Organic solar cells (OSCs) have been a potential photovoltaic technology because of their flexibility, lightweight, low production cost, and possibility of roll-to-roll processi bility. Their performance has been limited by relatively weak light absorption and short exciton diffusion lengths in the active layer [1,2]. To surmount these limitations, plas monic nanostructures have been incorporated into OSCs to boost light harvesting and
power conversion efficiency (PCE) [3,4]. Among various plasmonic strategies, the use of dielectric core–shell nanoparticles has gained significant attention as a viable method for optimizing optical absorption without inducing substantial charge recombination losses [5,6].