Abstract
Despite the great interest organic spintronics has recently attracted, there is only a partial understanding of the fundamental physics behind electron spin relaxation in organic semiconductors. Mechanisms based on hyperfine interaction have been demonstrated, but the role of the spin-orbit interaction remains elusive. Here, we report muon spin spectroscopy and time-resolved photoluminescence measurements on two series of molecular semiconductors in which the strength of the spin-orbit interaction has been systematically modified with a targeted chemical substitution of different atoms at a particular molecular site. We find that the spin-orbit interaction is a significant source of electron spin relaxation in these materials. © 2013 American Physical Society.
Original language | English (US) |
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Journal | Physical Review Letters |
Volume | 110 |
Issue number | 21 |
DOIs | |
State | Published - May 23 2013 |
Externally published | Yes |
ASJC Scopus subject areas
- General Physics and Astronomy