| 초록 |
Over the past few decades, polymer solar cells (PSCs) have made a significant progress, showing their potential in low-cost, flexible, lightweight, portable and large-area energy-harvesting devices. To further improve the PCE value, first and foremost, the molecular structure of low bandgap (LBG) polymers should be carefully designed by considering its close relationship with the photovoltaic parameters, including short-circuit current density (JSC), open-circuit voltage (VOC) and fill factor (FF). Here, we present a series of crystalline low bandgap polymers which were designed by considering the backbone planarity, noncovalent intra- and interchain interactions (via H-bonding and dipole-dipole interactions, etc) and solution processibility, leading to highly ordered film morphologies, deep highest occupied molecular orbital (HOMO) level, balanced electron and hole mobilities. |
