Disorder-based Design Screening of a Semitransparent Ternary Organic/Silicon Four-Terminal Tandem Solar Cell

نوع مقاله : مقاله پژوهشی

نویسنده
Faculty of Physics, University of Tabriz, Tabriz
چکیده
Ternary organic solar cells provide greater flexibility in controlling light absorption, molecular packing, phase separation, and charge transport. In this work, a MATLAB-based model is used to investigate a semitransparent D18:L8-BO organic top cell optically coupled to crystalline silicon in a four-terminal (4T) tandem configuration. The effects of NVN concentration (0–20%) and Ag rear-electrode thickness (3–15 nm) are evaluated over a defined parameter range. The highest calculated output is obtained at 20% NVN and an Ag thickness of 3 nm. Under these conditions, the top-cell power-conversion efficiency (PCE) reaches 17.95%, while the normalized silicon power contribution is 16.58%, giving a total 4T PCE of 34.53%. The average visible transmittance (AVT) is 67.16%, and the silicon short-circuit current density is 28.08 mA cm⁻². The corresponding light-utilization efficiency (LUE) and figure of merit (FOM) are 12.05 and 23.19, respectively. These results provide a comparative basis for design screening rather than a prediction of fabricated-device performance. Experimental validation using a matching semitransparent device is still required.
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