Abstract
This work demonstrated a simple method to obtain polymer solar cells used high conductivity transparent electrode by flexography printing and water washing treatment. The silver grid of square and hexagon shapes was fabricated by flexography printing on poly(ethylene terephthalate) (PET) substrate. The silver pattern was firstly dried in an oven under 120 °C, then was placed into the deionized water. The sheet resistance of two shape grid is reduced nearly two orders of magnitude to those without water washing. The ITO-free polymer solar cells based on poly(3-hexylthiophene) (P3HT) and [6, 6]-Phenyl C61 butyric acid methyl ester (PCBM) was fabricated. The poly(3, 4-ethylenedioxythiophene) poly(styrene sulfonate) (PEDOT:PSS) was coated on the transparent electrode as the anode modification layer. The confocal laser scanning microscope (CLSM) showed the morphological changes of the two silver patterns after water washing and the PEDOT: PSS coating. We completed two devices by spin coating the active layer and vacuum thermal evaporating cathode. The device with hexagon shape silver grid achieved a power conversion efficiency of 0.37%.
Published Version
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