Structure-properties relationships in triarylamine-based donor-acceptor molecules containing naphtyl groups as donor material for organic solar cells

Non-fullerene small acceptor molecules have gained significant attention for application in organic solar cells owing to their advantages over fullerene based acceptors.

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Role of the donor material and the donor–acceptor mixing ratio in increasing the efficiency of Schottky junction organic solar cells

Organic Electronics ◽

10.1016/j.orgel.2013.06.001 ◽

2013 ◽

Vol 14 (10) ◽

pp. 2392-2400 ◽

Cited By ~ 27

Author(s):

Sibi Sutty ◽

Graeme Williams ◽

Hany Aziz

Keyword(s):

Solar Cells ◽

Organic Solar Cells ◽

Schottky Junction ◽

Mixing Ratio ◽

Donor Material ◽

Donor Acceptor

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Fabrication of organic solar cells based on a blend of donor-acceptor molecules by inkjet printing technique

2008 IEEE International Conference on Semiconductor Electronics ◽

10.1109/smelec.2008.4770332 ◽

2008 ◽

Cited By ~ 8

Author(s):

Ashkan Shafiee ◽

Muhamad Mat Salleh ◽

Muhammad Yahaya

Keyword(s):

Solar Cells ◽

Inkjet Printing ◽

Organic Solar Cells ◽

Printing Technique ◽

Donor Acceptor ◽

Acceptor Molecules

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Branched Electron-Donor Core Effect in D-π-A Star-Shaped Small Molecules on Their Properties and Performance in Single-Component and Bulk-Heterojunction Organic Solar Cells

Energies ◽

10.3390/en14123596 ◽

2021 ◽

Vol 14 (12) ◽

pp. 3596

Author(s):

Alexander N. Solodukhin ◽

Yuriy N. Luponosov ◽

Artur L. Mannanov ◽

Petr S. Savchenko ◽

Artem V. Bakirov ◽

...

Keyword(s):

Solar Cells ◽

Organic Solar Cells ◽

Bulk Heterojunction ◽

Photovoltaic Performance ◽

Charge Carrier Mobility ◽

Single Component ◽

Orbital Energy ◽

Donor Acceptor ◽

And Performance ◽

Acceptor Molecules

Star-shaped donor-acceptor molecules are full of promise for organic photovoltaics and electronics. However, the effect of the branching core on physicochemical properties, charge transport and photovoltaic performance of such donor-acceptor materials in single-component (SC) and bulk heterojunction (BHJ) organic solar cells has not been thoroughly addressed. This work shows the comprehensive investigation of six star-shaped donor-acceptor molecules with terminal hexyldicyanovinyl blocks linked through 2,2′-bithiophene π-conjugated bridge to different electron-donating cores such as the pristine and fused triphenylamine, tris(2-methoxyphenyl)amine, carbazole- and benzotriindole-based units. Variation of the branching core strongly impacts on such important properties as the solubility, highest occupied molecular orbital energy, optical absorption, phase behavior, molecular packing and also on the charge-carrier mobility. The performance of SC or BHJ organic solar cells are comprehensively studied and compared. The results obtained provide insight on how to predict and fine-tune photovoltaic performance as well as properties of donor-acceptor star-shaped molecules for organic solar cells.

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Single-Component Organic Solar Cells Based on Intramolecular Charge Transfer Photoabsorption

Materials ◽

10.3390/ma14051200 ◽

2021 ◽

Vol 14 (5) ◽

pp. 1200

Author(s):

Ken-ichi Nakayama ◽

Tatsuya Okura ◽

Yuki Okuda ◽

Jun Matsui ◽

Akito Masuhara ◽

...

Keyword(s):

Solar Cells ◽

Charge Transfer ◽

Organic Solar Cells ◽

Intramolecular Charge Transfer ◽

Internal Quantum Efficiency ◽

Single Component ◽

Chemical Calculation ◽

Key Factor ◽

Donor Acceptor ◽

Acceptor Molecules

Conjugated donor–acceptor molecules with intramolecular charge transfer absorption are employed for single-component organic solar cells. Among the five types of donor–acceptor molecules, the strong push–pull structure of DTDCPB resulted in solar cells with high JSC, an internal quantum efficiency exceeding 20%, and high VOC exceeding 1 V with little photon energy loss around 0.7 eV. The exciton binding energy (EBE), which is a key factor in enhancing the photocurrent in the single-component device, was determined by quantum chemical calculation. The relationship between the photoexcited state and the device performance suggests that the strong internal charge transfer is effective for reducing the EBE. Furthermore, molecular packing in the film is shown to influence photogeneration in the film bulk.

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