Prolonging the exciton diffusion length by manipulating molecular stacking enables pseudo-planar heterojunction organic solar cells to achieve over 19% efficiency
Ke Wang, Fuwen Zhao, Yufan Zhu, Yi He, Zesheng Liu, Xiao Han, Qi Ai, Xingxing Shen, Bao Li, Jianqi Zhang, Yuze Lin, Chunru Wang, Dan He
Abstract
A solid additive, SA-5F, is employed to promote molecular stacking, which leads to higher crystallinity, boosting the exciton diffusion coefficient and then exciton diffusion length. Thus, D18/Y6+-based PPHJ OSCs afford an impressive PCE of 19.11%.
Topics & Concepts
StackingExcitonCrystallinityDiffusionOrganic solar cellPlanarMaterials scienceHeterojunctionOptoelectronicsPolymer solar cellChemical physicsCondensed matter physicsChemistryPolymerSolar cellPhysicsThermodynamicsComputer scienceComposite materialOrganic chemistryComputer graphics (images)Organic Electronics and PhotovoltaicsConducting polymers and applicationsPerovskite Materials and Applications