Direct Probing of Photovoltaic Effect Generated in Double-Layer Organic Solar Cell by Electric-Field-Induced Optical Second-Harmonic Generation
Direct Probing of Photovoltaic Effect Generated in Double-Layer Organic Solar Cell by Electric-Field-Induced Optical Second-Harmonic Generation
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DOI：
10.1143/apex.4.021602
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发表时间：
2011-01
影响因子：
2.3
通讯作者：
D. Taguchi;Tatsunori Shino;Le Zhang;Jun Li;M. Weis;T. Manaka;M. Iwamoto
中科院分区：
文献类型：
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作者：
D. Taguchi;Tatsunori Shino;Le Zhang;Jun Li;M. Weis;T. Manaka;M. Iwamoto
通过使用时间分辨电场诱导光学二次谐波产生（EFISHG）测量，我们直接探测了双层（并五苯/C60）有机太阳能电池（OSC）中产生的光伏效应。使用波长为1000 nm的入射激光选择性地探测C60层中的电场。结果表明，在光照下并五苯/C60界面处积累了过量的正电荷Qs=1.5×10-8 C/cm2。这些电荷产生界面电压 Vs=0.16 V 并使 OSC 中的电势分布变形。 EFISHG 测量是直接捕捉 OSC 双层界面处的光伏效应载流子行为的有效方法。
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 Qs=1.5×10-8 C/cm2 accumulated at the pentacene/C60 interface under photoillumination. These charges generated the interfacial voltage Vs=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.