Impact of Nitrogen-to-Phosphorus Substitution on End Group of the Y6 Nonfullerene Molecule for Organic Photovoltaics: A Comprehensive Modeling Study - Leandro Benatto; Guilherme C. Q. da Silva; Matheus F. F. das Neves; João Paulo A. Souza; Luana Wouk; Lucimara Stolz Roman; Marlus Koehler; Graziâni Candiotto (ACS Omega)