Elucidating Charge Generation in Green-Solvent Processed Organic Solar Cells

Shoaee, Safa; Sanna, Anna Laura; Sforazzini, Giuseppe

doi:10.3390/molecules26247439

Cited by 7 publications

(8 citation statements)

References 60 publications

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“…Although the PCEs of these high-performance OSCs have met the acquirement of commercialization, the fabrication of these ASM-OSCs primarily relies on halogenated solvent for dissolving materials, such as chloroform (CF). ,− ,, Additionally, some ASM-OSCs incorporate halogenated solvents like 1,8-diiodooctane (DIO), CF, and chlorobenzene (CB) as additives or for processing solvent vapor annealing (SVA). ,,, These processes are unsuitable for a large-scale commercial production in the future due to their harmful effects on the environment and human health. − Therefore, there is an urgent need to explore greener fabrication processes for these devices.…”

Section: Introductionmentioning

confidence: 99%

High-Performance All-Small-Molecule Organic Solar Cells Fabricated via Halogen-Free Preparation Process

Du,

Ma,

Zhang

et al. 2024

ACS Appl. Mater. Interfaces

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Small-molecule organic photovoltaic materials attract more attention attributing to their precisely defined structure, ease of synthesis, and reduced batch-tobatch variations. The majority of all-small-molecule organic solar cells (ASM-OSCs) have traditionally relied on halogenated solvents for dissolving photovoltaic materials as well as used for the additives or solvent vapor annealing. However, these halogen-based processes pose risks to the environment and human health, potentially impeding future commercial production. Herein, we conducted an investigation into the impact of various nonhalogen solvents on the performance of the devices. By selecting the high boiling point solvent toluene, we achieved a desirable phase separation and stable morphology characterized by fibrous crystals within the blend film. Consequently, the power conversion efficiencies of 14.4 and 11.7% were obtained from H31:Y6-based small-area (0.04 cm 2 ) and large-area (1 cm 2 ) devices with steady performance, respectively. This study successfully demonstrated the fabrication of ASM-OSCs without employing halogenated solvent processes, thus offering promising prospects for the commercial production of ASM-OSCs.

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Section: Introductionmentioning

confidence: 99%

High-Performance All-Small-Molecule Organic Solar Cells Fabricated via Halogen-Free Preparation Process

Du,

Ma,

Zhang

et al. 2024

ACS Appl. Mater. Interfaces

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“…Solar cells for generating electricity from solar energy have also been around for decades, gradually deriving from the first generation into various forms, including dyesensitized solar cells, thin-film solar cells, and OSCs [2]. OSCs may turn into the most inexpensive electric power form as the power conversion efficiency (PCE) of them continues to rise [3]. The characteristics of OSCs include semitransparency, non-toxicity, good flexibility, and low preparation cost, fit for roll-to-roll massive processing, so they have received worldwide attention [4].…”

Section: Introductionmentioning

confidence: 99%

Development of fullerene acceptors and the application of non-fullerene acceptors in organic solar cells

Du,

Wang,

et al. 2024

Front. Phys.

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Organic solar cells (OSCs) enjoy a huge market and public attention as an emerging renewable and clean energy source due to their accessibility, sustainability, translucency, good flexibility, non-toxicity, and low preparation cost. However, the choice of an acceptor material is now the pivotal factor restricting the development of OSCs. To continuously improve stability and increase power conversion efficiency (PCE) for better performance, high-performance acceptor materials are an important part of enabling OSCs. From fullerenes and their derivatives and non-fullerenes, we sum up the latest research progress on high-performance acceptor materials for OSCs and then introduce the synthesis methods of non-fullerenes. The latest strategies to enhance the performance of organic solar cells and the wide range of applications of non-fullerene acceptors (NFAs) on different OSCs are also discussed. In addition, challenges faced by OSCs in improving their performance and the prospects for future development are revealed, providing new ideas for designing the next generation of high-performance OSCs.

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“…Conjugated compounds have been widely investigated as active components in numerous optoelectronic applications including light‐emitting diodes,[ 1 , 2 , 3 , 4 , 5 ] solar cells,[ 6 , 7 , 8 , 9 ] field‐effect transistors,[ 10 , 11 , 12 , 13 ] lasers,[ 14 , 15 , 16 , 17 ] and sensors. [ 18 , 19 , 20 , 21 , 22 ] Continuous efforts in the development of smart molecular design with thoughtful structure–property relationships, and control of the intermolecular interactions in the bulk, have allowed this class of molecules to reach unprecedented diffusion into commercial applications, for example, OLED screens and automotive lighting.…”

Section: Introductionmentioning

confidence: 99%

Light‐Responsive Oligothiophenes Incorporating Photochromic Torsional Switches

Jozeliūnaitė

Rahmanudin

Gražulis

et al. 2022

Chemistry A European J

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We present a quaterthiophene and sexithiophene that can reversibly change their effective π-conjugation length through photoexcitation. The reported compounds make use of light-responsive molecular actuators consisting of an azobenzene attached to a bithiophene unit by both direct and linker-assisted bonding. Upon exposure to 350 nm light, the azobenzene undergoes trans-to-cis isomerization, thus mechanically inducing the oligothiophene to assume a planar conformation (extended π-conjugation). Exposure to 254 nm wavelength promotes azobenzene cis-to-trans isomerization, forcing the thiophenic backbones to twist out of planarity (confined π-conjugation). Twisted conformations are also reached by cis-to-trans thermal relaxation at a rate that increases proportionally with the conjugation length of the oligothiophene moiety. The molecular conformations of quaterthiophene and sexithiophene were characterized by using steady-state UV-vis spectroscopy, X-ray crystallography and quantum-chemical modeling. Finally, we tested the proposed light-responsive oligothiophenes in field-effect transistors to probe the photo-induced tuning of their electronic properties.

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Elucidating Charge Generation in Green-Solvent Processed Organic Solar Cells

Cited by 7 publications

References 60 publications

High-Performance All-Small-Molecule Organic Solar Cells Fabricated via Halogen-Free Preparation Process

High-Performance All-Small-Molecule Organic Solar Cells Fabricated via Halogen-Free Preparation Process

Development of fullerene acceptors and the application of non-fullerene acceptors in organic solar cells

Light‐Responsive Oligothiophenes Incorporating Photochromic Torsional Switches

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