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High electron mobility in bathophenanthroline

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4 Author(s)
Naka, Shigeki ; Department of Electric and Electronic Engineering, Toyama University, Toyama 930-8555, Japan ; Okada, Hiroyuki ; Onnagawa, Hiroyoshi ; Tsutsui, Tetsuo

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We have measured electron mobility in vacuum-deposited films of 4,7-diphenyl-1,10phenanthroline (bathophenanthroline, or BPhen) using a time-of-flight technique. Electron transport was highly dispersive for BPhen with a dispersion parameter of a value 0.30. The electron mobility in excess of 10-4cm2/V s has been observed at electric fields of the order of 105V/cm with weakly dependent on the electric field. The characteristic energy of the distribution is obtained a value 0.09 eV. It is directly confirmed that the BPhen has superior electron-transport capability. © 2000 American Institute of Physics.

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Applied Physics Letters  (Volume:76 ,  Issue: 2 )