Optics and Photonics Society of Iran

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 Polymer solar cells attracted a lot of attention due to their low cost and ability of high power conversion efficiency. One of the important features of organic solar cells is their application in transparent devices, leads to the emergence of novel perspectives in applications such as windows, curtains and roof coverings to generate electricity for buildings and cars and many architectural applications. Recently, non-fullerene small molecule acceptors known as good alternative to conventional fullerene acceptors. In this paper, we simulate ternary polymer solar cell with a non-fullerene acceptor with semi-transparent properties. The results show that with increasing the thickness of the active layer, the short-circuit current gradually increases, but the filling factor decreases due to the increase in recombination, which leads to an increment in the conversion efficiency up to a certain value, and then decreases. In this work, the optimal thickness of the active layer is 100 nm. Also, the quantum efficiency of the structure increases with thickness at wavelengths shorter than 500 nm and decreases for higher wavelengths due to increased recombination in the active layer, which leads to reduced carrier shrinkage.

Keywords: organic materials, non-fullerene materials, ternary solar cell, semi-transparent polymer.

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