Bisadducts of C70as Electron Acceptors for Bulk Heterojunction Solar Cells: A Theoretical Study

Four new azafullerene monoadducts (DPS-C59N, HDP-C59N, DBOP-C59N, DHOP-C59N) have been prepared and applied as electron acceptors in solution-processed bulk heterojunction solar cells. The four compounds were designed so that their solubility in organic solvents was maximized and that structure–property comparisons could be drawn with a previously synthesized azafullerene electron acceptor. With the photovoltaic devices that were prepared from the four azafullerenes and polymeric electron donor PTB7 we found that only one of the four new electron acceptors resulted in a power conversion efficiency that exceeded the one observed with a previously reported azafullerene monoadduct. Atomic force microscopy and electron mobility measurements suggest that azafullerenes bearing two alkyl chains lead to non-optimal film morphologies as well as electron mobilities and that future efforts should focus on single n-alkyl substitution.

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Theoretical study of new conjugated compounds with a low bandgap for bulk heterojunction solar cells: DFT and TD-DFT study

Results in Chemistry ◽

10.1016/j.rechem.2020.100040 ◽

2020 ◽

Vol 2 ◽

pp. 100040 ◽

Cited By ~ 2

Author(s):

M. Raftani ◽

T. Abram ◽

N. Bennani ◽

M. Bouachrine

Keyword(s):

Solar Cells ◽

Theoretical Study ◽

Bulk Heterojunction ◽

Dft Study ◽

Heterojunction Solar Cells ◽

Low Bandgap ◽

Bulk Heterojunction Solar Cells ◽

Td Dft ◽

Conjugated Compounds

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Molecular helices as electron acceptors in high-performance bulk heterojunction solar cells

Nature Communications ◽

10.1038/ncomms9242 ◽

2015 ◽

Vol 6 (1) ◽

Cited By ~ 431

Author(s):

Yu Zhong ◽

M. Tuan Trinh ◽

Rongsheng Chen ◽

Geoffrey E. Purdum ◽

Petr P. Khlyabich ◽

...

Keyword(s):

Solar Cells ◽

High Performance ◽

Bulk Heterojunction ◽

Electron Acceptors ◽

Heterojunction Solar Cells ◽

Bulk Heterojunction Solar Cells

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Small molecular non-fullerene electron acceptors for P3HT-based bulk-heterojunction solar cells

Science China Chemistry ◽

10.1007/s11426-014-5129-4 ◽

2014 ◽

Vol 57 (7) ◽

pp. 973-981 ◽

Cited By ~ 13

Author(s):

Xin Liu ◽

Ping Cai ◽

DongChen Chen ◽

JunWu Chen ◽

ShiJian Su ◽

...

Keyword(s):

Solar Cells ◽

Bulk Heterojunction ◽

Electron Acceptors ◽

Heterojunction Solar Cells ◽

Bulk Heterojunction Solar Cells

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Dimeric Phenazinothiadiazole Acceptors in Bulk Heterojunction Solar Cells

Organic Materials ◽

10.1055/s-0041-1726459 ◽

2021 ◽

Vol 03 (02) ◽

pp. 168-173

Author(s):

Lukas Ahrens ◽

Yvonne J. Hofstetter ◽

Baris Celik ◽

Julian F. Butscher ◽

Frank Rominger ◽

...

Keyword(s):

Thin Films ◽

Solar Cells ◽

Bulk Heterojunction ◽

Power Conversion ◽

Electron Acceptors ◽

Device Performance ◽

Heterojunction Solar Cells ◽

Bulk Heterojunction Solar Cells ◽

Covalently Linked ◽

Conversion Efficiencies

Two covalently linked triisopropylsilyl-ethynylated phenazinothiadiazoles were prepared through condensation of a spirocyclic and a bicyclic tetraketone with a 5,6-diaminobenzothiadiazole. The spirobisindene- and the ethanoanthracene-based linkers render the electron acceptors amorphous in thin films. The optoelectronic properties of the non-conjugated dimers are indistinguishable from that of the crystalline monomer. Bulk heterojunction solar cells were prepared with power conversion efficiencies peaking at 1.6%. The choice of linker neither influenced optical and electrochemical properties nor device performance.

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