Side-chain ionization enables ultrafast intramolecular singlet fission in the azaquinodimethane skeleton.

ABSTRACT: Singlet fission (SF) could significantly alleviate thermalization losses of high-energy photons, thus holding great potential for improving the power conversion efficiency of solar cells. Conventional SF materials require an intricate control of molecular packing motifs in the solid state to achieve efficient multiexciton generation. Small molecule intramolecular singlet fission (iSF) materials have emerged as promising alternatives and show great potential for practical device applications. However, the scope of such iSF materials remains rather limited, necessitating innovative molecular design strategies. Herein, we present how a side-chain ionization strategy leads to an iSF chromophore based on the azaquinodimethane (AQM) ring system. Systematic theoretical and spectroscopic analyses

SUBMITTER: Wu Z 

PROVIDER: S-EPMC12188654 | biostudies-literature | 2025 Jul

REPOSITORIES: biostudies-literature