期刊
PHYSICAL REVIEW LETTERS
卷 109, 期 17, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.109.176601
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资金
- Solvay S. A.
- Office of Naval Research [N00014-11-1-0313]
- National Science Foundation [DMR-1005892]
- German Academic Exchange Service (DAAD)
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [1005892] Funding Source: National Science Foundation
Tail states in organic semiconductors have a significant influence on device performances by acting as traps in charge transport. We present a study of the controlled passivation of acceptor tail states in fullerene C-60 by the addition of electrons introduced by molecular n doping. Using ultralow doping, we are able to successively fill the traps with charges and examine the changes in conductivity, activation energy, mobility, and Fermi-level position. Passivation of the traps leads to an increase of the electron mobility in C-60 by more than 3 orders of magnitude, to reach 0.21 cm(2)/(Vs).
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