Size effect on organic optoelectronics devices: Example of photovoltaic cell efficiency

Electromagnetic study of organic photovoltaic cells design shows that electrical parameters depend drastically on the active area geometry: we theoretically show that electrical parameters are altered when the cell length becomes greater than one centimeter. Experimental verification is provided with simple molecular heterojunction cells with areas from 0.03 to 0.78 cm(2). (C) 2007 Elsevier B.V. All rights reserved.