Author/Authors :
Yamamoto، نويسنده , , Natasha A.D. and Lima، نويسنده , , Lucas F. and Perdomo، نويسنده , , Rodolfo E. and Valaski، نويسنده , , Rogério and Calil، نويسنده , , Vanessa L. and Macedo، نويسنده , , Andréia G. and Cremona، نويسنده , , Marco and Roman، نويسنده , , Lucimara S. Roman، نويسنده ,
Abstract :
The effect of poly(3,4-ethylenedioxythiophene)-polystyrenesulfonic acid (PEDOT:PSS) modified with an amphiphilic fluoro compound was investigated on the performance of flexible organic solar cells in bilayer geometry and using substrate based on poly(ether-imide) (PEI) with ITO films with low resistivity and high optical transmittance. The poly[9,9′-dioctyl-fluorene-co-bithiophene] (F8T2) polymer and fullerene (C60) were used as electron donor and acceptor materials, respectively. The spin-casted PEDOT:PSS films had its sheet resistance reduced from 7 MΩ sq−1 to 40 kΩ sq−1 after a single step treatment with hexafluoroacetone (HFA), reflecting in an enhancement of power conversion efficiency in the photovoltaic cells from 0.45% up to 1.30%.
