Acceptor Materials

Acceptor Materials for Organic Solar Cell Device
The key component in a high performance organic photovoltaic (OPV) device is a bulk-heterojunction active layer consisting of a blend of electron donors and electron acceptors.
In the past decades, the donor materials are generally a p-type conjugated polymer, and the acceptor materials are typically an n-type fullerene derivative. This type of bulk-heterojunction has allowed the photo-conversion-efficiency (PCE) of OPVs to reach values close to 11%, a value believed to be close to the theoretical limit for polymer/fullerene single layer OPV devices.
Very recently, a new class of n-type materials, particularly small molecules and oligomers, have emerged as promising alternative acceptors than fullerene derivatives to make bulk-heterojunctions in an OPV device. These new acceptor materials, broadly labeled as “non-fullerene acceptors′′ (NFA), offer several advantages over fullerene acceptors. For instance, the synthesis of these new NFA acceptors are generally through various low-cost routes using building block materials with excellent chemical, thermal, and photostability. Additionally, the easy functionalization of these new NFA acceptor materials offers excellent tunability to their optoelectronic and electrochemical properties compared to fullerenes.
Bulk-heterojunctions made with p-type donor and new n-type NFA acceptors have now resulted in improved PCE of OPVs to >16% for single-junction devices, and >17% for tandem cells, due to the improved properties of NFA acceptors as noted:
  • increased photocurrent due to a higher absorption coefficient
  • improved cell voltage due to a reduction in non-radiative energy losses
  • high device photostability
Theoretical estimates are now more optimistic for NFA-based OPV devices, and further improved efficiencies may be realistically achievable by optimizing polymer/NFA bulk heterojunctions.

Fullerene Acceptor Materials

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802832 4-(1′,5′-Dihydro-1′-methyl-2′H-[5,6]fullereno-C60-Ih-[1,9-c]pyrrol-2′-yl)benzoic acid
704326 [6.6] Diphenyl C62 bis(butyric acid methyl ester)(mixture of isomers) 99.5%
482994 [5,6]-Fullerene-C70 98% Green Alternative
709476 [5,6]-Fullerene-C70 sublimed, ≥99% (HPLC) Green Alternative
572500 Fullerene-C60 sublimed, 99.9% Green Alternative
753955 ICBA 99% (HPLC)
753947 ICMA 97% (HPLC)
684503 [6,6]-Pentadeuterophenyl C61 butyric acid methyl ester 99.5%, 99.5 atom % D
685321 [6,6]-Phenyl-C61 butyric acid butyl ester >97%
684449 [6,6]-Phenyl C61 butyric acid methyl ester >99.5%
684430 [6,6]-Phenyl C61 butyric acid methyl ester >99%
684457 [6,6]-Phenyl C61 butyric acid methyl ester >99.9%
684465 [6,6]-Phenyl C71 butyric acid methyl ester, mixture of isomers 99%
684481 [6,6]-Phenyl-C61 butyric acid octyl ester ≥99%
707473 Small gap fullerene-ethyl nipecotate ≥95% Green Alternative
707503 Small gap fullerenes Green Alternative
688215 [6,6]-Thienyl C61 butyric acid methyl ester ≥99%

Non-fullerene Acceptor Materials

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667846 BBL
906824 BT-CIC ≥98%
906379 COi8DFIC ≥98%
446653 Copper(II) 1,2,3,4,8,9,10,11,15,16,17,18,22,23,24,25-hexadecafluoro-29H,31H-phthalocyanine Dye content 80 %
900774 Di-PDI
900853 EH-IDTBR
900854 FBR
906972 F-M
910635 IDT-2Br ≥99%
900810 O-IDTBR
900799 ITIC
901423 ITIC-F
900947 ITIC-M
906387 ITIC-Cl
900803 ITIC-DM
900800 ITIC-Th
900962 N2300
900961 P(NDI2OD-T2)
901144 nPDI
901143 PDI-DPP-PDI
P11255 PTCDA 97%
900782 SF-PDI
901146 TPDI-Hex
908509 Y6