Effect of halogen/chalcogen substitution on the dielectric constant of asymmetric acceptor alloy to improve the efficiency and stability of inverted organic photovoltaics
Yanbo Wang, Yung‐Jing Xue, Chieh‐Ming Hung, Kuo‐Hsiu Huang, Bing‐Huang Jiang, Chia‐Lin Tsai, Yu‐Chi Huang, Hong‐Yi Chen, Shang‐Da Yang, Su‐Ying Chien, Chih‐Ping Chen, Pi‐Tai Chou, Yen‐Ju Cheng
Abstract
= 309 ps). The inverted PM6:CBrB-Cl:CB-Se device achieved a high PCE of 18.33%, which is considered to be one of the highest among inverted OPV devices. This work reveals that bromine/selenium substitution enhances the dielectric constant and crystalline packing, thereby advancing molecular design and improving device performance.
Topics & Concepts
ChalcogenElectronegativityDielectricOrganic solar cellHalogenAcceptorFullereneMaterials scienceComputational chemistryChemical physicsPhotochemistryChemistryOptoelectronicsOrganic chemistryAlkylCondensed matter physicsPolymerPhysicsOrganic Electronics and PhotovoltaicsMolecular Junctions and NanostructuresConducting polymers and applications