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906379

Sigma-Aldrich

COi8DFIC

≥98%

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Synonym(s):
2,2′-[[4,4,11,11-tetrakis(4-hexylphenyl)-4,11-dihydrothieno[2′,3′:4,5]thieno[2,3-d]thieno[2′′′′,3′′′′:4′′′,5′′′]thieno[2′′′,3′′′:4′′,5′′]pyrano[2′′,3′′:4′,5′]thieno[2′,3′:4,5]thieno[3,2-b]pyran-2,9-diyl]bis[methylidyne(5,6-difluoro, NFA146, O6T-4F, PCE146
Empirical Formula (Hill Notation):
C94H76F4N4O4S6
CAS Number:
Molecular Weight:
1594.02

description

Band gap: 1.62 eV

assay

≥98%

form

solid

solubility

soluble (chloroform, CB and ODCB)

orbital energy

HOMO -5.5 eV 
LUMO -3.88 eV 

Related Categories

General description

COi8DFIC or O6T-4F is a highly efficient, n-type, low-bandgap nonfullerene acceptor with strong NIR absorption.
In a recent study, COi8DFIC or O6T-4F was selected in a Tandem cell by computer assited design and gave a record PCE of 17.3∃% for fabricated organic solar cells.
COi8DFIC or O6T-4F is frequently selected to blend with a narrow-bandgap donor material and another narrow bandgap acceptor material to fabricate ternary organic solar cells. The PTB7-Th:COi8DFIC:PC71BM ternary cells offered a PCE of 14.08%. By further adopting a post-annealing process, an outstanding PCE of 14.62% can be achieved. Furthermore, the device utilizing COi8DFIC exhibited a good thermal stability with PCEs over 13.5% in a wide temperature range (70–160 °C).

Application

COi8DFIC is primarily utilized as a non-fullerene acceptor in OPV devices. It exhibits a broad absorption spectrum, enabling it to absorb light across a wide range of wavelengths, including the visible and near-infrared regions. This property allows for efficient utilization of a broader range of solar radiation, enhancing the light-harvesting capability of the OPV device. COi8DFIC can be employed as the electron transport material in OFET devices.
COi8DFIC or O6T-4F is a highly efficient, n-type, low-bandgap nonfullerene acceptor with strong NIR absorption
In a recent study, COi8DFIC or O6T-4F was selected in a Tandem cell by computer assited design and gave a record PCE of 17.3% for fabricated organic solar cells.

Tandem Cell Device performance:
ITO/ZnO/PFN-Br/PBDB-T:F-M/M-PEDOT/ZnO/PTB7- Th:O6T-4F:PC71BM/MoO3/Ag
Voc=1.642 V
Jsc=14.35 mA/cm2
FF=73.7%
PCE=17.3%
COi8DFIC or O6T-4F is frequently selected to blend with a narrow-bandgap donor material and another narrow bandgap acceptor material to fabricate ternary organic solar cells. The PTB7-Th:COi8DFIC:PC71BM ternary cells offered a PCE of 14.08%. By further adopting a post-annealing process, an outstanding PCE of 14.62% can be achieved. Furthermore, the device utilizing COi8DFIC exhibited a good thermal stability with PCEs over 13.5% in a wide temperature range (70-160 °C).

Device structure:
ITO/ZnO/PTB7-Th:COi8DFIC:PC71BM/MoO3/Ag
  • Before annealing
Voc=0.702 V
Jsc=27.74 mA/cm2
FF=0.701
PCE=13.65%

  • After annealing at 80°C
Voc=0.727 V
Jsc=27.39 mA/cm2
FF=0.734
PCE=14.62%
COi8DFIC, an efficient non-fullerene acceptor material, has a strong near-infrared range (NIR) light absorption. It can be used as an n-type small molecule acceptor material for the fabrication of polymeric solar cells.

Storage Class

11 - Combustible Solids

wgk_germany

WGK 3

flash_point_f

Not applicable

flash_point_c

Not applicable


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Comparative analysis of burn-in photo-degradation in non-fullerene COi8DFIC acceptor based high-efficiency ternary organic solar cells
Duan L, et al.
Materials Chemistry Frontiers., 3(6), 1085-1096 (2019)
Thermostable single-junction organic solar cells with a power conversion efficiency of 14.62 %.
Li H, et al.
Science Bulletin, 63(6), 340-342 (2018)
Molecular order control of non-fullerene acceptors for high-efficiency polymer solar cells
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Simultaneously improved efficiency and average visible transmittance of semitransparent polymer solar cells with two ultra-narrow bandgap nonfullerene acceptors
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Ternary organic solar cells offer 14% power conversion efficiency.
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Science Bulletin, 62(23), 1562-1564 (2017)

Articles

Professor Chen (Nankai University, China) and his team explain the strategies behind their recent record-breaking organic solar cells, reaching a power conversion efficiency of 17.3%.

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