Small-Molecule Acceptor Based on the Heptacyclic Benzodi(cyclopentadithiophene) Unit for Highly Efficient Nonfullerene Organic Solar Cells,Journal of the American Chemical Society

当前位置： X-MOL 学术 › J. Am. Chem. Soc. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Small-Molecule Acceptor Based on the Heptacyclic Benzodi(cyclopentadithiophene) Unit for Highly Efficient Nonfullerene Organic Solar Cells
Journal of the American Chemical Society ( IF 14.4 ) Pub Date : 2017-03-24 , DOI: 10.1021/jacs.7b01170
Bin Kan _{1,

2} , Huanran Feng _{1,

2} , Xiangjian Wan _{1,

2} , Feng Liu ₃ , Xin Ke _{1,

2} , Yanbo Wang _{1,

2} , Yunchuang Wang _{1,

2} , Hongtao Zhang _{1,

2} , Chenxi Li _{1,

2} , Jianhui Hou ₄ , Yongsheng Chen _{1,

2}

Affiliation

A new nonfullerene small molecule with acceptor-donor-acceptor (A-D-A) structure, namely, NFBDT, based on a heptacyclic benzodi(cyclopentadithiophene) (FBDT) unit using benzo[1,2-b:4,5-b']dithiophene as the core unit, was designed and synthesized. Its absorption ability, energy levels, thermal stability, as well as photovoltaic performances were fully investigated. NFBDT exhibits a low optical bandgap of 1.56 eV resulting in wide and efficient absorption that covered the range from 600 to 800 nm, and suitable energy levels as an electron acceptor. With the widely used and successful wide bandgap polymer PBDB-T selected as the electron donor material, an optimized PCE of 10.42% was obtained for the PBDB-T:NFBDT-based device with an outstanding short-circuit current density of 17.85 mA cm-2 under AM 1.5G irradiation (100 mW cm-2), which is so far among the highest performance of NF-OSC devices. These results demonstrate that the BDT unit could also be applied for designing NF-acceptors, and the fused-ring benzodi(cyclopentadithiophene) unit is a prospective block for designing new NF-acceptors with excellent performance.

中文翻译：

用于高效非富勒烯有机太阳能电池的基于七环苯并二（环戊二噻吩）单元的小分子受体

一种具有受体-供体-受体 (ADA) 结构的新型非富勒烯小分子，即 NFBDT，基于七环苯并二(环戊二噻吩) (FBDT) 单元，使用苯并[1,2-b:4,5-b']二噻吩作为核心单元被设计和合成。对其吸收能力、能级、热稳定性以及光伏性能进行了充分研究。NFBDT 具有 1.56 eV 的低光学带隙，导致覆盖范围从 600 到 800 nm 的宽而有效的吸收，以及作为电子受体的合适能级。使用广泛使用且成功的宽带隙聚合物 PBDB-T 作为电子供体材料，基于 PBDB-T:NFBDT 的器件获得了 10.42% 的优化 PCE，具有出色的短路电流密度 17.85 mA cm- 2 在 AM 1.5G 照射下 (100 mW cm-2)，这是迄今为止性能最高的 NF-OSC 设备之一。这些结果表明，BDT 单元也可用于设计 NF 受体，而稠环苯并二（环戊二噻吩）单元是设计具有优异性能的新型 NF 受体的潜在模块。

更新日期：2017-03-24

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南11