908509 Sigma-Aldrich


Synonym: BTP-4F, Non fullerene acceptor Y6, PCE 157

  • Empirical Formula (Hill Notation) C82H86F4N8O2S5

  • Molecular Weight 1451.93



Related Categories Acceptor Materials, Materials Science, Non-fullerene Acceptor Materials, Organic Field Effect Transistor (OFET) Materials, Organic Photovoltaic (OPV) Materials,
description   Band gap: 1.55 eV
assay   ≥99%
form   solid
solubility   chloroform: soluble
Orbital energy   HOMO -5.65 eV 
  LUMO -4.10 eV 


General description

Non-fullerene acceptors (NFAs) are currently a major focus of research in the development of bulk-heterojunction organic solar cells (OSCs). In contrast to the widely used fullerene acceptors (FAs), the optical properties and electronic energy levels of NFAs can be designed and readily tuned. NFA-based OSCs can also achieve greater thermal stability and photochemical stability, as well as longer device lifetimes, than their FA-based counterparts.Recent developments have led to a rapid increase in power conversion efficiencies for NFA OSCs, with values now exceeding 15% in a single junction cell, and >17% for a tandem cell, demonstrating the viability of using NFAs to replace FAs in next-generation high-performance OSCs.


Y6 is a non-fullerene acceptor (NFA) that uses an electron-deficient molecular core to obtain a low bandgap with improved electron affinity. OPV devices made from Y6 can reach exceptionally high performances in single-junction devices, with a maximum PCE reported of 15.7% (14.9% certified by Enli Tech Laboratory) when paired with PM6. Y6 is versatile and can be employed in both conventional and inverted OPV device architectures and can maintain a high PCE with varying active layer thicknesses (13.6% in thick 300 nm layers).

Safety & Documentation

Safety Information

WGK Germany 
Flash Point(F) 
Not applicable
Flash Point(C) 
Not applicable


Certificate of Analysis (COA)

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Protocols & Articles


Progress for High Performance Tandem Organic Solar Cells

The Centre of Nanoscale Science and Technology and Key Laboratory of Functional Polymer Materials, Institute of Polymer Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China State...
Keywords: Absorption, Nucleic acid annealing, Polymer science, Recombination, Renewable energy, Semiconductor, Separation, Solar cells

Peer-Reviewed Papers


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