A rational design strategy for donors in organic solar cells: the conjugated planar molecules possessing anisotropic multibranches and intramolecular charge transfer

The use of an A–D–A′–D–A strategy to develop small molecule acceptors with broad absorption spectra through suppressing the intramolecular charge transfer effect is studied.

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Fluorene functionalised sexithiophenes—utilising intramolecular charge transfer to extend the photocurrent spectrum in organic solar cells

Journal of Materials Chemistry ◽

10.1039/b609858d ◽

2007 ◽

Vol 17 (11) ◽

pp. 1055-1062 ◽

Cited By ~ 23

Author(s):

Peter J. Skabara ◽

Rory Berridge ◽

Igor M. Serebryakov ◽

Alexander L. Kanibolotsky ◽

Lyudmila Kanibolotskaya ◽

...

Keyword(s):

Solar Cells ◽

Charge Transfer ◽

Organic Solar Cells ◽

Intramolecular Charge Transfer ◽

Photocurrent Spectrum

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Enhanced intramolecular charge transfer of unfused electron acceptors for efficient organic solar cells

Materials Chemistry Frontiers ◽

10.1039/c8qm00609a ◽

2019 ◽

Vol 3 (3) ◽

pp. 513-519 ◽

Cited By ~ 20

Author(s):

Ran Qin ◽

Weitao Yang ◽

Shuixing Li ◽

Tsz-Ki Lau ◽

Zhipeng Yu ◽

...

Keyword(s):

Solar Cells ◽

Charge Transfer ◽

Organic Solar Cells ◽

Intramolecular Charge Transfer ◽

Electron Acceptors ◽

Transfer Effects ◽

Planar Configuration ◽

Non Covalent Interactions ◽

Covalent Interactions

The mediation of non-covalent interactions allowed unfused structures to exhibit a nearly planar configuration with strong charge-transfer effects, thereby ensuring efficient 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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Uphill and downhill charge generation from charge transfer to charge separated states in organic solar cells

Journal of Materials Chemistry C ◽

10.1039/d1tc02351a ◽

2021 ◽

Author(s):

Shahidul Alam ◽

Vojtech Nádaždy ◽

Tomáš Váry ◽

Christian Friebe ◽

Rico Meitzner ◽

...

Keyword(s):

Cyclic Voltammetry ◽

Solar Cells ◽

Charge Transfer ◽

Energy Level ◽

Density Of States ◽

Organic Solar Cells ◽

Joint Density ◽

Charge Generation ◽

Donor Acceptor

Energy level alignments at the organic donor–acceptor interface cannot be predicted from cyclic voltammetry. Onsets for joint density of states and charge generation, reveal cases of energy uphill and – newly observed – downhill charge generation.

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