Deposition of hole-transport materials in solid-state dye-sensitized solar cells by doctor-blading
We report using doctor-blading to replace conventional spin coating for the deposition of the hole-transport material spiro-OMeTAD (2,2',7,7'-tetrakis-(N,N-di-p-methoxyphenylamine)-9,9'-spirobifluorene) in solid-state dye-sensitized solar cells. Doctor-blading is a roll-to-roll compatible, large-area coating technique, is capable of achieving the same spiro-OMeTAD pore filling fraction as spin coating, and uses much less material. The average power conversion efficiency of solid-state dye-sensitized solar cells made from doctor-blading is 3.0% for 2-mu m thick films and 2.0% for 5-mu m thick films, on par with devices made with spin coating. Directions to further improve the filling fraction are also suggested. (c) 2010 Elsevier B.V. All rights reserved.
Record created on 2010-09-14, modified on 2016-08-08