n-Type Molecular Photovoltaic Materials: Design Strategies and Device Applications

• DOI: 10.1021/jacs.0c04084
• Publication Date: 2020-05-28T01:20:47Z
• Authors: Qihui Yue; Wuyue Liu; Xiaozhang Zhu
• Keywords: Energy transformation

The use of photovoltaic technologies has been regarded as a promising approach for converting solar energy to electricity and mitigating the crisis, among these, organic photovoltaics (OPVs) have attracted broad interest because their solution processability, flexibility, light weight, potential large-area processing. development OPV materials, especially electron acceptors, one focuses in recent years. Compared with fullerene derivates, n-type non-fullerene molecules some unique merits, such synthetic simplicity, high tunability absorption levels, small loss. In last 5 years, cells based on achieved significant breakthrough power conversion efficiency from approximately 4% over 17%, which is superior those fullerene-based cells; meanwhile, created brand new opportunities application OPVs special situations. This Perspective analyzes key design strategies high-performance molecular materials highlights instructive examples various applications, including ternary tandem cells, high-efficiency semitransparent power-generating building facades windows, indoor driving low-power-consumption devices. Moreover, accelerate pace toward commercialization OPVs, existing challenges future directions are also reviewed perspectives efficiency, stability, fabrication.