Influence of Active Layer and Cathode Thickness on the Efficiency of Translucent Organic Solar Cells

The optical and photoelectrical properties of active layers of various thicknesses fabricated using the D18 donor polymer and the Y6 acceptor were analyzed. Based on the absorption, photoluminescence, and external quantum efficiency spectra, the light-absorption efficiency and charge-carrier separation capability of the D18:Y6 blend were investigated. Our findings showed that for semi-transparent organic solar cells (ST-OSCs), the optimal active-layer thickness is 90 nm and ultimately, the D18:Y6 active layer is a highly efficient, stable and promising material for ST-OSCs.

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