Journal
PHYSICAL REVIEW LETTERS
Volume 103, Issue 2, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.103.027404
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Funding
- Lithuanian State Science and Studies Foundation
- Deutsche Forschungsgemeinschaft (DFG)
- Fonds der Chemischen Industrie (FCI)
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We used time-resolved electric-field-induced second-harmonic generation to probe the charge-carrier-mobility dynamics in amorphous organic materials on an ultrafast time scale. We were able to show that the mobility in poly-spiro-bifluorene-co-benzothiadiazol decreases from 0.1 cm(2)/V s at 1 ps to 10(-6) cm(2)/V s within 1 mu s. We attribute this dramatic decrease to the relaxation of the charge carriers within the density of states, clearly demonstrating the impact of disorder on the nanoscale charge transport in amorphous semiconductors.
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