Direct Probing of Photovoltaic Effect Generated in Double-Layer Organic Solar Cell by Electric-Field-Induced Optical Second-Harmonic Generation

作者：Taguchi Dai; Shino Tatsunori; Zhang Le; Li Jun; Weis Martin; Manaka Takaaki; Iwamoto Mitsumasa^*

来源：Applied Physics Express, 2011, 4(2): 021602.

DOI：10.1143/APEX.4.021602

By using time-resolved electric-field-induced optical second-harmonic generation (EFISHG) measurement, we directly probed photovoltaic effect generated in double-layer (pentacene/C(60)) organic solar cells (OSCs). The electric field in C(60) layer was selectively probed by using incident laser with a wavelength of 1,000 nm. Results showed that excess positive charges Q(s) = 1.5 x 10(-8) C/cm(2) accumulated at the pentacene/C(60) interface under photoillumination. These charges generated the interfacial voltage V(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.

• 出版日期2011-2