Abstract
Previous studies on lateral photovoltaic effect (LPE) mostly focused on the silicon-based inorganic semiconductor devices. Herein, we investigated the LPE in an bulk heterojunction organic photovoltaic (OPV) cell with ITO/PEDOT:PSS/MEH-PPV:PCBM/Al structure. The LPE exhibits a linear dependence on the laser spot position, with position sensitivity of 2.97 mV/mm (ITO) and 0.53 mV/mm (Al) at 300K. The transverse I–V curves in the dark and under AM1.5 illumination show the typical rectifying characteristic and the photovoltaic properties of OPV cells. With the increase of temperature, the lateral photovoltage increases accordingly. The mechanism of LPE in OPV devices was also discussed. It can be a kind of promising position-sensitive detectors for organic electronic applications.
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