Proceedings of nanoGe Fall Meeting 2021 (NFM21)
Publication date: 23rd September 2021
Low-cost large-area flexible transparent electrodes is the key component for the commercialization of organic solar cells (OSCs).1 In this study, we demonstrate that large-area silver nanowire (AgNW) based transparent electrodes can be prepared using a gravure printing method. By varying the blend ratio of the mixture solvent and the concentration of the silver nanowire (AgNW) inks, the surface tension, volatilization rate, and viscosity of the AgNW ink can be tuned to meet the requirements of gravure printing process. Following this method, transparent AgNW electrodes with a sheet resistance of 10–50 Ω/sq with a high light transparency of 95–99% (w/o sub) can be achieved. A smooth surface and excellent uniformity were also observed for the printed AgNW electrodes, rendering them excellent candidates for OSCs. Through device optimization, a high PCE of 13.61% and a high certified efficiency of 12.88% for a 1 cm2 flexible OSCs with PM6:Y6 as the photoactive layer was achieved.2
On this basis, we recently further gravure printed ZnO composite film on the AgNW electrodes. By adjusting the rheological properties of the ZnO ink, a large-area uniform and dense ZnO composite film is finally prepared on the AgNW electrodes. In the active layer system of PM6:Y6, a 14.36% high-efficiency 1cm2 flexible OSCs was obtained. This part of the work further proves that gravure printing is a feasible solution for the industrialization of organic solar cells.
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