Direct Probing of Photovoltaic Effect Generated in Double-Layer Organic Solar Cell by Electric-Field-Induced 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 (EFISHG) measurement, we directly probed photovoltaic effect generated in double-layer (pentacene/C60) organic solar cells (OSCs). The electric field in C60 layer was selectively probed by using incident laser with a wavelength of 1,000 nm. Results showed that excess positive charges $Q_{\text{s}}=1.5\times 10^{-8}$ C/cm2 accumulated at the pentacene/C60 interface under photoillumination. These charges generated the interfacial voltage $V_{\text{s}}=0.16$ V and deformed a potential profile in the OSCs. The EFISHG measurement is an effective way for directly catching carrier behavior at the double-layer interface in OSCs in terms of the photovoltaic effect.

• 2011-02-25

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

• WEIS Martin

  Institute of Electronics and Photonics, Slovak University of Technology

• Shino Tatsunori

  Department of Physical Electronics, Tokyo Institute of Technology, Meguro, Tokyo 152-8552, Japan

• Weis Martin

  Institute of Physics, Slovak Academy of Sciences, Dúbravská cesta 9, 845 11 Bratislava 45, Slovak Republic

• Zhang Le

  Department of Physical Electronics, Tokyo Institute of Technology, Meguro, Tokyo 152-8552, Japan

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