Physics – Condensed Matter – Materials Science
Scientific paper
2007-07-03
Phys. Rev. B 76, 115203 (2007)
Physics
Condensed Matter
Materials Science
Scientific paper
10.1103/PhysRevB.76.115203
We have synthesized, crystallized and studied the structural and electric transport properties of organic molecular crystals based on a rubrene derivative with {\em t}-butyl sidegroups at the 5,11 positions. Two crystalline modifications are observed: one (A) distinct from that of rubrene with larger spacings between the naphtacene backbones, the other (B) with a in-plane structure presumably very similar compared to rubrene. The electric transport properties reflect the different structures: in the latter phase (B) the in-plane hole mobility of 12 cm$^2$/Vs measured on single crystal FETs is just as high as in rubrene crystals, while in the A phase no field-effect could be measured. The high crystal quality, studied in detail for B, reflects itself in the density of gap states: The deep-level trap density as low as $10^{15}$ cm$^{-3}$ eV$^{-1}$ has been measured, and an exponential band tail with a characteristic energy of 22 meV is observed. The bulk mobility perpendicular to the molecular planes is estimated to be of order of $10^{-3}$ -- $10^{-1}$ cm$^2$/Vs.
Batlogg Bertram
Berens U.
Gundlach D. J.
Haas Stephan
Kirner H.-J.
No associations
LandOfFree
High charge-carrier mobility and low trap density in a rubrene derivative does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with High charge-carrier mobility and low trap density in a rubrene derivative, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and High charge-carrier mobility and low trap density in a rubrene derivative will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-179984