articleAdvanced MaterialsMar 29, 2020Closed access

Single‐Junction Organic Photovoltaic Cells with Approaching 18% Efficiency

YCYong CuiHYHuifeng YaoJZJianqi ZhangKXKaihu XianTZTao Zhang

Chinese Academy of Sciences · Beijing National Laboratory for Molecular Sciences · +4 more institutions

PubMed
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Abstract

Optimizing the molecular structures of organic photovoltaic (OPV) materials is one of the most effective methods to boost power conversion efficiencies (PCEs). For an excellent molecular system with a certain conjugated skeleton, fine tuning the alky chains is of considerable significance to fully explore its photovoltaic potential. In this work, the optimization of alkyl chains is performed on a chlorinated nonfullerene acceptor (NFA) named BTP-4Cl-BO (a Y6 derivative) and very impressive photovoltaic parameters in OPV cells are obtained. To get more ordered intermolecular packing, the n-undecyl is shortened at the edge of BTP-eC11 to n-nonyl and n-heptyl. As a result, the NFAs of BTP-eC9 and BTP-eC7 are…

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Topics & keywords

Topics
Keywords
  • Materials science
  • Photovoltaic system
  • Organic solar cell
  • Nanotechnology
  • Optoelectronics
  • Engineering physics
  • Composite material
  • Electrical engineering
UN Sustainable Development Goals
  • Affordable and clean energy
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