en سلول‌های خورشیدی Photovoltaic Cells پژوهشي Research <span style="font-size:11pt"><span style="font-family:&quot;Times New Roman&quot;,&quot;serif&quot;"><span style="font-weight:bold">Despite decades of research on ternary organic solar cells, accurate prediction and precise definition of their blend properties remain challenging. In this work, we investigate the interdependence between composition ratio and optoelectronic properties in a PM6:Y6:ITIC-M cascade-type ternary organic solar cell using drift&ndash;diffusion simulations combined with experimental parameters. Key parameters, including effective bandgap, electron affinity, dielectric permittivity, doping density, and trap density, were extracted and modeled as functions of the ITIC-M weight percentage. Comprehensive characterization through morphological analysis (RMS roughness), electrical measurements (carrier mobility), and photovoltaic performance metrics revealed strong correlations with the dielectric permittivity (<i>&epsilon;</i>), enabling more accurate predictions. The proposed predictive model establishes a direct link between blend ratio and performance parameters&mdash;such as mobility and surface roughness&mdash;thus providing valuable guidance for optimizing ternary organic photovoltaic materials in future research.</span></span></span><br> &nbsp; cascade, drift-diffusion, optoelectronic parameters, Ternary. 179 190 http://ijop.ir/browse.php?a_code=A-10-71-3&slc_lang=en&sid=1 Habib Kazemi Chubi habibkazemichubi@iau.ir 10031947532846005358 10031947532846005358 No aFaculty of Physics, University of Tabriz, Tabriz, Iran Davoud Raeyani raeyani.davoud@gmail.com 10031947532846005359 10031947532846005359 No cPhotonics Devices Research Group, Research Institute of Applied Physics and Astronomy, University of Tabriz, Tabriz, Iran Asghar Asgari asgari@tabrizu.ac.ir 10031947532846005360 10031947532846005360 Yes cPhotonics Devices Research Group, Research Institute of Applied Physics and Astronomy, University of Tabriz, Tabriz, Iran