in the same way as organic solar cells have been