Quintet formation, exchange fluctuations, and the role of stochastic resonance in singlet fission

Abstract

Quintet formation is a part of a photochemical energy conversion process, which could be exploited to help achieve higher efficiency values for photovoltaics. Here, the authors propose a stochastic and coherent resonance mechanism for formation of the quintet spin state in singlet fission materials, that is still viable in the strong-exchange regime.