Cambridge Researchers Identify Mott-Hubbard Physics in Organic Radical Semiconductors

Researchers at the University of Cambridge have identified a groundbreaking property in an organic semiconductor molecule that challenges traditional theories of charge generation. Their findings, published in *Nature Materials*, reveal that organic radical semiconductors can display Mott-Hubbard physics, a phenomenon rooted in quantum mechanics. This discovery connects longstanding principles of physics with modern material science and could have implications for solar energy technologies.

The study highlights how these organic molecules exhibit behavior previously associated only with inorganic materials. Specifically, the researchers observed that the charge generation mechanism within these semiconductors aligns with Mott-Hubbard physics, which describes electron interactions in certain systems. This marks a significant departure from conventional understanding of how charges are generated and transported in organic materials. The research team suggests this insight could pave the way for advancements in energy harvesting applications, including solar cells.

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Date: October 1, 2025

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Mark Chiang