Spin Fine Structure Reveals Biexciton Geometry in an Organic Semiconductor.

  title={Spin Fine Structure Reveals Biexciton Geometry in an Organic Semiconductor.},
  author={Kamila Yunusova and Sam L. Bayliss and Thierry Chaneli{\`e}re and V. O. Derkach and John E. Anthony and Alexei D Chepelianskii and Leah R. Weiss},
  journal={Physical review letters},
  volume={125 9},
In organic semiconductors, biexcitons are key intermediates in carrier multiplication and exciton annihilation. Their local geometry governs their electronic properties and yet has been challenging to determine. Here, we access the structure of the recently discovered S=2 quintet biexciton state in an organic semiconductor using broadband optically detected magnetic resonance. We correlate the experimentally extracted spin structure with the molecular crystal geometry to identify the specific… 

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