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S-shaped current-voltage characteristics of organic solar devices
2010
Physical Review B
Measuring the current-voltage characteristic of organic bulk heterojunction solar devices sometimes reveals an s-shaped deformation. We qualitatively produce this behaviour by a numerical device simulation assuming a reduced surface recombination. Furthermore we show how to experimentally create these double diodes by applying an oxygen plasma etch on the indium tin oxide (ITO) anode. Restricted charge transport over material interfaces accumulates space charges and therefore creates s-shaped
doi:10.1103/physrevb.82.115306
fatcat:kxrexsmf2vfffkl6e7xprvawza