Investigation of the Voltage Establishment and Relaxation Processes in a Double-Layer Device by Time-Resolved Optical Second-Harmonic Generation

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概要

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• By using time-resolved electric-field-induced optical second-harmonic generation (TR-EFISHG) measurements, we studied the voltage establishment in an indium tin oxide (ITO)/polyimide/pentacene/Au double-layer device in terms of Maxwell--Wagner type charging and discharging. Results showed that the voltage establishment and relaxation in the pentacene layer depend on the polarity of the applied voltage, suggesting different carrier behaviors of electrons and holes in the pentacene layer. The interfacial relaxation time ($\tau_{\text{MW}}$) also showed a different voltage dependence on the carrier species. A computer simulation using the relaxation time ratio $T_{\text{r}}$ $(= \tau_{\text{RC}}/\tau_{\text{MW}})$ well accounts for the results.

• 2011-04-25

著者

• Zhang Le

  Department Of Chemistry Wuhan University

• Manaka Takaaki

  Department Of Physical Electronics Graduate School Of Science And Engineering Tokyo Institute Of Tec

• Iwamoto Mitsumasa

  Department Of Electrical And Electronic Engineering

• Taguchi Dai

  Department Of Physical Electronics Tokyo Institute Of Technology

• Li Jun

  Department Of Biochemistry Zhongshan School Of Medicine Sun Yat-sen University

• Li Jun

  Department of Physical Electronics, Tokyo Institute of Technology, 2-12-1 S3-33, O-okayama, Meguro, Tokyo 152-8552, Japan

• Zhang Le

  Department of Physical Electronics, Tokyo Institute of Technology, 2-12-1 S3-33, O-okayama, Meguro, Tokyo 152-8552, Japan

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