Low cost patterning of poly(3,4-ethylenedioxythiophene) poly(styrenesulfonate) films to increase organic photovoltaic device efficiency

Emah, J. B.; Curry, R. J.; Silva, S. R. P.
September 2008
Applied Physics Letters;9/8/2008, Vol. 93 Issue 10, p103301
Academic Journal
A low-cost lithographic technique to pattern poly(3,4-ethylenedioxythiophene) poly(styrenesulfonate) (PEDOT:PSS) films with 10 nm deep features of 700 nm periodicity is demonstrated. The use of these patterned films in poly(3-hexylthiophene):[6,6]-phenylC61-butyric acid methyl ester organic photovoltaic devices leads to an increase in short circuit current (Jsc), fill factor, and power conversion efficiency (PCE) with only a slight reduction in open circuit voltage. Patterning the PEDOT:PSS at 150 °C increases Jsc from 2.44 to 3.03 mA/cm2 improving the PCE from 0.63% to 0.81% with similar increases due to patterning also being obtained at other temperatures.


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